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Bao Z, Li C, Li G, Wang P, Peng Z, Cheng L, Li H, Zhang Z, Li Y, Huang W, Ye M, Dong D, Cheng Z, VanderZaag P, Jacobsen E, Bachem CWB, Dong S, Zhang C, Huang S, Zhou Q. Genome architecture and tetrasomic inheritance of autotetraploid potato. Mol Plant 2023; 16:1866. [PMID: 37837966 DOI: 10.1016/j.molp.2023.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2023]
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2
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Lin X, Torres Ascurra YC, Fillianti H, Dethier L, de Rond L, Domazakis E, Aguilera-Galvez C, Kiros AY, Jacobsen E, Visser RGF, Nürnberger T, Vleeshouwers VGAA. Recognition of Pep-13/25 MAMPs of Phytophthora localizes to an RLK locus in Solanum microdontum. Front Plant Sci 2023; 13:1037030. [PMID: 36714772 PMCID: PMC9879208 DOI: 10.3389/fpls.2022.1037030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/09/2022] [Indexed: 06/18/2023]
Abstract
Pattern-triggered immunity (PTI) in plants is mediated by cell surface-localized pattern recognition receptors (PRRs) upon perception of microbe-associated molecular pattern (MAMPs). MAMPs are conserved molecules across microbe species, or even kingdoms, and PRRs can confer broad-spectrum disease resistance. Pep-13/25 are well-characterized MAMPs in Phytophthora species, which are renowned devastating oomycete pathogens of potato and other plants, and for which genetic resistance is highly wanted. Pep-13/25 are derived from a 42 kDa transglutaminase GP42, but their cognate PRR has remained unknown. Here, we genetically mapped a novel surface immune receptor that recognizes Pep-25. By using effectoromics screening, we characterized the recognition spectrum of Pep-13/25 in diverse Solanaceae species. Response to Pep-13/25 was predominantly found in potato and related wild tuber-bearing Solanum species. Bulk-segregant RNA sequencing (BSR-Seq) and genetic mapping the response to Pep-25 led to a 0.081 cM region on the top of chromosome 3 in the wild potato species Solanum microdontum subsp. gigantophyllum. Some BAC clones in this region were isolated and sequenced, and we found the Pep-25 receptor locates in a complex receptor-like kinase (RLK) locus. This study is an important step toward the identification of the Pep-13/25 receptor, which can potentially lead to broad application in potato and various other hosts of Phytophthora species.
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Affiliation(s)
- Xiao Lin
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | | | - Happyka Fillianti
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Laura Dethier
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | - Laura de Rond
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | | | | | | | - Evert Jacobsen
- Plant Breeding, Wageningen University and Research, Wageningen, Netherlands
| | | | - Thorsten Nürnberger
- Department of Plant Biochemistry, Centre of Plant Molecular Biology (ZMBP), University of Tübingen, Tübingen, Germany
- Department of Biochemistry, University of Johannesburg, Johannesburg, South Africa
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Bagot M, Muller M, Kim YH, Ortiz-Romero PL, Zinzani PL, Beylot-Barry M, Dalle S, Jacobsen E, Combalia A, Huen A, Mehta-Shah N, Khodadoust MS, Viotti J, Paiva C, Porcu P. Lacutamab in patients with advanced mycosis fungoides according to KIR3DL2 expression: stage 1 results from the TELLOMAK phase 2 trial. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)00590-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Bao Z, Li C, Li G, Wang P, Peng Z, Cheng L, Li H, Zhang Z, Li Y, Huang W, Ye M, Dong D, Cheng Z, VanderZaag P, Jacobsen E, Bachem CWB, Dong S, Zhang C, Huang S, Zhou Q. Genome architecture and tetrasomic inheritance of autotetraploid potato. Mol Plant 2022; 15:1211-1226. [PMID: 35733345 DOI: 10.1016/j.molp.2022.06.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/16/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Potato (Solanum tuberosum) is the most consumed non-cereal food crop. Most commercial potato cultivars are autotetraploids with highly heterozygous genomes, severely hampering genetic analyses and improvement. By leveraging the state-of-the-art sequencing technologies and polyploid graph binning, we achieved a chromosome-scale, haplotype-resolved genome assembly of a cultivated potato, Cooperation-88 (C88). Intra-haplotype comparative analyses revealed extensive sequence and expression differences in this tetraploid genome. We identified haplotype-specific pericentromeres on chromosomes, suggesting a distinct evolutionary trajectory of potato homologous centromeres. Furthermore, we detected double reduction events that are unevenly distributed on haplotypes in 1021 of 1034 selfing progeny, a feature of autopolyploid inheritance. By distinguishing maternal and paternal haplotype sets in C88, we simulated the origin of heterosis in cultivated tetraploid with a survey of 3110 tetra-allelic loci with deleterious mutations, which were masked in the heterozygous condition by two parents. This study provides insights into the genomic architecture of autopolyploids and will guide their breeding.
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Affiliation(s)
- Zhigui Bao
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Canhui Li
- Key Laboratory for Potato Biology of Yunnan Province, The CAAS-YNNU-YINMORE Joint Academy of Potato Science, Yunnan Normal University, Kunming 650500, China
| | - Guangcun Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Tuber and Root Crop, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Pei Wang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Zhen Peng
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Lin Cheng
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Hongbo Li
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China; Plant Breeding, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands
| | - Zhiyang Zhang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Yuying Li
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Wu Huang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Mingwang Ye
- Key Laboratory for Potato Biology of Yunnan Province, The CAAS-YNNU-YINMORE Joint Academy of Potato Science, Yunnan Normal University, Kunming 650500, China
| | - Daofeng Dong
- Vegetable Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Zhukuan Cheng
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | | | - Evert Jacobsen
- Plant Breeding, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands
| | - Christian W B Bachem
- Plant Breeding, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, the Netherlands
| | - Suomeng Dong
- Department of Plant Pathology and Key Laboratory of Plant Immunity, Nanjing Agricultural University, Nanjing 210095, China
| | - Chunzhi Zhang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Sanwen Huang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China.
| | - Qian Zhou
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China; Peng Cheng Laboratory, Shenzhen 518055, China.
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Sun K, Schipper D, Jacobsen E, Visser RGF, Govers F, Bouwmeester K, Bai Y. Silencing susceptibility genes in potato hinders primary infection of Phytophthora infestans at different stages. Hortic Res 2022; 9:uhab058. [PMID: 35043191 PMCID: PMC8968627 DOI: 10.1093/hr/uhab058] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 11/12/2021] [Indexed: 06/01/2023]
Abstract
Most potato cultivars are susceptible to late blight disease caused by the oomycete pathogen Phytophthora infestans. A new source of resistance to prevent or diminish pathogen infection is found in the genetic loss of host susceptibility. Previously, we showed that RNAi-mediated silencing of the potato susceptibility (S) genes StDND1, StDMR1 and StDMR6 leads to increased late blight resistance. The mechanisms underlying this S-gene mediated resistance have thus far not been identified. In this study, we examined the infection process of P. infestans on StDND1-, StDMR1- and StDMR6-silenced potato lines. Microscopic analysis showed that penetration of P. infestans spores was hampered on StDND1-silenced plants. On StDMR1- and StDMR6-silenced plants, P. infestans infection was arrested at a primary infection stage by enhanced cell death responses. Histochemical staining revealed that StDMR1- and StDMR6-silenced plants display elevated ROS levels in cells at the infection sites. Resistance in StDND1-silenced plants, however, seems not to rely on a cell death response as ROS accumulation was found to be absent at most inoculated sites. Quantitative analysis of marker gene expression suggests that the increased resistance observed in StDND1- and StDMR6-silenced plants relies on an early onset of SA- and ET-mediated signalling pathways. Resistance mediated by silencing StDMR1 was found to be correlated with the early induction of SA-mediated signalling. These data provide evidence that different defense mechanisms are involved in late blight resistance mediated by functional impairment of different potato S-genes.
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Affiliation(s)
- Kaile Sun
- College of Horticulture, Henan Agricultural University, Nongye Road 63, 450002 Zhengzhou, Henan, China
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Danny Schipper
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Evert Jacobsen
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Richard G F Visser
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Francine Govers
- Laboratory of Phytopathology, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Klaas Bouwmeester
- Laboratory of Phytopathology, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
- Biosystematics Group, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Yuling Bai
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
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Boyers D, Retat L, Jacobsen E, Avenell A, Aveyard P, Corbould E, Jaccard A, Cooper D, Robertson C, Aceves-Martins M, Xu B, Skea Z, de Bruin M. Cost-effectiveness of bariatric surgery and non-surgical weight management programmes for adults with severe obesity: a decision analysis model. Int J Obes (Lond) 2021; 45:2179-2190. [PMID: 34088970 PMCID: PMC8455321 DOI: 10.1038/s41366-021-00849-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 04/21/2021] [Accepted: 04/27/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVES To determine the most cost-effective weight management programmes (WMPs) for adults, in England with severe obesity (BMI ≥ 35 kg/m2), who are more at risk of obesity related diseases. METHODS An economic evaluation of five different WMPs: 1) low intensity (WMP1); 2) very low calorie diets (VLCD) added to WMP1; 3) moderate intensity (WMP2); 4) high intensity (Look AHEAD); and 5) Roux-en-Y gastric bypass (RYGB) surgery, all compared to a baseline scenario representing no WMP. We also compare a VLCD added to WMP1 vs. WMP1 alone. A microsimulation decision analysis model was used to extrapolate the impact of changes in BMI, obtained from a systematic review and meta-analysis of randomised controlled trials (RCTs) of WMPs and bariatric surgery, on long-term risks of obesity related disease, costs, quality adjusted life years (QALYs) and incremental cost-effectiveness ratios (ICERs) measured as incremental cost per QALY gained over a 30-year time horizon from a UK National Health Service (NHS) perspective. Sensitivity analyses explored the impact of long-term weight regain assumptions on results. RESULTS RYGB was the most costly intervention but also generated the lowest incidence of obesity related disease and hence the highest QALY gains. Base case ICERs for WMP1, a VLCD added to WMP1, WMP2, Look AHEAD, and RYGB compared to no WMP were £557, £6628, £1540, £23,725 and £10,126 per QALY gained respectively. Adding a VLCD to WMP1 generated an ICER of over £121,000 per QALY compared to WMP1 alone. Sensitivity analysis found that all ICERs were sensitive to the modelled base case, five year post intervention cessation, weight regain assumption. CONCLUSIONS RYGB surgery was the most effective and cost-effective use of scarce NHS funding resources. However, where fixed healthcare budgets or patient preferences exclude surgery as an option, a standard 12 week behavioural WMP (WMP1) was the next most cost-effective intervention.
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Affiliation(s)
- D Boyers
- Health Economics Research Unit, University of Aberdeen, Aberdeen, UK.
| | | | - E Jacobsen
- Health Economics Research Unit, University of Aberdeen, Aberdeen, UK
| | - A Avenell
- Health Services Research Unit, University of Aberdeen, Aberdeen, UK
| | - P Aveyard
- Nuffield Department of Primary Care Health Sciences, Oxford University, Oxford, UK
- NIHR Oxford Biomedical Research Centre (BRC) Obesity, Diet and Lifestyle Theme, Oxford, UK
- NIHR Applied Research Collaboration (ARC) Oxford and Thames Valley, Oxford, UK
| | | | | | - D Cooper
- Health Services Research Unit, University of Aberdeen, Aberdeen, UK
| | - C Robertson
- Health Services Research Unit, University of Aberdeen, Aberdeen, UK
| | - M Aceves-Martins
- Health Services Research Unit, University of Aberdeen, Aberdeen, UK
| | - B Xu
- UK Health Forum, London, UK
| | - Z Skea
- Health Services Research Unit, University of Aberdeen, Aberdeen, UK
| | - M de Bruin
- Health Psychology, University of Aberdeen, Aberdeen, UK
- Radboud University Medical Center, Radboud Institute for Health Sciences, IQ Healthcare, Nijmegen, The Netherlands
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7
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Abramson JS, Bengston EM, Redd R, Barnes JA, Takvorian T, Sokol L, Lansigan F, Armand P, Shah B, Jacobsen E, Martignetti R, Turba E, Metzler SR, Patterson V, LaCasce AS, Bello CM. MATURE RESULTS FROM A PHASE II TRIAL OF BRENTUXIMAB VEDOTIN PLUS ADRIAMYCIN AND DACARBAZINE WITHOUT RADIATION IN NON‐BULKY LIMITED STAGE CLASSICAL HODGKIN LYMPHOMA. Hematol Oncol 2021. [DOI: 10.1002/hon.110_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- J. S. Abramson
- Massachusetts General Hospital Center for Lymphoma Boston Massachusetts USA
| | - E. M. Bengston
- Dartmouth‐Hitchcock Medical Center Hematology/Oncology Lebanon New Hampshire USA
| | - R. Redd
- Dana‐Farber Cancer Institute Biostatistics Boston Massachusetts USA
| | - J. A. Barnes
- Massachusetts General Hospital Center for Lymphoma Boston Massachusetts USA
| | - T. Takvorian
- Massachusetts General Hospital Center for Lymphoma Boston Massachusetts USA
| | - L. Sokol
- Moffitt Cancer Center Hematology/Oncology Tampa USA
| | - F. Lansigan
- Dartmouth‐Hitchcock Medical Center Hematology/Oncology Lebanon New Hampshire USA
| | - P. Armand
- Dana‐Farber Cancer Institute Medical Oncology Boston USA
| | - B. Shah
- Moffitt Cancer Center Hematology/Oncology Tampa USA
| | - E. Jacobsen
- Dana‐Farber Cancer Institute Medical Oncology Boston USA
| | - R. Martignetti
- Massachusetts General Hospital Center for Lymphoma Boston Massachusetts USA
| | - E. Turba
- Moffitt Cancer Center Hematology/Oncology Tampa USA
| | - S. R. Metzler
- Dartmouth‐Hitchcock Medical Center Hematology/Oncology Lebanon New Hampshire USA
| | - V. Patterson
- Dana‐Farber Cancer Institute Medical Oncology Boston USA
| | - A. S. LaCasce
- Dana‐Farber Cancer Institute Medical Oncology Boston USA
| | - C. M. Bello
- Moffitt Cancer Center Hematology/Oncology Tampa USA
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8
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Wang M, Rule S, Zinzani PL, Goy A, Casasnovas O, Smith SD, Damaj G, Doorduijn JK, Lamy T, Morschhauser F, Panizo C, Shah B, Davies A, Eek R, Dupuis J, Jacobsen E, Kater AP, Gouill S, Oberic L, Robak T, Jain P, Calvo R, Tao L, Dlugosz‐Danecka M. ACALABRUTINIB MONOTHERAPY IN PATIENTS WITH RELAPSED/REFRACTORY MANTLE CELL LYMPHOMA: FINAL RESULTS FROM A PHASE 2 STUDY. Hematol Oncol 2021. [DOI: 10.1002/hon.58_2880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. Wang
- MD Anderson Cancer Center, University of Texas Lymphoma ‐ Myeloma, Division of Cancer Medicine Houston Texas USA
| | - S. Rule
- Plymouth University Medical School Hematology Plymouth UK
| | - P. L. Zinzani
- Institute of Hematology “Seràgnoli” University of Bologna Experimental, Diagnostic and Specialty Medicine ‐ DIMES Bologna Italy
| | - A. Goy
- John Theurer Cancer Center, Hackensack University Medical Center Oncology Hackensack New Jersey USA
| | - O. Casasnovas
- CHU Dijon ‐ Hôpital d’Enfants Hematology Dijon France
| | - S. D. Smith
- Fred Hutchinson Cancer Research Center, University of Washington Medical Oncology Seattle Washington USA
| | - G. Damaj
- Institut d’Hématologie de Basse‐Normandie Hematology Caen France
| | - J. K. Doorduijn
- Erasmus MC, HOVON Lunenburg Lymphoma Phase I/II Consortium Hematology Rotterdam Netherlands
| | - T. Lamy
- CHU de Rennes Hematology Rennes France
| | - F. Morschhauser
- CHU Lille, ULR 7365 ‐ GRITA ‐ Groupe de Recherche sur les formes Injectables et les Technologies Associées Hematology Lille France
| | - C. Panizo
- Clínica Universidad de Navarra Hematology Pamplona Spain
| | - B. Shah
- Moffitt Cancer Center Malignant Hematology Tampa Florida USA
| | - A. Davies
- Cancer Research UK Experimental Cancer Medicines Centre, University of Southampton Faculty of Medicine Medical Oncology Southampton UK
| | - R. Eek
- Border Medical Oncology Medical Oncology Albury Australia
| | - J. Dupuis
- Unité Hémopathies Lymphoïdes AP‐HP Hôpital Henri Mondor, Hematology Créteil France
| | - E. Jacobsen
- Dana Farber Cancer Institute Harvard Medical School, Medical Oncology Boston Massachusetts USA
| | - A. P. Kater
- Amsterdam University Medical Center Amsterdam, on behalf of Hovon, Hematology, Lymphoma and Myeloma Research Amsterdam Netherlands
| | - S. Gouill
- CHU de Nantes—Hotel Dieu Hematology Nantes France
| | - L. Oberic
- Institut Universitaire du Cancer—Oncopole Toulouse (IUCT‐O) Hematology Toulouse France
| | - T. Robak
- Copernicus Memorial Hospital, Medical University of Lodz Hematology Lodz Poland
| | - P. Jain
- MD Anderson Cancer Center, University of Texas Leukemia Houston Texas USA
| | - R. Calvo
- AstraZeneca, Clinical Development Hematology R&D Oncology Gaithersburg Maryland USA
| | - L. Tao
- AstraZeneca Biostatistics South San Francisco California USA
| | - M. Dlugosz‐Danecka
- Maria Sklodowska‐Curie National Research Institute of Oncology Hematology Krakow Poland
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Bagot M, Kim Y, Zinzani PL, Dalle S, Beylot‐barry M, Ortiz‐Romero PL, Cambalia A, Dereure O, Mortier L, Jacobsen E, Rotolo F, Azim HA, Porcu P. LACUTAMAB IN PATIENTS (PTS) WITH ADVANCED MYCOSIS FUNGOIDES (MF) ACCORDING TO KIR3DL2 EXPRESSION: EARLY RESULTS FROM THE TELLOMAK PHASE 2 TRIAL. Hematol Oncol 2021. [DOI: 10.1002/hon.54_2879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M. Bagot
- Hopital St Louis Dermatology Paris France
| | - Y. Kim
- Stanford Cancer Center Dermatology San Francisco USA
| | - P. L. Zinzani
- Policlinico S Orsola‐Malpighi Oncology Hematology Bologna Italy
| | - S. Dalle
- Hospices Civils de Lyon Dermatology Lyon France
| | - M. Beylot‐barry
- Centre Hospitalier Universitaire de Bordeaux ‐ Hôpital Saint‐Andre Dermatology Bordeaux France
| | | | - A. Cambalia
- Hospital Clínic de Barcelona Dermatology Barcelona Spain
| | - O. Dereure
- CHU Montpellier Dermatology Montpellier France
| | - L. Mortier
- CHRU de Lille ‐ Hôpital Claude Huriez Dermatology Lille France
| | - E. Jacobsen
- Dana‐Farber Cancer Institute Oncology Hematology Boston USA
| | - F. Rotolo
- Innate Pharma Clinical Affaires Marseille France
| | - H. A Azim
- Innate Pharma Clinical Development Marseille France
| | - P. Porcu
- Thomas Jefferson University Hematology Oncology Philadelphia USA
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10
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Bui A, Canales AL, Jacobsen E, LeBoeuf N. 444 Cutaneous langerhans cell histiocytosis in adults: Clinical features, disease course, and management among patients treated at the Dana-Farber Cancer Institute between 2003-2017. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Santillán Martínez MI, Bracuto V, Koseoglou E, Appiano M, Jacobsen E, Visser RGF, Wolters AMA, Bai Y. CRISPR/Cas9-targeted mutagenesis of the tomato susceptibility gene PMR4 for resistance against powdery mildew. BMC Plant Biol 2020; 20:284. [PMID: 32560695 PMCID: PMC7304142 DOI: 10.1186/s12870-020-02497-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 06/15/2020] [Indexed: 05/18/2023]
Abstract
BACKGROUND The development of CRISPR/Cas9 technology has facilitated targeted mutagenesis in an efficient and precise way. Previously, RNAi silencing of the susceptibility (S) gene PowderyMildewResistance 4 (PMR4) in tomato has been shown to enhance resistance against the powdery mildew pathogen Oidium neolycopersici (On). RESULTS To study whether full knock-out of the tomato PMR4 gene would result in a higher level of resistance than in the RNAi-silenced transgenic plants we generated tomato PMR4 CRISPR mutants. We used a CRISPR/Cas9 construct containing four single-guide RNAs (sgRNAs) targeting the tomato PMR4 gene to increase the possibility of large deletions in the mutants. After PCR-based selection and sequencing of transformants, we identified five different mutation events, including deletions from 4 to 900-bp, a 1-bp insertion and a 892-bp inversion. These mutants all showed reduced susceptibility to On based on visual scoring of disease symptoms and quantification of relative fungal biomass. Histological observations revealed a significantly higher occurrence of hypersensitive response-like cell death at sites of fungal infection in the pmr4 mutants compared to wild-type plants. Both haustorial formation and hyphal growth were diminished but not completely inhibited in the mutants. CONCLUSION CRISPR/Cas-9 targeted mutagenesis of the tomato PMR4 gene resulted in mutants with reduced but not complete loss of susceptibility to the PM pathogen On. Our study demonstrates the efficiency and versatility of the CRISPR/Cas9 system as a powerful tool to study and characterize S-genes by generating different types of mutations.
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Affiliation(s)
- Miguel I Santillán Martínez
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Valentina Bracuto
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Eleni Koseoglou
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Michela Appiano
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Evert Jacobsen
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Richard G F Visser
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Anne-Marie A Wolters
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands
| | - Yuling Bai
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708, PB, Wageningen, The Netherlands.
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12
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Nikiforow S, King B, Garrity H, Rosati C, Wood A, Nolan M, Smith S, Powers M, Albert C, Stasko K, Schott D, Kelley M, Sturtevant O, Jacobsen E, Ritz J, Lehmann L. Donor risk factors and recipient clinical impact of positive microbial contamination after bone marrow harvests - a large academic medical center experience. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Witzig T, Sokol L, Kim W, Foss F, Jacobsen E, de la Cruz Vincente F, Caballero D, Advani R, Roncero Vidal J, Marin-Niebla A, Rodriguez Izquierdo A, de Ona Navarrete R, Terol M, Domingo-Domenech E, Rodriguez M, Piris M, Bolognese J, Janes M, Burrows F, Kessler L, Mishra V, Curry R, Kurman M, Scholz C, Gualberto A. TIPIFARNIB IN RELAPSED OR REFRACTORY ANGIOIMMUNOBLASTIC T-CELL LYMPHOMA (AITL) AND CXCL12+ PERIPHERAL T-CELL LYMPHOMA (PTCL): PRELIMINARY RESULTS FROM A PHASE 2 STUDY. Hematol Oncol 2019. [DOI: 10.1002/hon.32_2629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T. Witzig
- Laboratory Medicine and Pathology; Mayo Clinic; Rochester United States
| | - L. Sokol
- Hematology; H. Lee Moffitt Cancer Center & Research Institute; Tampa FL United States
| | - W. Kim
- Hematology - Oncology; Samsung Medical Center; Seoul Republic of Korea
| | - F. Foss
- Medical Oncology; Yale University School of Medicine; New Haven United States
| | - E. Jacobsen
- Medical Oncology; Dana-Farber Cancer Institute; Boston United States
| | | | - D. Caballero
- Hematology - Oncology; Hospital Universitario de Salamanca; Salamanca Spain
| | - R. Advani
- Medicine - Med/Oncology; Stanford University Medical Center; Palo Alto United States
| | | | - A. Marin-Niebla
- Hematology - Oncology; Vall D'Hebron Institute of Oncology; Barcelona Spain
| | | | | | - M.J. Terol
- Hematology; Hospital Clinico Universitario de Valencia; València Spain
| | | | | | - M.A. Piris
- Pathology; Fundación Jiménez Díaz; Madrid Spain
| | | | - M.R. Janes
- Biology; Wellspring Biosciences, Inc.; San Diego United States
| | - F. Burrows
- Research; Kura Oncology, Inc.; San Diego United States
| | - L. Kessler
- Development; Kura Oncology, Inc.; San Diego United States
| | - V. Mishra
- Development; Kura Oncology, Inc.; San Diego United States
| | - R. Curry
- Development; Kura Oncology, Inc.; Cambridge United States
| | - M. Kurman
- Development; Kura Oncology, Inc.; Cambridge United States
| | - C. Scholz
- Development; Kura Oncology, Inc.; Cambridge United States
| | - A. Gualberto
- Development; Kura Oncology, Inc.; Cambridge United States
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14
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Jagadeesh D, Horwitz S, Bartlett N, Advani R, Jacobsen E, Duvic M, Gautman A, Rao S, Onsum M, Fanale M, Kim Y. RESPONSE TO BRENTUXIMAB VEDOTIN BY CD30 EXPRESSION: RESULTS FROM FIVE TRIALS IN PTCL, CTCL, AND B-CELL LYMPHOMAS. Hematol Oncol 2019. [DOI: 10.1002/hon.149_2631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- D. Jagadeesh
- Hematology and Medical Oncology; Cleveland Clinic; Cleveland United States
| | - S. Horwitz
- Department of Medicine; Lymphoma Service, Memorial Sloan Kettering Cancer Center; New York United States
| | - N.L. Bartlett
- Department of Medicine; Oncology Division, Washington University School of Medicine, Siteman Cancer Center; Saint Louis United States
| | - R. Advani
- Medicine-Med/Oncology; Stanford Cancer Institute; Stanford United States
| | - E. Jacobsen
- Division of Hematologic Malignancies; Dana-Farber Cancer Institute; Boston United States
| | - M. Duvic
- Department of Dermatology; The University of Texas MD Anderson Cancer Center; Houston United States
| | - A. Gautman
- Clinical Development; Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceuticals Limited; Cambridge United States
| | - S. Rao
- Development; Seattle Genetics, Inc.; Bothell United States
| | - M. Onsum
- Development; Seattle Genetics, Inc.; Bothell United States
| | - M. Fanale
- Development; Seattle Genetics, Inc.; Bothell United States
| | - Y. Kim
- Department of Dermatology; Stanford University School of Medicine; Stanford United States
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15
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Jacobsen E, Ďuraš J, Ardeshna K, Cherry M, Offner F, Mayer J, Bijou F, Tani M, Musuraca G, Merli M, Marasca R, Weaver D, Lustgarten S, Youssoufian H, Zinzani P. CHARACTERIZATION OF DUVELISIB IN PATIENTS WITH REFRACTORY MARGINAL ZONE LYMPHOMA: DATA FROM THE PHASE 2 DYNAMO TRIAL. Hematol Oncol 2019. [DOI: 10.1002/hon.70_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- E. Jacobsen
- Department of Medical Oncology; Dana-Farber Cancer Institute; Boston MA United States
| | - J. Ďuraš
- University Hospital Ostrava and Faculty of Medicine; University Hospital Ostrava; Ostrava Czech Republic
| | - K. Ardeshna
- Department of Oncology; University College London Hospitals National Health Service Foundation Trust; London United Kingdom
| | - M. Cherry
- Department of Medical Oncology; Atlantic Health Systems; Morristown NJ United States
| | - F. Offner
- Department of Hematology; University Hospital Ghent; Gent Belgium
| | - J. Mayer
- Department of Internal Medicine; Fakultní Nemocnice Brno; Brno Czech Republic
| | - F. Bijou
- Department of Medical Oncology; Institut Bergonie; Boredeaux France
| | - M. Tani
- Hematology Unit; Santa Maria delle Croci Hospital; Ravenna Italy
| | - G. Musuraca
- Hematology Unit; Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori; Meldola Italy
| | - M. Merli
- Department of Hematology; Ospedale di Circolo e Fondazione Macchi; Varese Italy
| | - R. Marasca
- Department of Medical Sciences; Section of Hematology, Università di Modena e Reggio Emilia; Modena Italy
| | - D.T. Weaver
- Medical Affairs; Verastem Oncology; Needham MA United States
| | - S. Lustgarten
- Medical Affairs; Verastem Oncology; Needham MA United States
| | - H. Youssoufian
- Medical Affairs; Verastem Oncology; Needham MA United States
| | - P. Zinzani
- Institute of Hematology “L. e A. Seràgnoli”; University of Bologna; Bologna Italy
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16
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Horwitz S, Foss F, Porcu P, Moskowitz A, Mehta-Shah N, Jacobsen E, Khodadoust M, Kim Y, Weinstock D, Lustgarten S, Baglio M, Youssoufian H, Brammer J. Duvelisib, an oral dual PI3K-δ,γ inhibitor, efficacy and safety in patients with relapsed or refractory (RR) peripheral T-cell lymphoma: rationale for the phase 2 PRIMO trial. Hematol Oncol 2019. [DOI: 10.1002/hon.33_2629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- S.M. Horwitz
- Memorial Sloan Kettering Cancer Center; New York NY United States
| | - F.M. Foss
- Yale Cancer Center; New Haven CT United States
| | - P. Porcu
- Sidney Kimmel Cancer Center; Thomas Jefferson University; Philadelphia PA United States
| | - A. Moskowitz
- Memorial Sloan Kettering Cancer Center; New York NY United States
| | - N. Mehta-Shah
- Washington University Medical School; St. Louis MO United States
| | - E. Jacobsen
- Stanford Cancer Institute/School of Medicine; Stanford CA United States
| | - M.S. Khodadoust
- Stanford Cancer Institute/School of Medicine; Stanford CA United States
| | - Y.H. Kim
- Stanford Cancer Institute/School of Medicine; Stanford CA United States
| | - D. Weinstock
- Dana-Farber Cancer Institute; Boston MA United States
| | | | - M. Baglio
- Verastem Oncology, Inc; Needham MA United States
| | | | - J. Brammer
- Ohio State University; Columbus OH United States
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17
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Illidge T, Horwitz S, Iyer S, Bartlett N, Kim W, Tilly H, Belada D, Feldman T, Illés Á, Jacobsen E, Hüttmann A, Zinzani P, O'Connor O, Trepicchio W, Miao H, Rao S, Onsum M, Manley T, Advani R. RESPONSE TO A+CHP BY CD30 EXPRESSION IN THE ECHELON-2 TRIAL. Hematol Oncol 2019. [DOI: 10.1002/hon.92_2630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- T. Illidge
- Division of Cancer Sciences, Faculty of Biology, Medicine and Health; University of Manchester, National Institutes of Health and Research Biomedical Research Centre, Manchester Academic Health Sciences Centre, Christie Hospital National Health Service Foundation Trust; Manchester United Kingdom
| | - S. Horwitz
- Department of Medicine; Lymphoma Service, Memorial Sloan Kettering Cancer Center; New York United States
| | - S. Iyer
- Department of Lymphoma and Myeloma; Division of Cancer Medicine, MD Anderson Cancer Center; Houston United States
| | - N. Bartlett
- Department of Medicine; Oncology Division, Washington University School of Medicine, Siteman Cancer Center; Saint Louis United States
| | - W. Kim
- Division of Hematology-Oncology; Department of Medicine, Samsung Medical Center; Seoul Republic of Korea
| | - H. Tilly
- Department of Hematology; Centre Henri Becquerel, Université of Rouen Normandie; Rouen France
| | - D. Belada
- 4th Department of Internal Medicine - Haematology; Charles University, Hospital and Faculty of Medicine; Hradec Králové Czech Republic
| | - T. Feldman
- Hematology Division; Hackensack University Medical Center; Hackensack United States
| | - Á. Illés
- Department of Hematology; University of Debrecen, Faculty of Medicine; Debrecen Hungary
| | - E. Jacobsen
- Division of Hematologic Malignancies; Dana-Farber Cancer Institute; Boston United States
| | - A. Hüttmann
- Department of Haematology; Universitatsklinikum Essen; Essen Germany
| | - P. Zinzani
- Institute of Hematology; “Seràgnoli” University of Bologna; Bologna France
| | - O.A. O'Connor
- Department of Medicine; Columbia University Medical Center; New York United States
| | - W. Trepicchio
- Clinical Development; Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceuticals Limited; Cambridge United States
| | - H. Miao
- Clinical Development; Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceuticals Limited; Cambridge United States
| | - S. Rao
- Development; Seattle Genetics, Inc.; Bothell United States
| | - M. Onsum
- Development; Seattle Genetics, Inc.; Bothell United States
| | - T. Manley
- Development; Seattle Genetics, Inc.; Bothell United States
| | - R. Advani
- Medicine - Med/Oncology; Stanford Cancer Institute; Stanford United States
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18
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Hughes T, Rosano C, Beer J, Jacobsen E, Ganguli M. INFLUENCE OF COGNITION ON CHANGE IN PHYSICAL AND EVERYDAY FUNCTION AMONG INCIDENT FALLERS: THE MYHAT STUDY. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- T Hughes
- Youngstown State University, Beaver, Pennsylvania, United States
| | - C Rosano
- University of Pittsburgh, Pittsburgh, PA
| | - J Beer
- University of Pittsburgh, Pittsburgh, PA, USA
| | - E Jacobsen
- University of Pittsburgh, Pittsburgh, PA, USA
| | - M Ganguli
- University of Pittsburgh, Pittsburgh, PA, USA
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19
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Sun K, van Tuinen A, van Kan JAL, Wolters AMA, Jacobsen E, Visser RGF, Bai Y. Silencing of DND1 in potato and tomato impedes conidial germination, attachment and hyphal growth of Botrytis cinerea. BMC Plant Biol 2017; 17:235. [PMID: 29212470 PMCID: PMC5719932 DOI: 10.1186/s12870-017-1184-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 11/22/2017] [Indexed: 05/08/2023]
Abstract
BACKGROUND Botrytis cinerea, a necrotrophic pathogenic fungus, attacks many crops including potato and tomato. Major genes for complete resistance to B. cinerea are not known in plants, but a few quantitative trait loci have been described in tomato. Loss of function of particular susceptibility (S) genes appears to provide a new source of resistance to B. cinerea in Arabidopsis. RESULTS In this study, orthologs of Arabidopsis S genes (DND1, DMR6, DMR1 and PMR4) were silenced by RNAi in potato and tomato (only for DND1). DND1 well-silenced potato and tomato plants showed significantly reduced diameters of B. cinerea lesions as compared to control plants, at all-time points analysed. Reduced lesion diameter was also observed on leaves of DMR6 silenced potato plants but only at 3 days post inoculation (dpi). The DMR1 and PMR4 silenced potato transformants were as susceptible as the control cv Desiree. Microscopic analysis was performed to observe B. cinerea infection progress in DND1 well-silenced potato and tomato leaves. A significantly lower number of B. cinerea conidia remained attached to the leaf surface of DND1 well-silenced potato and tomato plants and the hyphal growth of germlings was hampered. CONCLUSIONS This is the first report of a cytological investigation of Botrytis development on DND1-silenced crop plants. Silencing of DND1 led to reduced susceptibility to Botrytis, which was associated with impediment of conidial germination and attachment as well as hyphal growth. Our results provide new insights regarding the use of S genes in resistance breeding.
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Affiliation(s)
- Kaile Sun
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Ageeth van Tuinen
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Jan A. L. van Kan
- Laboratory of Phytopathology, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Anne-Marie A. Wolters
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Evert Jacobsen
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Richard G. F. Visser
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Yuling Bai
- Plant Breeding, Wageningen University & Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
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20
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Payton M, Pinchasik D, Mehta A, Goel S, Zain J, Sokol L, Jacobsen E, Patel M, Horwitz S, Meric-Bernstam F, Shustov A, Weinstock D, Aivado M, Annis D. Phase 2a study of a novel stapled peptide ALRN-6924 disrupting MDMX- and MDM2-mediated inhibition of wild-type TP53 in patients with peripheral t-cell lymphoma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx373.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Zinzani P, Wagner-Johnston N, Miller C, Ardeshna K, Tertreault S, Assouline S, Mayer J, Passamonti F, Lunin S, Pettitt A, Nagy Z, Tournilhac O, Abou-Nassar K, Crump M, Jacobsen E, De Vos S, Youssoufian H, Porter J, Prado S, Flinn I. DYNAMO: a PHASE 2 STUDY DEMONSTRATING THE CLINICAL ACTIVITY OF DUVELISIB IN PATIENTS WITH DOUBLE-REFRACTORY INDOLENT NON-HODGKIN LYMPHOMA. Hematol Oncol 2017. [DOI: 10.1002/hon.2437_57] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- P. Zinzani
- Institute of Hematology Serágnoli; University of Bologna; Bologna Italy
| | | | - C. Miller
- Cancer Institute; St. Agnes Hospital; Baltimore USA
| | - K. Ardeshna
- Cancer Center; University College London; London UK
| | - S. Tertreault
- Department of Hematology; Florida Cancer Specialists Tallahassee; Tallahassee USA
| | - S. Assouline
- Division of Hematology; Jewish General Hospital; Montreal Canada
| | - J. Mayer
- Interni hematologicka; Onkologicka klinika-FN Brno; Brno Czech Republic
| | - F. Passamonti
- Oncology; Ospedale Di Circolo e Fondazione Macchi U.O. Ematologia; Varese Italy
| | - S. Lunin
- Hematology/Oncology; Florida Cancer Specialist Sarasotta; Sarasotta USA
| | - A. Pettitt
- Department of Molecular and Clinical Cancer Medicine, North West Cancer Research Centre; University of Liverpool; Liverpool UK
| | - Z. Nagy
- Belgyogyaszati Klinika; Semmelweis Egyetem, I. sz; Budapest Hungary
| | - O. Tournilhac
- Service d'hématologie; CHU Estaing; Clermont-Ferrand France
| | - K. Abou-Nassar
- Hematology; Centre intégré de santé et de services sociaux de l'Outaouais; Gatineau Canada
| | - M. Crump
- Hematology; Princess Margaret Cancer Center; Toronto Canada
| | - E. Jacobsen
- Hematology and Oncology; Beth Israel Deaconess Medical Center; Boston USA
| | - S. De Vos
- Hematology and Oncology; Ronald Reagan UCLA Medical Center; Los Angeles USA
| | | | - J. Porter
- Clinical Development; Verastem Inc.; Needham USA
| | - S. Prado
- Clinical Development; Verastem Inc.; Needham USA
| | - I. Flinn
- Hematology and Oncology; Sarah Cannon Research Institute; Nashville USA
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22
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Witzig T, Sokol L, Jacobsen E, Advani R, Mondejar R, Piris M, Burrows F, Melvin C, Mishra V, Scholz C, Gualberto A. PRELIMINARY RESULTS FROM AN OPEN-LABEL, PHASE II STUDY OF TIPIFARNIB IN RELAPSED OR REFRACTORY PERIPHERAL T-CELL LYMPHOMA. Hematol Oncol 2017. [DOI: 10.1002/hon.2438_115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- T. Witzig
- Laboratory Medicine and Pathology; Mayo Clinic; Rochester USA
| | - L. Sokol
- Medical Oncology; H. Lee Moffitt Cancer Center & Research Institute; Tampa USA
| | - E. Jacobsen
- Medical Oncology; Dana Farber Cancer Institute; Boston USA
| | - R. Advani
- Medicine - Med/Oncology; Stanford Cancer Institute; Palo Alto USA
| | - R. Mondejar
- Laboratorio de Genómica del Cáncer, IDIVAL-Instituto de Investigación Marqués de Valdecilla; Santander Spain
| | - M. Piris
- Pathology Service, Fundación Jiménez Díaz; Madrid Spain
| | - F. Burrows
- Research & Development; Kura Oncology; La Jolla USA
| | - C. Melvin
- Research & Development; Kura Oncology; La Jolla USA
| | - V. Mishra
- Research & Development; Kura Oncology; La Jolla USA
| | - C. Scholz
- Research & Development; Kura Oncology; La Jolla USA
| | - A. Gualberto
- Research & Development; Kura Oncology; La Jolla USA
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23
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Vossen JH, van Arkel G, Bergervoet M, Jo KR, Jacobsen E, Visser RGF. The Solanum demissum R8 late blight resistance gene is an Sw-5 homologue that has been deployed worldwide in late blight resistant varieties. Theor Appl Genet 2016; 129:1785-96. [PMID: 27314264 PMCID: PMC4983296 DOI: 10.1007/s00122-016-2740-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/04/2016] [Indexed: 05/22/2023]
Abstract
The potato late blight resistance gene R8 has been cloned. R8 is found in five late blight resistant varieties deployed in three different continents. R8 recognises Avr8 and is homologous to the NB-LRR protein Sw-5 from tomato. The broad spectrum late blight resistance gene R8 from Solanum demissum was cloned based on a previously published coarse map position on the lower arm of chromosome IX. Fine mapping in a recombinant population and bacterial artificial chromosome (BAC) library screening resulted in a BAC contig spanning 170 kb of the R8 haplotype. Sequencing revealed a cluster of at least ten R gene analogues (RGAs). The seven RGAs in the genetic window were subcloned for complementation analysis. Only one RGA provided late blight resistance and caused recognition of Avr8. From these results, it was concluded that the newly cloned resistance gene was indeed R8. R8 encodes a typical intracellular immune receptor with an N-terminal coiled coil, a central nucleotide binding site and 13 C-terminal leucine rich repeats. Phylogenetic analysis of a set of representative Solanaceae R proteins shows that R8 resides in a clearly distinct clade together with the Sw-5 tospovirus R protein from tomato. It was found that the R8 gene is present in late blight resistant potato varieties from Europe (Sarpo Mira), USA (Jacqueline Lee, Missaukee) and China (PB-06, S-60). Indeed, when tested under field conditions, R8 transgenic potato plants showed broad spectrum resistance to the current late blight population in the Netherlands, similar to Sarpo Mira.
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Affiliation(s)
- Jack H Vossen
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands.
| | - Gert van Arkel
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Marjan Bergervoet
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Kwang-Ryong Jo
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Richard G F Visser
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
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24
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Abstract
Posttraumatic osteolysis (PO) of the os pubis is a diagnostic entity characterized at radiography by rapidly progressing destructive changes in fractures of the pubic body or rami. Fourteen patients with PO are here reported of whom in 8 the radiographic course of the condition was followed. They were all post-menopausal women and 7 were predisposed to osteopenia. The primary fractures were related to mild trauma in 7 patients and 7 had insufficiency fractures. Four patients had bilateral symmetrical PO. All 14 patients had concomitant insufficiency fractures of the sacrum observed at radiography, CT, scintigraphy or MR, probably due to pelvic instability caused by the PO of the os pubis. Symptoms of the sacral fractures usually dominated the clinical condition. Bony healing of the PO did not occur in any of the patients, but in all 8 patients followed radiographically, the fractures of the sacrum healed clinically and at CT. Knowledge about the condition is important to avoid unnecessary biopsy of the PO considered a metastatic lesion and/or extensive diagnostic search for a primary tumor.
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25
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Schulz R, Thomas E, Popple R, Fiveash J, Jacobsen E. SU-F-E-07: Web-Based Training for Radiosurgery: Methods and Metrics for Global Reach. Med Phys 2016. [DOI: 10.1118/1.4955693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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26
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Sun K, Wolters AMA, Vossen JH, Rouwet ME, Loonen AEHM, Jacobsen E, Visser RGF, Bai Y. Silencing of six susceptibility genes results in potato late blight resistance. Transgenic Res 2016; 25:731-42. [PMID: 27233778 PMCID: PMC5023794 DOI: 10.1007/s11248-016-9964-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/21/2016] [Indexed: 01/01/2023]
Abstract
Phytophthora infestans, the causal agent of late blight, is a major threat to commercial potato production worldwide. Significant costs are required for crop protection to secure yield. Many dominant genes for resistance (R-genes) to potato late blight have been identified, and some of these R-genes have been applied in potato breeding. However, the P. infestans population rapidly accumulates new virulent strains that render R-genes ineffective. Here we introduce a new class of resistance which is based on the loss-of-function of a susceptibility gene (S-gene) encoding a product exploited by pathogens during infection and colonization. Impaired S-genes primarily result in recessive resistance traits in contrast to recognition-based resistance that is governed by dominant R-genes. In Arabidopsis thaliana, many S-genes have been detected in screens of mutant populations. In the present study, we selected 11 A. thalianaS-genes and silenced orthologous genes in the potato cultivar Desiree, which is highly susceptible to late blight. The silencing of five genes resulted in complete resistance to the P. infestans isolate Pic99189, and the silencing of a sixth S-gene resulted in reduced susceptibility. The application of S-genes to potato breeding for resistance to late blight is further discussed.
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Affiliation(s)
- Kaile Sun
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Anne-Marie A Wolters
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Jack H Vossen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Maarten E Rouwet
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Annelies E H M Loonen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Richard G F Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Yuling Bai
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands.
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Zhang Z, Mao L, Chen H, Bu F, Li G, Sun J, Li S, Sun H, Jiao C, Blakely R, Pan J, Cai R, Luo R, Van de Peer Y, Jacobsen E, Fei Z, Huang S. Genome-Wide Mapping of Structural Variations Reveals a Copy Number Variant That Determines Reproductive Morphology in Cucumber. Plant Cell 2015; 27:1595-604. [PMID: 26002866 PMCID: PMC4498199 DOI: 10.1105/tpc.114.135848] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 03/26/2015] [Accepted: 04/30/2015] [Indexed: 05/18/2023]
Abstract
Structural variations (SVs) represent a major source of genetic diversity. However, the functional impact and formation mechanisms of SVs in plant genomes remain largely unexplored. Here, we report a nucleotide-resolution SV map of cucumber (Cucumis sativas) that comprises 26,788 SVs based on deep resequencing of 115 diverse accessions. The largest proportion of cucumber SVs was formed through nonhomologous end-joining rearrangements, and the occurrence of SVs is closely associated with regions of high nucleotide diversity. These SVs affect the coding regions of 1676 genes, some of which are associated with cucumber domestication. Based on the map, we discovered a copy number variation (CNV) involving four genes that defines the Female (F) locus and gives rise to gynoecious cucumber plants, which bear only female flowers and set fruit at almost every node. The CNV arose from a recent 30.2-kb duplication at a meiotically unstable region, likely via microhomology-mediated break-induced replication. The SV set provides a snapshot of structural variations in plants and will serve as an important resource for exploring genes underlying key traits and for facilitating practical breeding in cucumber.
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Affiliation(s)
- Zhonghua Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China
| | - Linyong Mao
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853
| | - Huiming Chen
- Hunan Vegetable Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Fengjiao Bu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China Agricultural Genomic Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
| | - Guangcun Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Jinjing Sun
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China
| | - Shuai Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China
| | - Honghe Sun
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853
| | - Chen Jiao
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853
| | - Rachel Blakely
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853
| | - Junsong Pan
- Shanghai Jiaotong University, Shanghai 200240, China
| | - Run Cai
- Shanghai Jiaotong University, Shanghai 200240, China
| | - Ruibang Luo
- Department of Computer Science, University of Hong Kong, Hong Kong 999077, China
| | - Yves Van de Peer
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium Genomics Research Institute, University of Pretoria, Pretoria 0028, South Africa
| | - Evert Jacobsen
- Deparment of Plant Sciences, Laboratory of Plant Breeding, Wageningen University and Research Centre, 6700AA Wageningen, The Netherlands
| | - Zhangjun Fei
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 USDA-ARS Robert W. Holley Center for Agriculture and Health, Ithaca, New York 14853
| | - Sanwen Huang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing 100081, China Agricultural Genomic Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China
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Jo KR, Visser RGF, Jacobsen E, Vossen JH. Characterisation of the late blight resistance in potato differential MaR9 reveals a qualitative resistance gene, R9a, residing in a cluster of Tm-2 (2) homologs on chromosome IX. Theor Appl Genet 2015; 128:931-41. [PMID: 25725999 PMCID: PMC4544503 DOI: 10.1007/s00122-015-2480-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 02/09/2015] [Indexed: 05/03/2023]
Abstract
KEY MESSAGE The durable late blight resistance in potato plant Ma R9 is genetically characterized. A novel R -gene is mapped. The monogenic nature and map positions of R9 are negated and rectified. Late blight of potato (Solanum tuberosum), caused by Phytophthora infestans, can effectively be managed by genetic resistance. The MaR9 differential plant provides durable resistance to a broad spectrum of late blight strains. This resistance is brought about by at least seven genes derived from S. demissum including R1, Rpi-abpt1, R3a, R3b, R4, R8 and, so far uncharacterized resistance gene(s). Here we set out to genetically characterize this additional resistance in MaR9. Three BC1 populations derived from MaR9 were identified that segregated for IPO-C resistance but that lacked R8. One BC1 population showed a continuous scale of resistance phenotypes, suggesting that multiple quantitative resistance genes were segregating. In two other BC1 populations resistance and susceptibility were segregating in a 1:1 ratio, suggesting a single qualitative resistance gene (R9a). A chromosome IX PCR marker, 184-81, fully co-segregated with R9a. The map position of R9a on the distal end of the lower arm of chromosome IX was confirmed using PCR markers GP101 and Stm1021. Successively, cluster-directed profiling (CDP) was carried out, revealing six closely linked markers. CDP(Sw)58, CDP(Sw)59 and CDP(Sw5)10 flanked the R9a gene at the distal end (5.8 cM) and, as expected, were highly homologous to Sw-5. CDP(Tm2)2 flanked R9a on the proximal side (2.9 cM). CDP(Tm2)6 and CDP(Tm2)7 fully co-segregated with resistance and had high homology to Tm-2 (2) , showing that R9a resides in a cluster of NBS-LRR genes with homology to Tm-2 (2) . Besides R9a, additional resistance of quantitative nature is found in MaR9, which remains to be genetically characterized.
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Affiliation(s)
- Kwang-Ryong Jo
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
- Graduate School Experimental Plant Sciences, Wageningen, The Netherlands
| | - Richard G. F. Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Jack H. Vossen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
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Du J, Verzaux E, Chaparro-Garcia A, Bijsterbosch G, Keizer LCP, Zhou J, Liebrand TWH, Xie C, Govers F, Robatzek S, van der Vossen EAG, Jacobsen E, Visser RGF, Kamoun S, Vleeshouwers VGAA. Elicitin recognition confers enhanced resistance to Phytophthora infestans in potato. Nat Plants 2015; 1:15034. [PMID: 27247034 DOI: 10.1038/nplants.2015.34] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 02/26/2015] [Indexed: 05/20/2023]
Abstract
Potato late blight, caused by the destructive Irish famine pathogen Phytophthora infestans, is a major threat to global food security(1,2). All late blight resistance genes identified to date belong to the coiled-coil, nucleotide-binding, leucine-rich repeat class of intracellular immune receptors(3). However, virulent races of the pathogen quickly evolved to evade recognition by these cytoplasmic immune receptors(4). Here we demonstrate that the receptor-like protein ELR (elicitin response) from the wild potato Solanum microdontum mediates extracellular recognition of the elicitin domain, a molecular pattern that is conserved in Phytophthora species. ELR associates with the immune co-receptor BAK1/SERK3 and mediates broad-spectrum recognition of elicitin proteins from several Phytophthora species, including four diverse elicitins from P. infestans. Transfer of ELR into cultivated potato resulted in enhanced resistance to P. infestans. Pyramiding cell surface pattern recognition receptors with intracellular immune receptors could maximize the potential of generating a broader and potentially more durable resistance to this devastating plant pathogen.
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Affiliation(s)
- Juan Du
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
- Key Laboratory of Horticultural Plant Biology, Ministry of Education National Center for Vegetable Improvement (Central China); Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Estelle Verzaux
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | | | - Gerard Bijsterbosch
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | | | - Ji Zhou
- The Sainsbury Laboratory, Norwich Research Park, Norwich NR4 7UH, UK
| | - Thomas W H Liebrand
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | - Conghua Xie
- Key Laboratory of Horticultural Plant Biology, Ministry of Education National Center for Vegetable Improvement (Central China); Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Francine Govers
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | - Silke Robatzek
- The Sainsbury Laboratory, Norwich Research Park, Norwich NR4 7UH, UK
| | - Edwin A G van der Vossen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | - Richard G F Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
| | - Sophien Kamoun
- The Sainsbury Laboratory, Norwich Research Park, Norwich NR4 7UH, UK
| | - Vivianne G A A Vleeshouwers
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen 6708 PB, The Netherlands
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Jo KR, Kim CJ, Kim SJ, Kim TY, Bergervoet M, Jongsma MA, Visser RGF, Jacobsen E, Vossen JH. Development of late blight resistant potatoes by cisgene stacking. BMC Biotechnol 2014; 14:50. [PMID: 24885731 PMCID: PMC4075930 DOI: 10.1186/1472-6750-14-50] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 05/20/2014] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Phytophthora infestans, causing late blight in potato, remains one of the most devastating pathogens in potato production and late blight resistance is a top priority in potato breeding. The introduction of multiple resistance (R) genes with different spectra from crossable species into potato varieties is required. Cisgenesis is a promising approach that introduces native genes from the crops own gene pool using GM technology, thereby retaining favourable characteristics of established varieties. RESULTS We pursued a cisgenesis approach to introduce two broad spectrum potato late blight R genes, Rpi-sto1 and Rpi-vnt1.1 from the crossable species Solanum stoloniferum and Solanum venturii, respectively, into three different potato varieties. First, single R gene-containing transgenic plants were produced for all varieties to be used as references for the resistance levels and spectra to be expected in the respective genetic backgrounds. Next, a construct containing both cisgenic late blight R genes (Rpi-vnt1.1 and Rpi-sto1), but lacking the bacterial kanamycin resistance selection marker (NPTII) was transformed to the three selected potato varieties using Agrobacterium-mediated transformation. Gene transfer events were selected by PCR among regenerated shoots. Through further analyses involving morphological evaluations in the greenhouse, responsiveness to Avr genes and late blight resistance in detached leaf assays, the selection was narrowed down to eight independent events. These cisgenic events were selected because they showed broad spectrum late blight resistance due to the activity of both introduced R genes. The marker-free transformation was compared to kanamycin resistance assisted transformation in terms of T-DNA and vector backbone integration frequency. Also, differences in regeneration time and genotype dependency were evaluated. CONCLUSIONS We developed a marker-free transformation pipeline to select potato plants functionally expressing a stack of late blight R genes. Marker-free transformation is less genotype dependent and less prone to vector backbone integration as compared to marker-assisted transformation. Thereby, this study provides an important tool for the successful deployment of R genes in agriculture and contributes to the production of potentially durable late blight resistant potatoes.
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Affiliation(s)
- Kwang-Ryong Jo
- Wageningen UR Plant Breeding, Wageningen University & Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
- Graduate School Experimental Plant Sciences, Wageningen University, Wageningen, The Netherlands
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Chol-Jun Kim
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Sung-Jin Kim
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Tok-Yong Kim
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Marjan Bergervoet
- Wageningen UR Plant Breeding, Wageningen University & Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Maarten A Jongsma
- Plant Research International, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Richard GF Visser
- Wageningen UR Plant Breeding, Wageningen University & Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University & Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Jack H Vossen
- Wageningen UR Plant Breeding, Wageningen University & Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
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Grave K, Torren-Edo J, Muller A, Greko C, Moulin G, Mackay D, Fuchs K, Laurier L, Iliev D, Pokludova L, Genakritis M, Jacobsen E, Kurvits K, Kivilahti-Mantyla K, Wallmann J, Kovacs J, Lenharthsson JM, Beechinor JG, Perrella A, Mi ule G, Zymantaite U, Meijering A, Prokopiak D, Ponte MH, Svetlin A, Hederova J, Madero CM, Girma K, Eckford S. Variations in the sales and sales patterns of veterinary antimicrobial agents in 25 European countries. J Antimicrob Chemother 2014; 69:2284-91. [DOI: 10.1093/jac/dku106] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
Abstract
Plant breeding is a multidisciplinary scientific activity with tool development as driving force. It is clear from history that availability of genetic variation and selection methods are bottom lines for variety development. The genetic source of traditional plant breeding is restricted to domestication of traits from the so-called 'breeders' gene pool', consisting of crossable sources. Gene cloning and genetic transformation broaden the available genetic variation to genes from all living organisms. The so-called new genes in genetically modified organism (GMO) plants, consist of transgenes, with (chimaeric) genes from outside the 'breeder's gene pool'. Transgenic plants needed additional biosafety rules such as Directive 2001/18EC. However, these are not needed after transformation of the four rol-genes from wild-type Agrobacterium rhizogenes. In the meantime, cloned cisgenes, natural dominant genes from 'breeders' gene pool', are available, enabling cisgenic crops after marker-free transformation, which extends plant breeding with traditional traits. From long-term experience, it is clear that traditional breeding with the 'breeders' gene pool' has a history of safe use. Different scientific committees concluded that cisgenic crops are as safe as traditionally bred varieties. So, cisgenesis is a powerful new tool for plant breeding with traditional traits as indicated in the potential examples on: (1) breeding for durable resistance to potato late blight and apple scab by R-gene stacking; (2) the new possibility to come to stacking of monogenic resistance alleles in wheat; (3) engineering of restoration of cytoplasmic male sterility by cloned restorer genes and of altering gametophytic incompatibility by introducing additional S-alleles; (4) increasing phytase activity by gene dosage effect in barley; and (5) the possibility of changing hormone metabolism in (fruit) trees leading to important morphological alterations. In near future, because of availability of many more cisgenes, it is expected that the possibilities of cisgenesis will increase rapidly as the next step in plant breeding with traditional traits, if treatment as non-GMO is approved.
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Li Y, van der Lee TAJ, Evenhuis A, van den Bosch GBM, van Bekkum PJ, Förch MG, van Gent-Pelzer MPE, van Raaij HMG, Jacobsen E, Huang SW, Govers F, Vleeshouwers VGAA, Kessel GJT. Population dynamics of Phytophthora infestans in the Netherlands reveals expansion and spread of dominant clonal lineages and virulence in sexual offspring. G3 (Bethesda) 2012; 2:1529-40. [PMID: 23275876 PMCID: PMC3516475 DOI: 10.1534/g3.112.004150] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 09/22/2012] [Indexed: 11/18/2022]
Abstract
For a comprehensive survey of the structure and dynamics of the Dutch Phytophthora infestans population, 652 P. infestans isolates were collected from commercial potato fields in the Netherlands during the 10-year period 2000-2009. Genotyping was performed using 12 highly informative microsatellite markers and mitochondrial haplotypes. In addition, for each isolate, the mating type was determined. STRUCTURE analysis grouped the 322 identified genotypes in three clusters. Cluster 1 consists of a single clonal lineage NL-001, known as "Blue_13"; all isolates in this cluster have the A2 mating type and the Ia mitochondrial haplotype. Clusters 2 and 3 display a more elaborate substructure containing many unique genotypes. In Cluster 3, several distinct clonal lineages were also identified. This survey witnesses that the Dutch population underwent dramatic changes in the 10 years under study. The most notable change was the emergence and spread of A2 mating type strain NL-001 (or "Blue_13"). The results emphasize the importance of the sexual cycle in generating genetic diversity and the importance of the asexual cycle as the propagation and dispersal mechanism for successful genotypes. Isolates were also screened for absence of the Avrblb1/ipiO class I gene, which is indicative for virulence on Rpi-blb1. This is also the first report of Rpi-blb1 breakers in the Netherlands. Superimposing the virulence screening on the SSR genetic backbone indicates that lack the Avrblb1/ipiO class I gene only occurred in sexual progeny. So far, the asexual spread of the virulent isolates identified has been limited.
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Affiliation(s)
- Y. Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - T. A. J. van der Lee
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - A. Evenhuis
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - G. B. M. van den Bosch
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - P. J. van Bekkum
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - M. G. Förch
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - M. P. E van Gent-Pelzer
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - H. M. G. van Raaij
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
| | - E. Jacobsen
- Laboratory of Plant Breeding, Wageningen University, 6708 PB Wageningen, The Netherlands
| | - S. W. Huang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
| | - F. Govers
- Laboratory of Phytopathology, Wageningen University, 6700 EE Wageningen, The Netherlands
- Centre for BioSystems Biology, 6700 AB Wageningen, The Netherlands
| | | | - G. J. T. Kessel
- Bio-interactions and Plant Health, Plant Research International, 6700 AA Wageningen, The Netherlands
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Shaughnessy P, Uberti J, Devine S, Maziarz RT, Vose J, Micallef I, Jacobsen E, McCarty J, Stiff P, Artz A, Ball ED, Berryman R, Dugan M, Joyce R, Hsu FJ, Johns D, McSweeney P. Plerixafor and G-CSF for autologous stem cell mobilization in patients with NHL, Hodgkin’s lymphoma and multiple myeloma: results from the expanded access program. Bone Marrow Transplant 2012. [DOI: 10.1038/bmt.2012.219] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Khan SA, Schaart JG, Beekwilder J, Allan AC, Tikunov YM, Jacobsen E, Schouten HJ. The mQTL hotspot on linkage group 16 for phenolic compounds in apple fruits is probably the result of a leucoanthocyanidin reductase gene at that locus. BMC Res Notes 2012; 5:618. [PMID: 23121691 PMCID: PMC3599437 DOI: 10.1186/1756-0500-5-618] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 10/29/2012] [Indexed: 11/16/2022] Open
Abstract
Background Our previous study on ripe apples from a progeny of a cross between the apple cultivars ‘Prima’ and ‘Fiesta’ showed a hotspot of mQTLs for phenolic compounds at the top of LG16, both in peel and in flesh tissues. In order to find the underlying gene(s) of this mQTL hotspot, we investigated the expression profiles of structural and putative transcription factor genes of the phenylpropanoid and flavonoid pathways during different stages of fruit development in progeny genotypes. Results Only the structural gene leucoanthocyanidin reductase (MdLAR1) showed a significant correlation between transcript abundance and content of metabolites that mapped on the mQTL hotspot. This gene is located on LG16 in the mQTL hotspot. Progeny that had inherited one or two copies of the dominant MdLAR1 alleles (Mm, MM) showed a 4.4- and 11.8-fold higher expression level of MdLAR1 respectively, compared to the progeny that had inherited the recessive alleles (mm). This higher expression was associated with a four-fold increase of procyanidin dimer II as one representative metabolite that mapped in the mQTL hotspot. Although expression level of several structural genes were correlated with expression of other structural genes and with some MYB and bHLH transcription factor genes, only expression of MdLAR1 was correlated with metabolites that mapped at the mQTL hotspot. MdLAR1 is the only candidate gene that can explain the mQTL for procyanidins and flavan-3-ols. However, mQTLs for other phenylpropanoids such as phenolic esters, dihydrochalcones and flavonols, that appear to map at the same locus, have so far not been considered to be dependent on LAR, as their biosynthesis does not involve LAR activity. An explanation for this phenomenon is discussed. Conclusions Transcript abundances and genomic positions indicate that the mQTL hotspot for phenolic compounds at the top of LG16 is controlled by the MdLAR1 gene. The dominant allele of the MdLAR1 gene, causing increased content of metabolites that are potentially health beneficial, could be used in marker assisted selection of current apple breeding programs and for cisgenesis.
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Affiliation(s)
- Sabaz Ali Khan
- Wageningen UR Plant Breeding, P,O, Box 16, Wageningen, 6700 AA, The Netherlands
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El-Kharbotly A, Jacobs JM, Hekkert BT, Stiekema WJ, Pereira A, Jacobsen E, Ramanna MS. Localization of Ds-transposon containing T-DNA inserts in the diploid transgenic potato: linkage to the R1 resistance gene against Phytophthora infestans (Mont.) de Bary. Genome 2012; 39:249-57. [PMID: 18469890 DOI: 10.1139/g96-034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Dissociation transposable element (Ds) of maize containing NPTII was introduced into the diploid potato (Solanum tuberosum) clone J91-6400-A16 through Agrobacterium tumefaciens mediated transformation. Genomic DNA sequences flanking the T-DNAs from 312 transformants were obtained with inverse polymerase chain reaction or plasmid rescue techniques and used as probes for RFLP linkage analysis. The RFLP map location of 60 T-DNAs carrying Ds-NPTII was determined. The T-DNA distribution per chromosome and the relative distance between them appeared to be random. All 12 chromosomes have been covered with Ds-containing T-DNAs, potentially enabling tagging of any gene in the potato genome. The T-DNA insertions of two transformants, BET92-Ds-A16-259 and BET92-Ds-A16-416, were linked in repulsion to the position of the resistance gene R1 against Phytophthora infestans. After crossing BET92-Ds-A16-416 with a susceptible parent, 4 desired recombinants (Ds carrying T-DNA linked in coupling phase with the R1 gene) were discovered. These will be used for tagging the R1 gene. The efficiency of the pathway from the introduction to localization of T-DNAs is discussed. Key words : Solanum tuberosum, Phytophthora infestans, Ds element, transposon tagging, R genes, euchromatin.
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Rietman H, Bijsterbosch G, Cano LM, Lee HR, Vossen JH, Jacobsen E, Visser RGF, Kamoun S, Vleeshouwers VGAA. Qualitative and quantitative late blight resistance in the potato cultivar Sarpo Mira is determined by the perception of five distinct RXLR effectors. Mol Plant Microbe Interact 2012; 25:910-9. [PMID: 22414442 DOI: 10.1094/mpmi-01-12-0010-r] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Potato defends against Phytophthora infestans infection by resistance (R)-gene-based qualitative resistance as well as a quantitative field resistance. R genes are renowned to be rapidly overcome by this oomycete, and potato cultivars with a decent and durable resistance to current P. infestans populations are hardly available. However, potato cultivar Sarpo Mira has retained resistance in the field over several years. We dissected the resistance of 'Sarpo Mira' in a segregating population by matching the responses to P. infestans RXLR effectors with race-specific resistance to differential strains. The resistance is based on the combination of four pyramided qualitative R genes and a quantitative R gene that was associated with field resistance. The qualitative R genes include R3a, R3b, R4, and the newly identified Rpi-Smira1. The qualitative resistances matched responses to avirulence (AVR)3a, AVR3b, AVR4, and AVRSmira1 RXLR effectors and were overcome by particular P. infestans strains. The quantitative resistance was determined to be conferred by a novel gene, Rpi-Smira2. It was only detected under field conditions and was associated with responses to the RXLR effector AvrSmira2. We foresee that effector-based resistance breeding will facilitate selecting and combining qualitative and quantitative resistances that may lead to a more durable resistance to late blight.
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Affiliation(s)
- Hendrik Rietman
- Wageningen UR Plant Breeding, Wageningen University, Wageningen, The Netherlands
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Khan SA, Chibon PY, de Vos RC, Schipper BA, Walraven E, Beekwilder J, van Dijk T, Finkers R, Visser RG, van de Weg EW, Bovy A, Cestaro A, Velasco R, Jacobsen E, Schouten HJ. Genetic analysis of metabolites in apple fruits indicates an mQTL hotspot for phenolic compounds on linkage group 16. J Exp Bot 2012; 63:2895-908. [PMID: 22330898 PMCID: PMC3350913 DOI: 10.1093/jxb/err464] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Apple (Malus×domestica Borkh) is among the main sources of phenolic compounds in the human diet. The genetic basis of the quantitative variations of these potentially beneficial phenolic compounds was investigated. A segregating F₁ population was used to map metabolite quantitative trait loci (mQTLs). Untargeted metabolic profiling of peel and flesh tissues of ripe fruits was performed using liquid chromatography-mass spectrometry (LC-MS), resulting in the detection of 418 metabolites in peel and 254 in flesh. In mQTL mapping using MetaNetwork, 669 significant mQTLs were detected: 488 in the peel and 181 in the flesh. Four linkage groups (LGs), LG1, LG8, LG13, and LG16, were found to contain mQTL hotspots, mainly regulating metabolites that belong to the phenylpropanoid pathway. The genetics of annotated metabolites was studied in more detail using MapQTL®. A number of quercetin conjugates had mQTLs on LG1 or LG13. The most important mQTL hotspot with the largest number of metabolites was detected on LG16: mQTLs for 33 peel-related and 17 flesh-related phenolic compounds. Structural genes involved in the phenylpropanoid biosynthetic pathway were located, using the apple genome sequence. The structural gene leucoanthocyanidin reductase (LAR1) was in the mQTL hotspot on LG16, as were seven transcription factor genes. The authors believe that this is the first time that a QTL analysis was performed on such a high number of metabolites in an outbreeding plant species.
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Affiliation(s)
- Sabaz Ali Khan
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
| | - Pierre-Yves Chibon
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
| | - Ric C.H. de Vos
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
- Netherlands Metabolomics Centre, Einsteinweg 55, 2333 CC Leiden, The Netherlands
- Centre for BioSystems Genomics, PO Box 98, 6700 AB, Wageningen, The Netherlands
| | - Bert A. Schipper
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
- Netherlands Metabolomics Centre, Einsteinweg 55, 2333 CC Leiden, The Netherlands
- Centre for BioSystems Genomics, PO Box 98, 6700 AB, Wageningen, The Netherlands
| | - Evert Walraven
- Wageningen University and Research Centre, Lingewal 1, 6668 LA Randwijk, The Netherlands
| | - Jules Beekwilder
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Thijs van Dijk
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
| | - Richard Finkers
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Richard G.F. Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
| | - Eric W. van de Weg
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
| | - Arnaud Bovy
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
- Centre for BioSystems Genomics, PO Box 98, 6700 AB, Wageningen, The Netherlands
| | - Alessandro Cestaro
- Istituto Agrario San Michele all’Adige Research and Innovation Centre, Edmund Mach Foundation, Trento, Italy
| | - Riccardo Velasco
- Istituto Agrario San Michele all’Adige Research and Innovation Centre, Edmund Mach Foundation, Trento, Italy
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, 6708 PB Wageningen, The Netherlands
| | - Henk J. Schouten
- Wageningen University and Research Centre, PO Box 16, 6700 AA, Wageningen, The Netherlands
- To whom correspondence should be addressed. E-mail:
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Kim HJ, Lee HR, Jo KR, Mortazavian SMM, Huigen DJ, Evenhuis B, Kessel G, Visser RGF, Jacobsen E, Vossen JH. Broad spectrum late blight resistance in potato differential set plants MaR8 and MaR9 is conferred by multiple stacked R genes. Theor Appl Genet 2012; 124:923-35. [PMID: 22109085 PMCID: PMC3284673 DOI: 10.1007/s00122-011-1757-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Accepted: 11/05/2011] [Indexed: 05/20/2023]
Abstract
Phytophthora infestans is the causal agent of late blight in potato. The Mexican species Solanum demissum is well known as a good resistance source. Among the 11 R gene differentials, which were introgressed from S. demissum, especially R8 and R9 differentials showed broad spectrum resistance both under laboratory and under field conditions. In order to gather more information about the resistance of the R8 and R9 differentials, F1 and BC1 populations were made by crossing Mastenbroek (Ma) R8 and R9 clones to susceptible plants. Parents and offspring plants were examined for their pathogen recognition specificities using agroinfiltration with known Avr genes, detached leaf assays (DLA) with selected isolates, and gene-specific markers. An important observation was the discrepancy between DLA and field trial results for Pi isolate IPO-C in all F1 and BC1 populations, so therefore also field trial results were included in our characterization. It was shown that in MaR8 and MaR9, respectively, at least four (R3a, R3b, R4, and R8) and seven (R1, Rpi-abpt1, R3a, R3b, R4, R8, R9) R genes were present. Analysis of MaR8 and MaR9 offspring plants, that contained different combinations of multiple resistance genes, showed that R gene stacking contributed to the Pi recognition spectrum. Also, using a Pi virulence monitoring system in the field, it was shown that stacking of multiple R genes strongly delayed the onset of late blight symptoms. The contribution of R8 to this delay was remarkable since a plant that contained only the R8 resistance gene still conferred a delay similar to plants with multiple resistance genes, like, e.g., cv Sarpo Mira. Using this "de-stacking" approach, many R gene combinations can be made and tested in order to select broad spectrum R gene stacks that potentially provide enhanced durability for future application in new late blight resistant varieties.
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Affiliation(s)
- Hyoun-Joung Kim
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
- Present Address: Biotechnology Institute, Nongwoo Bio. Co., Ltd, Yeoju, Gyeonggi Republic of Korea
| | - Heung-Ryul Lee
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
- Present Address: Biotechnology Institute, Nongwoo Bio. Co., Ltd, Yeoju, Gyeonggi Republic of Korea
| | - Kwang-Ryong Jo
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, Democratic People’s Republic of Korea
| | - S. M. Mahdi Mortazavian
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
- Present Address: Department of Agronomy and Plant Breeding Sciences, College of Aburaihan, University of Tehran, Pakdasht, Iran
| | - Dirk Jan Huigen
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Bert Evenhuis
- Plant Research International, Biointeractions and Plant Health, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Geert Kessel
- Plant Research International, Biointeractions and Plant Health, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Richard G. F. Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Jack H. Vossen
- Wageningen UR Plant Breeding, Wageningen University and Research Center, Wageningen, The Netherlands
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Jo KR, Arens M, Kim TY, Jongsma MA, Visser RGF, Jacobsen E, Vossen JH. Mapping of the S. demissum late blight resistance gene R8 to a new locus on chromosome IX. Theor Appl Genet 2011; 123:1331-40. [PMID: 21877150 PMCID: PMC3214258 DOI: 10.1007/s00122-011-1670-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Accepted: 07/26/2011] [Indexed: 05/20/2023]
Abstract
The use of resistant varieties is an important tool in the management of late blight, which threatens potato production worldwide. Clone MaR8 from the Mastenbroek differential set has strong resistance to Phytophthora infestans, the causal agent of late blight. The F1 progeny of a cross between the susceptible cultivar Concurrent and MaR8 were assessed for late blight resistance in field trials inoculated with an incompatible P. infestans isolate. A 1:1 segregation of resistance and susceptibility was observed, indicating that the resistance gene referred to as R8, is present in simplex in the tetraploid MaR8 clone. NBS profiling and successive marker sequence comparison to the potato and tomato genome draft sequences, suggested that the R8 gene is located on the long arm of chromosome IX and not on the short arm of chromosome XI as was suggested previously. Analysis of SSR, CAPS and SCAR markers confirmed that R8 was on the distal end of the long arm of chromosome IX. R gene cluster directed profiling markers CDP(Sw5)4 and CDP(Sw5)5 flanked the R8 gene at the distal end (1 cM). CDP(Tm2)1-1, CDP(Tm2)1-2 and CDP(Tm2)2 flanked the R8 gene on the proximal side (2 cM). An additional co-segregating marker (CDP(Hero)3) was found, which will be useful for marker assisted breeding and map based cloning of R8.
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Affiliation(s)
- Kwang-Ryong Jo
- Laboratory of Plant Breeding, Wageningen University and Research Centre, Wageningen, The Netherlands
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Marjon Arens
- Laboratory of Plant Breeding, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Tok-Yong Kim
- Research Institute of Agrobiology, Academy of Agricultural Sciences, Pyongyang, DPR Korea
| | - Maarten A. Jongsma
- Plant Research International, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Richard G. F. Visser
- Laboratory of Plant Breeding, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Evert Jacobsen
- Laboratory of Plant Breeding, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Jack H. Vossen
- Laboratory of Plant Breeding, Wageningen University and Research Centre, Wageningen, The Netherlands
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Li G, Huang S, Guo X, Li Y, Yang Y, Guo Z, Kuang H, Rietman H, Bergervoet M, Vleeshouwers VGGA, van der Vossen EAG, Qu D, Visser RGF, Jacobsen E, Vossen JH. Cloning and characterization of r3b; members of the r3 superfamily of late blight resistance genes show sequence and functional divergence. Mol Plant Microbe Interact 2011; 24:1132-42. [PMID: 21649512 DOI: 10.1094/mpmi-11-10-0276] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Massive resistance (R) gene stacking is considered to be one of the most promising approaches to provide durable resistance to potato late blight for both conventional and genetically modified breeding strategies. The R3 complex locus on chromosome XI in potato is an example of natural R gene stacking, because it contains two closely linked R genes (R3a and R3b) with distinct resistance specificities to Phytophthora infestans. Here, we report about the positional cloning of R3b. Both transient and stable transformations of susceptible tobacco and potato plants showed that R3b conferred full resistance to incompatible P. infestans isolates. R3b encodes a coiled-coil nucleotide-binding site leucine-rich repeat protein and exhibits 82% nucleotide identity with R3a located in the same R3 cluster. The R3b gene specifically recognizes Avr3b, a newly identified avirulence factor from P. infestans. R3b does not recognize Avr3a, the corresponding avirulence gene for R3a, showing that, despite their high sequence similarity, R3b and R3a have clearly distinct recognition specificities. In addition to the Rpi-mcd1/Rpi-blb3 locus on chromosome IV, the R3 locus on chromosome XI is the second example of an R-gene cluster with multiple genes recognizing different races of P. infestans.
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Affiliation(s)
- Guangcun Li
- key Laboratory of Corp Genetic Improvement and Biotechnology, Shandong Province, Shandong Academy of Agricultural Sciences, Jinan 250100, P.R. China
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Dalton SO, Frederiksen BL, Jacobsen E, Steding-Jessen M, Østerlind K, Schüz J, Osler M, Johansen C. Socioeconomic position, stage of lung cancer and time between referral and diagnosis in Denmark, 2001-2008. Br J Cancer 2011; 105:1042-8. [PMID: 21897390 PMCID: PMC3185954 DOI: 10.1038/bjc.2011.342] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Introduction: We investigated the association between socioeconomic position, stage at diagnosis, and length of period between referral and diagnosis in a nationwide cohort of lung cancer patients. Methods: Through the Danish Lung Cancer Register, we identified 18 103 persons diagnosed with lung cancer (small cell and non-small cell) in Denmark, 2001–2008, and obtained information on socioeconomic position and comorbidity from nationwide administrative registries. The odds ratio (OR) for a diagnosis of advanced-stage lung cancer (stages IIIB–IV) and for a diagnosis >28 days after referral were analysed by multivariate logistic regression models. Results: The adjusted OR for advanced-stage lung cancer was reduced among persons with higher education (OR, 0.92; 95% confidence interval (CI), 0.84–0.99), was increased in persons living alone (OR, 1.06; 95% CI, 1.01–1.13) and decreased stepwise with increasing comorbidity. Higher education was associated with a reduced OR for >28 days between referral and diagnosis as was high income in early-stage patients. Male gender, age and severe comorbidity were associated with increased ORs in advanced-stage patients. Interpretation: Differences by socioeconomic position in stage at diagnosis and in the period between referral and diagnosis indicate that vulnerable patients presenting with lung cancer symptoms require special attention.
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Affiliation(s)
- S O Dalton
- Department of Psychosocial Cancer Research, Institute of Cancer Epidemiology, Danish Cancer Society, 49 Strandboulevarden, 2100 Copenhagen, Denmark.
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Vleeshouwers VGAA, Finkers R, Budding D, Visser M, Jacobs MMJ, van Berloo R, Pel M, Champouret N, Bakker E, Krenek P, Rietman H, Huigen D, Hoekstra R, Goverse A, Vosman B, Jacobsen E, Visser RGF. SolRgene: an online database to explore disease resistance genes in tuber-bearing Solanum species. BMC Plant Biol 2011; 11:116. [PMID: 21851635 PMCID: PMC3166922 DOI: 10.1186/1471-2229-11-116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 08/18/2011] [Indexed: 05/04/2023]
Abstract
BACKGROUND The cultivated potato (Solanum tuberosum L.) is an important food crop, but highly susceptible to many pathogens. The major threat to potato production is the Irish famine pathogen Phytophthora infestans, which causes the devastating late blight disease. Potato breeding makes use of germplasm from wild relatives (wild germplasm) to introduce resistances into cultivated potato. The Solanum section Petota comprises tuber-bearing species that are potential donors of new disease resistance genes. The aim of this study was to explore Solanum section Petota for resistance genes and generate a widely accessible resource that is useful for studying and implementing disease resistance in potato. DESCRIPTION The SolRgene database contains data on resistance to P. infestans and presence of R genes and R gene homologues in Solanum section Petota. We have explored Solanum section Petota for resistance to late blight in high throughput disease tests under various laboratory conditions and in field trials. From resistant wild germplasm, segregating populations were generated and assessed for the presence of resistance genes. All these data have been entered into the SolRgene database. To facilitate genetic and resistance gene evolution studies, phylogenetic data of the entire SolRgene collection are included, as well as a tool for generating phylogenetic trees of selected groups of germplasm. Data from resistance gene allele-mining studies are incorporated, which enables detection of R gene homologs in related germplasm. Using these resources, various resistance genes have been detected and some of these have been cloned, whereas others are in the cloning pipeline. All this information is stored in the online SolRgene database, which allows users to query resistance data, sequences, passport data of the accessions, and phylogenic classifications. CONCLUSION Solanum section Petota forms the basis of the SolRgene database, which contains a collection of resistance data of an unprecedented size and precision. Complemented with R gene sequence data and phylogenetic tools, SolRgene can be considered the primary resource for information on R genes from potato and wild tuber-bearing relatives.
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Affiliation(s)
- Vivianne GAA Vleeshouwers
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Richard Finkers
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Dirk Budding
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Marcel Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Mirjam MJ Jacobs
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Ralph van Berloo
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Mathieu Pel
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Nicolas Champouret
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Erin Bakker
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Laboratory of Nematology, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Pavel Krenek
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre of the Region Hana for Biotechnological and Agricultural Research, Department of Cell Biology, Faculty of Science, Palacky University, Slechtitelu 11, Olomouc, CZ-78371, Czech Republic
| | - Hendrik Rietman
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - DirkJan Huigen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Roel Hoekstra
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Centre for Genetic Resources, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Aska Goverse
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
- Laboratory of Nematology, Wageningen University and Research Centre, Wageningen, The Netherlands
| | - Ben Vosman
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
| | - Richard GF Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB, Wageningen, The Netherlands
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Joshi SG, Schaart JG, Groenwold R, Jacobsen E, Schouten HJ, Krens FA. Functional analysis and expression profiling of HcrVf1 and HcrVf2 for development of scab resistant cisgenic and intragenic apples. Plant Mol Biol 2011; 75:579-91. [PMID: 21293908 PMCID: PMC3057008 DOI: 10.1007/s11103-011-9749-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Accepted: 01/24/2011] [Indexed: 05/18/2023]
Abstract
Apple scab resistance genes, HcrVf1 and HcrVf2, were isolated including their native promoter, coding and terminator sequences. Two fragment lengths (short and long) of the native gene promoters and the strong apple rubisco gene promoter (P(MdRbc)) were used for both HcrVf genes to test their effect on expression and phenotype. The scab susceptible cultivar 'Gala' was used for plant transformations and after selection of transformants, they were micrografted onto apple seedling rootstocks for scab disease tests. Apple transformants were also tested for HcrVf expression by quantitative RT-PCR (qRT-PCR). For HcrVf1 the long native promoter gave significantly higher expression that the short one; in case of HcrVf2 the difference between the two was not significant. The apple rubisco gene promoter proved to give the highest expression of both HcrVf1 and HcrVf2. The top four expanding leaves were used initially for inoculation with monoconidial isolate EU-B05 which belongs to race 1 of V. inaequalis. Later six other V. inaequalis isolates were used to study the resistance spectra of the individual HcrVf genes. The scab disease assays showed that HcrVf1 did not give resistance against any of the isolates tested regardless of the expression level. The HcrVf2 gene appeared to be the only functional gene for resistance against Vf avirulent isolates of V. inaequalis. HcrVf2 did not provide any resistance to Vf virulent strains, even not in case of overexpression. In conclusion, transformants carrying the apple-derived HcrVf2 gene in a cisgenic as well as in an intragenic configuration were able to reach scab resistance levels comparable to the Vf resistant control cultivar obtained by classical breeding, cv. 'Santana'.
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Affiliation(s)
- Sameer G. Joshi
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Jan G. Schaart
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Remmelt Groenwold
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Evert Jacobsen
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Henk J. Schouten
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
| | - Frans A. Krens
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands
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47
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Kortstee AJ, Khan SA, Helderman C, Trindade LM, Wu Y, Visser RGF, Brendolise C, Allan A, Schouten HJ, Jacobsen E. Anthocyanin production as a potential visual selection marker during plant transformation. Transgenic Res 2011; 20:1253-64. [PMID: 21340526 PMCID: PMC3210953 DOI: 10.1007/s11248-011-9490-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 02/03/2011] [Indexed: 11/24/2022]
Abstract
A mutant allele of the transcription factor gene MYB10 from apple induces anthocyanin production throughout the plant. This gene, including its upstream promoter, gene coding region and terminator sequence, was introduced into apple, strawberry and potato plants to determine whether it could be used as a visible selectable marker for plant transformation as an alternative to chemically selectable markers, such as kanamycin resistance. After transformation, red coloured calli, red shoots and red well-growing plants were scored. Red and green shoots were harvested from apple explants and examined for the presence of the MYB10 gene by PCR analysis. Red shoots of apple explants always contained the MYB10 gene but not all MYB10 containing shoots were red. Strawberry plants transformed with the MYB10 gene showed anthocyanin accumulation in leaves and roots. No visible accumulation of anthocyanin could be observed in potato plants grown in vitro, even the ones carrying the MYB10 gene. However, acid methanol extracts of potato shoots or roots carrying the MYB10 gene contained up to four times higher anthocyanin content than control plants. Therefore anthocyanin production as result of the apple MYB10 gene can be used as a selectable marker for apple, strawberry and potato transformation, replacing kanamycin resistance.
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Affiliation(s)
- A J Kortstee
- Wageningen UR Plant Breeding, Wageningen University and Research Centre, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
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48
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Schenk MF, van der Maas MP, Smulders MJ, Gilissen LJ, Fischer AR, van der Lans IA, Jacobsen E, Frewer LJ. Consumer attitudes towards hypoallergenic apples that alleviate mild apple allergy. Food Qual Prefer 2011. [DOI: 10.1016/j.foodqual.2010.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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49
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Bishop F, Jacobsen E, Shaw J, Kaptchuk T. Debriefing to placebo allocation: A phenomenological study of participants’ experiences in a randomized clinical trial. Eur J Integr Med 2010. [DOI: 10.1016/j.eujim.2010.09.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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50
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Lokossou AA, Rietman H, Wang M, Krenek P, van der Schoot H, Henken B, Hoekstra R, Vleeshouwers VGAA, van der Vossen EAG, Visser RGF, Jacobsen E, Vosman B. Diversity, distribution, and evolution of Solanum bulbocastanum late blight resistance genes. Mol Plant Microbe Interact 2010; 23:1206-16. [PMID: 20687810 DOI: 10.1094/mpmi-23-9-1206] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Knowledge on the evolution and distribution of late blight resistance genes is important for a better understanding of the dynamics of these genes in nature. We analyzed the presence and allelic diversity of the late blight resistance genes Rpi-blb1, Rpi-blb2, and Rpi-blb3, originating from Solanum bulbocastanum, in a set of tuber-bearing Solanum species comprising 196 different taxa. The three genes were only present in some Mexican diploid as well as polyploid species closely related to S. bulbocastanum. Sequence analysis of the fragments obtained from the Rpi-blb1 and Rpi-blb3 genes suggests an evolution through recombinations and point mutations. For Rpi-blb2, only sequences identical to the cloned gene were found in S. bulbocastanum accessions, suggesting that it has emerged recently. The three resistance genes occurred in different combinations and frequencies in S. bulbocastanum accessions and their spread is confined to Central America. A selected set of genotypes was tested for their response to the avirulence effectors IPIO-2, Avr-blb2, and Pi-Avr2, which interact with Rpi-blb1, Rpi-blb2, and Rpi-blb3, respectively, as well as by disease assays with a diverse set of isolates. Using this approach, some accessions could be identified that contain novel, as yet unknown, late blight resistance factors in addition to the Rpi-blb1, Rpi-blb2, and Rpi-blb3 genes.
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Affiliation(s)
- Anoma A Lokossou
- Wageningen UR Plant Breeding, P.O. Box 16, 6700AA, Wageningen, The Netherlands
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