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Ban S, Jung JH. Somatic Mutations in Fruit Trees: Causes, Detection Methods, and Molecular Mechanisms. PLANTS (BASEL, SWITZERLAND) 2023; 12:1316. [PMID: 36987007 PMCID: PMC10056856 DOI: 10.3390/plants12061316] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/11/2023] [Accepted: 03/12/2023] [Indexed: 06/19/2023]
Abstract
Somatic mutations are genetic changes that occur in non-reproductive cells. In fruit trees, such as apple, grape, orange, and peach, somatic mutations are typically observed as "bud sports" that remain stable during vegetative propagation. Bud sports exhibit various horticulturally important traits that differ from those of their parent plants. Somatic mutations are caused by internal factors, such as DNA replication error, DNA repair error, transposable elements, and deletion, and external factors, such as strong ultraviolet radiation, high temperature, and water availability. There are several methods for detecting somatic mutations, including cytogenetic analysis, and molecular techniques, such as PCR-based methods, DNA sequencing, and epigenomic profiling. Each method has its advantages and limitations, and the choice of method depends on the research question and the available resources. The purpose of this review is to provide a comprehensive understanding of the factors that cause somatic mutations, techniques used to identify them, and underlying molecular mechanisms. Furthermore, we present several case studies that demonstrate how somatic mutation research can be leveraged to discover novel genetic variations. Overall, considering the diverse academic and practical value of somatic mutations in fruit crops, especially those that require lengthy breeding efforts, related research is expected to become more active.
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Savoia MA, Del Faro L, Turco A, Fanelli V, Venerito P, Montemurro C, Sabetta W. Biodiversity Evaluation and Preservation of Italian Stone Fruit Germplasm (Peach and Apricot) in Southern Italy. PLANTS (BASEL, SWITZERLAND) 2023; 12:1279. [PMID: 36986967 PMCID: PMC10055517 DOI: 10.3390/plants12061279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/27/2023] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
The Prunus genus encompasses a group of economically important and closely related crops, sharing an essentially common genome and, thereby, a high level of conserved and transferable microsatellite (SSR) loci. In Southern Italy, many of the local and/or neglected varieties are abandoned and at risk of extinction due to the high degree of urbanization and agricultural intensification, despite their value as genetic resources for crop improvement. This research aimed to genetically and morphologically characterize the traditional apricot (P. armenica) and peach (P. persica) germplasms collected in old family orchards. Most of the official descriptor categories were scored, thus revealing a rather high level of phenotypic variation in both collections. Genetic data allowed the discovery of diversity masked by morphological traits. Genotyping in 15 and 18 SSRs, eight of which were transferable across both species, showed an average polymorphic informativeness (PIC) of 0.44 and 0.59 for apricot and peach, respectively, and a total of 70 and 144 alleles. A reliable identification of each genotype was achieved, and the presence of possible mislabeling and/or erroneous denominations was solved. These results are encouraging for the valorization of the still poorly explored Italian Prunus germplasm, with significant economic consequences for bioresource conservation and management.
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Affiliation(s)
- Michele Antonio Savoia
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy
| | - Loredana Del Faro
- CRSFA-Centro Ricerca, Sperimentazione e Formazione in Agricoltura “Basile Caramia”, Via Cisternino 281, 70010 Locorotondo, Italy
| | - Andrea Turco
- CRSFA-Centro Ricerca, Sperimentazione e Formazione in Agricoltura “Basile Caramia”, Via Cisternino 281, 70010 Locorotondo, Italy
| | - Valentina Fanelli
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy
| | - Pasquale Venerito
- CRSFA-Centro Ricerca, Sperimentazione e Formazione in Agricoltura “Basile Caramia”, Via Cisternino 281, 70010 Locorotondo, Italy
| | - Cinzia Montemurro
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy
- Spin Off Sinagri s.r.l., University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy
- Institute for Sustainable Plant Protection–Support Unit Bari, National Research Council (IPSP-CNR), Via Amendola 165/A, 70126 Bari, Italy
| | - Wilma Sabetta
- Spin Off Sinagri s.r.l., University of Bari Aldo Moro, Via Amendola 165/A, 70126 Bari, Italy
- Institute of Biosciences and BioResources, National Research Council (IBBR-CNR), Via Amendola 165/A, 70126 Bari, Italy
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Molecular Characterization of Prunus Cultivars from Romania by Microsatellite Markers. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8040291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In Romania, Prunus species have great economic and social importance. With the introduction of new cultivars arises the need to preserve and characterize the local Prunus germplasm. Thus, a set of 24 polymorphic SSRs were selected for the overall characterization, including 10 peach, 11 apricot and 5 nectarine cultivars. The average number of alleles per locus (Na = 1.958), in addition to overall observed (Ho = 0.299) and expected heterozygosity (He = 0.286) were lower or comparable to those reported in similar studies, probably explained by the smaller number of analyzed cultivars restricted to a smaller geographic area. Among 26 genotypes a total of 101 alleles were identified, of which 46 alleles were in peach, 55 in apricot and 40 in nectarine, respectively. Six alleles from six loci (CPPCT-030, Pchgms-003, Pchgms-004, Pchgms-010, UDP97-401, UDP98-405) were common to all taxonomic groups. The most informative loci were BPPCT-025, Pchgms-021 and UDP96-001 in peach; BPPCT-025, BPPCT-001 and UDP96-001 in nectarine; and BPPCT-002, BPPCT-025, Pchgms-004, Pchgms-020 and Pchgms-021 in apricot. Clustering and genetic similarity analysis indicated that the degree of interspecific divergence in peach and nectarine cultivars was less than that in peach and apricot. These results will be useful to prevent confusion between cultivars, to improve breeding strategies and to benefit the management of Prunus cultivars bred in Romania.
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Kalluri N, Serra O, Donoso JM, Picañol R, Howad W, Eduardo I, Arús P. Construction of a collection of introgression lines of "Texas" almond DNA fragments in the "Earlygold" peach genetic background. HORTICULTURE RESEARCH 2022; 9:uhac070. [PMID: 35669708 PMCID: PMC9157678 DOI: 10.1093/hr/uhac070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/09/2022] [Indexed: 06/15/2023]
Abstract
Peach [Prunus persica L. Batsch] is one of the major temperate fruit tree species, the commercial materials of which have a low level of genetic variability. Almond [P. dulcis (Mill) DA Webb], a close relative of peach cultivated for its kernels, has a much higher level of diversity. The species are inter-compatible and often produce fertile hybrids, almond being a possible source of new genes for peach that could provide biotic and abiotic stress tolerance traits. In this paper we describe the development of a collection of peach-almond introgression lines (ILs) having a single fragment of almond (cv. Texas) in the peach background (cv. Earlygold). Lines with few introgressions were selected with markers from successive generations from a "Texas" × "Earlygold" F1 hybrid, initially using a set of SSRs and later with the 18 k peach SNP chip, allowing for the final extraction of 67 lines, 39 with almond heterozygous introgressions covering 99% of the genome, and 28 with homozygous introgressions covering 83% of the genome. As a proof of concept, four major genes and four quantitative characters were examined in the selected ILs giving results generally consistent with previous information on the genetics of these characters. This collection is the first of its kind produced in a woody perennial species and promises to be a valuable tool for genetic analyses, including dissection of quantitative traits, positional cloning, epistasis and as prebreeding material to introgress almond genes of interest into the peach commercial gene pool.
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Affiliation(s)
- Naveen Kalluri
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
| | - Octávio Serra
- Instituto Nacional de Investigação Agrária e Veterinária, I.P., Banco Português de Germoplasma Vegetal (BPGV), Braga, Portugal
| | - José Manuel Donoso
- Instituto de Investigaciones Agropecuarias (INIA), Centro Regional de Investigación Rayentué, Av. Salamanca s/n Sector Los Choapinos, Rengo 2940000, Chile
| | - Roger Picañol
- Rijk Zwaan Ibérica S.A. Finca La Marina-PJ Lo Contreras 30395, La Puebla|Cartagena (Murcia), Spain
| | - Werner Howad
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
- IRTA, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
| | - Iban Eduardo
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
- IRTA, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
| | - Pere Arús
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
- IRTA, Campus UAB, Edifici CRAG, Cerdanyola del Vallès (Bellaterra), 08193 Barcelona, Spain
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Mas-Gómez J, Cantín CM, Moreno MÁ, Martínez-García PJ. Genetic Diversity and Genome-Wide Association Study of Morphological and Quality Traits in Peach Using Two Spanish Peach Germplasm Collections. FRONTIERS IN PLANT SCIENCE 2022; 13:854770. [PMID: 35386674 PMCID: PMC8979248 DOI: 10.3389/fpls.2022.854770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
Peach [Prunus persica (L.) Batsch] is one of the most important stone fruits species in world production. Spanish peach production is currently the second largest in the world and the available cultivars in Spain includes a great source of genetic diversity with variability in fruit quality traits and postharvest disorders tolerance. In order to explore the genetic diversity and single nucleotide polymorphism (SNP)-trait associations in the Spanish germplasm, the new peach 18K SNP v2 array was used to genotype 287 accessions belonging to the two National Peach Germplasm Collections placed at the Agrifood Research and Technology Centre of Aragon (CITA) and at the Experimental Station of Aula Dei (EEAD)-CSIC. The high density of the new SNP array allowed the identification of 30 groups of synonymies, which had not been identified before using low-density markers. In addition, a possible large-scale molecular event in 'Starcrest', a sport of 'Springcrest', was detected showing a possible chromosome replacement of a 13.5 Mb region. Previous suggestions about Spanish diversification regions agreed with our genetic diversity and linkage disequilibrium (LD) decay results using high-density markers. A genome-wide association study (GWAS) detected 34 significant SNP-trait association with the type of leaf glands (TLG), fruit hairiness (FH), and flesh texture (FT). The impact of the significant SNPs was studied with SnpEff. Candidate genes encode several important family proteins involved in trichome formation and powdery mildew resistance (linked to TLG in peach). The genetic distance among cultivars obtained, together with SNP-trait associations found, provide new knowledge for marker-assisted selection and crossing approaches in peach breeding programmes.
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Affiliation(s)
- Jorge Mas-Gómez
- Department of Plant Breeding, Centre of Edaphology and Applied Biology of Segura, Spanish National Research Council (CEBAS-CSIC), Murcia, Spain
| | - Celia M. Cantín
- Department of Pomology, Experimental Station of Aula Dei-CSIC, Spanish National Research Council, Zaragoza, Spain
- Department of Horticulture, Agrifood Research and Technology Centre of Aragon, Zaragoza, Spain
| | - María Ángeles Moreno
- Department of Pomology, Experimental Station of Aula Dei-CSIC, Spanish National Research Council, Zaragoza, Spain
| | - Pedro J. Martínez-García
- Department of Plant Breeding, Centre of Edaphology and Applied Biology of Segura, Spanish National Research Council (CEBAS-CSIC), Murcia, Spain
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Genetic Diversity of Peach Cultivars from the Collection of the Nikita Botanical Garden Based on SSR Markers. PLANTS 2021; 10:plants10122609. [PMID: 34961080 PMCID: PMC8704053 DOI: 10.3390/plants10122609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/24/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
The Nikita Botanical Garden (NBG) has a unique Prunus L. collection (peach, apricot, plum, cherry) comprising more than 3000 accessions. NBG is also a breeding center for stone fruits, including peach (Prunus persica (L.) Batsch). In the present study a set of 85 peach cultivars bred in NBG, Europe, and North America was analyzed using 12 SSR markers to assess their genetic diversity and relatedness. The detected polymorphism level was comparable to the previous estimates of genetic variability in peach cultivars. The average number of alleles per locus was 5.67, PIC value averaged 0.49, expected, and observed heterozygosity averaged 0.52 and 0.31, respectively. Among the detected alleles, 19 (27.94%) were rare and 12 (17.65%) were unique. All studied accessions except two could be identified with the used marker set. Cluster analysis revealed some groups according to the cultivars’ pedigrees. No clear differentiation of the studied sample according to geographic origin or fruit characteristics of peach cultivars was revealed. The results provide valuable information for identification and rational management of the material preserved in the NBG peach collection.
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Bourguiba H, Batnini MA, Naccache C, Zitouna N, Trifi-Farah N, Audergon JM, Krichen L. Chloroplastic and nuclear diversity of endemic Prunus armeniaca L. species in the oasis agroecosystems. Genetica 2021; 149:239-251. [PMID: 34231081 DOI: 10.1007/s10709-021-00127-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 06/28/2021] [Indexed: 11/26/2022]
Abstract
Tunisia is characterized by the presence of specific seed-propagated apricot (Prunus armeniaca L.) material which is found in the oasis agroecosystems. In order to highlight the genetic diversity, population structure, and demographic history of this germplasm, 33 apricot accessions collected from six different oasis regions in southwestern Tunisia were genotyped using 24 microsatellite markers. A total number of 111 alleles was detected with an average of 4.62 alleles per locus. Bayesian model-based clustering analysis indicated four subdivisions within the collection sampled that corresponded mainly to the geographic origin of the material. The analysis of the 33 accessions using chloroplast markers allowed the identification of 32 haplotypes. Overall, the present study highlighted the high Tunisian apricot's diversity in the traditional oasis agroecosystems with low genetic differentiation. Understanding the structure of seed-propagated apricot collection is crucial for managing collections in regard to adaptive traits for Arid and Saharan climates as well as for identifying interesting genotypes that can be integrated into international coordinated actions of breeding programs.
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Affiliation(s)
- Hedia Bourguiba
- Université Tunis El Manar (UTM) - Faculté Des Sciences De Tunis (FST), Laboratoire de Génétique Moléculaire, Immunologie et Biotechnologie (LGMIB) (LR99ES12), Campus universitaire Farhat Hached, Tunis, Tunisia.
| | - Mohamed-Amine Batnini
- Department of Plant Pathology, OARDC/OSU, 120 Selby, 1680 Madison Ave, Wooster, OH, 44691, USA
| | - Chahnez Naccache
- Université Tunis El Manar (UTM) - Faculté Des Sciences De Tunis (FST), Laboratoire de Biochimie et Biotechnology (LR01ES05), Tunis, Tunisia
| | - Nadia Zitouna
- LR16IPT05, Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Neila Trifi-Farah
- Université Tunis El Manar (UTM) - Faculté Des Sciences De Tunis (FST), Laboratoire de Génétique Moléculaire, Immunologie et Biotechnologie (LGMIB) (LR99ES12), Campus universitaire Farhat Hached, Tunis, Tunisia
| | - Jean-Marc Audergon
- INRAe Centre PACA, UR 1052 GAFL, Domaine St Maurice, 67, allée des chênes, CS60094, 84143, Montfavet Cedex, France
| | - Lamia Krichen
- Université Tunis El Manar (UTM) - Faculté Des Sciences De Tunis (FST), Laboratoire de Génétique Moléculaire, Immunologie et Biotechnologie (LGMIB) (LR99ES12), Campus universitaire Farhat Hached, Tunis, Tunisia
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Tillault A, Yevtushenko DP. Simple sequence repeat analysis of new potato varieties developed in Alberta, Canada. PLANT DIRECT 2019; 3:e00140. [PMID: 31245780 PMCID: PMC6551368 DOI: 10.1002/pld3.140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/26/2019] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
The worldwide demand for potato production requires the constant development of new potato varieties with improved yield, quality, disease resistance, and abiotic tolerance. However, cultivar registration is preceded by a long process to morphologically and physiologically characterize the plants. Notably, this process can be expedited by DNA marker analysis. Simple sequence repeats (SSRs), also known as microsatellites, are the most common reliable DNA markers used to discriminate between genotypes. In this study, 20 potato varieties, including five new genotypes developed in Alberta, Canada, were fingerprinted using 10 SSR markers selected for their high discriminatory power. Different SSRs were amplified from potato DNA using specific primers, and the DNA fragment sizes were analyzed by denaturing polyacrylamide gel electrophoresis. The number of alleles per locus ranged from two for the SSR marker STPoAc58 to six for STM0030 and STM0037 with an average of 4.4. In addition, a total of 77 unique patterns were observed for the 10 SSR markers. The polymorphic information content ranged from 0.477 to 0.802 with an average of 0.675 per locus. In this study, STM0037, STM1016, and STM1104 were found to be the best SSR markers to detect genetic differences between potato varieties. A minimum of two markers was required to distinguish between all 20 genotypes. Most importantly, this highly informative molecular tool confirmed that the developed potato varieties were genetically different from their respective maternal lines and potentially constituted new cultivars.
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Affiliation(s)
- Anne‐Sophie Tillault
- Department of Biological SciencesUniversity of LethbridgeLethbridgeAlbertaCanada
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Foster TM, Aranzana MJ. Attention sports fans! The far-reaching contributions of bud sport mutants to horticulture and plant biology. HORTICULTURE RESEARCH 2018; 5:44. [PMID: 30038785 PMCID: PMC6046048 DOI: 10.1038/s41438-018-0062-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 06/06/2018] [Indexed: 05/08/2023]
Abstract
A bud sport is a lateral shoot, inflorescence or single flower/fruit with a visibly different phenotype from the rest of the plant. The new phenotype is often caused by a stable somatic mutation in a single cell that is passed on to its clonal descendants and eventually populates part or all of a meristem. In many cases, a bud sport can be vegetatively propagated, thereby preserving the novel phenotype without sexual reproduction. Bud sports provide new characteristics while retaining the desirable qualities of the parent plant, which is why many bud sports have been developed into popular cultivars. We present an overview of the history of bud sports, the causes and methods of detecting somaclonal variation, and the types of mutant phenotypes that have arisen spontaneously. We focus on examples where the molecular or cytological changes causing the phenotype have been identified. Analysis of these sports has provided valuable insight into developmental processes, gene function and regulation, and in some cases has revealed new information about layer-specific roles of some genes. Examination of the molecular changes causing a phenotype and in some cases reversion back to the original state has contributed to our understanding of the mechanisms that drive genomic evolution.
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Affiliation(s)
- Toshi M. Foster
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North, 4474 New Zealand
| | - Maria José Aranzana
- IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Barcelona, Spain
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain
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Cantín CM, Arús P, Eduardo I. Identification of a new allele of the Dw gene causing brachytic dwarfing in peach. BMC Res Notes 2018; 11:386. [PMID: 29898773 PMCID: PMC6000960 DOI: 10.1186/s13104-018-3490-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/05/2018] [Indexed: 12/04/2022] Open
Abstract
Objective Peach brachytic dwarfism determined by Dwarf gene (Dw) is an undesired trait segregating in some peach breeding programs. Recently, a single nucleotide polymorphism (SNP) mutation in the gibberellin insensitive dwarf 1 (GID1) peach gene causing brachytic dwarfism was described. In this research we wanted to validate this marker in an F2 population of the ‘Nectavantop’ peach cultivar (Nv) to include it as a marker assisted selection tool for peach breeding programs. Results The observed segregation of the trait was in agreement with that of a recessive gene, the individuals homozygous for the recessive allele (dwdw) presenting the dwarf genotype. Dw was mapped to the distal part of linkage group 6 as previously described. The SNP marker based on the causal mutation previously described did not segregate in Nv F2 population. The sequence of the GID1c gene in Nv revealed a second SNP in its coding sequence which cosegregated with the dwarf phenotype. This SNP was predicted by the SNAP2 software to cause a major functional change and was validated in the dwarf peach cultivar ‘Small sunning’. These results suggest the existence of at least two independent mutations of the Dw gene causing the peach brachytic dwarf phenotype. Electronic supplementary material The online version of this article (10.1186/s13104-018-3490-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Celia M Cantín
- IRTA, FruitCentre, Parc Científic i Tecnològic Agroalimentari de Lleida (PCiTAL), Edifici Fruitcentre, Parc de Gardeny, 25003, Lleida, Spain
| | - Pere Arús
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Cerdanyola del Vallès (Bellaterra), 08193, Barcelona, Spain
| | - Iban Eduardo
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Cerdanyola del Vallès (Bellaterra), 08193, Barcelona, Spain.
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Hou L, Cui Y, Li X, Chen W, Zhang Z, Pang X, Li Y. Genetic Evaluation of Natural Populations of the Endangered Conifer Thuja koraiensis Using Microsatellite Markers by Restriction-Associated DNA Sequencing. Genes (Basel) 2018; 9:E218. [PMID: 29673217 PMCID: PMC5924560 DOI: 10.3390/genes9040218] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 04/09/2018] [Accepted: 04/13/2018] [Indexed: 11/16/2022] Open
Abstract
Thuja koraiensis Nakai is an endangered conifer of high economic and ecological value in Jilin Province, China. However, studies on its population structure and conservation genetics have been limited by the lack of genomic data. Here, 37,761 microsatellites (simple sequence repeat, SSR) were detected based on 875,792 de novo-assembled contigs using a restriction-associated DNA (RAD) approach. Among these SSRs, 300 were randomly selected to test for polymorphisms and 96 obtained loci were able to amplify a fragment of expected size. Twelve polymorphic SSR markers were developed to analyze the genetic diversity and population structure of three natural populations. High genetic diversity (mean NA = 5.481, HE = 0.548) and moderate population differentiation (pairwise Fst = 0.048–0.078, Nm = 2.940–4.958) were found in this species. Molecular variance analysis suggested that most of the variation (83%) existed within populations. Combining the results of STRUCTURE, principal coordinate, and neighbor-joining analysis, the 232 individuals were divided into three genetic clusters that generally correlated with their geographical distributions. Finally, appropriate conservation strategies were proposed to protect this species. This study provides genetic information for the natural resource conservation and utilization of T. koraiensis and will facilitate further studies of the evolution and phylogeography of the species.
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Affiliation(s)
- Lu Hou
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Yanhong Cui
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Xiang Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Wu Chen
- The Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - Zhiyong Zhang
- Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
| | - Xiaoming Pang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Yingyue Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
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12
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López-Girona E, Zhang Y, Eduardo I, Mora JRH, Alexiou KG, Arús P, Aranzana MJ. A deletion affecting an LRR-RLK gene co-segregates with the fruit flat shape trait in peach. Sci Rep 2017; 7:6714. [PMID: 28751691 PMCID: PMC5532255 DOI: 10.1038/s41598-017-07022-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/20/2017] [Indexed: 01/01/2023] Open
Abstract
In peach, the flat phenotype is caused by a partially dominant allele in heterozygosis (Ss), fruits from homozygous trees (SS) abort a few weeks after fruit setting. Previous research has identified a SSR marker (UDP98-412) highly associated with the trait, found suitable for marker assisted selection (MAS). Here we report a ∼10 Kb deletion affecting the gene PRUPE.6G281100, 400 Kb upstream of UDP98-412, co-segregating with the trait. This gene is a leucine-rich repeat receptor-like kinase (LRR-RLK) orthologous to the Brassinosteroid insensitive 1-associated receptor kinase 1 (BAK1) group. PCR markers suitable for MAS confirmed its strong association with the trait in a collection of 246 cultivars. They were used to evaluate the DNA from a round fruit derived from a somatic mutation of the flat variety 'UFO-4', revealing that the mutation affected the flat associated allele (S). Protein BLAST alignment identified significant hits with genes involved in different biological processes. Best protein hit occurred with AtRLP12, which may functionally complement CLAVATA2, a key regulator that controls the stem cell population size. RT-PCR analysis revealed the absence of transcription of the partially deleted allele. The data support PRUPE.6G281100 as a candidate gene for flat shape in peach.
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Affiliation(s)
- Elena López-Girona
- IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Barcelona, Spain
| | - Yu Zhang
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, Barcelona, Spain
| | - Iban Eduardo
- IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Barcelona, Spain
| | | | | | - Pere Arús
- IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Barcelona, Spain
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Jia H, Yang H, Sun P, Li J, Zhang J, Guo Y, Han X, Zhang G, Lu M, Hu J. De novo transcriptome assembly, development of EST-SSR markers and population genetic analyses for the desert biomass willow, Salix psammophila. Sci Rep 2016; 6:39591. [PMID: 27995985 PMCID: PMC5171774 DOI: 10.1038/srep39591] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 11/25/2016] [Indexed: 12/27/2022] Open
Abstract
Salix psammophila, a sandy shrub known as desert willow, is regarded as a potential biomass feedstock and plays an important role in maintaining local ecosystems. However, a lack of genomic data and efficient molecular markers limit the study of its population evolution and genetic breeding. In this study, chromosome counts, flow cytometry and SSR analyses indicated that S. psammophila is tetraploid. A total of 6,346 EST-SSRs were detected based on 71,458 de novo assembled unigenes from transcriptome data. Twenty-seven EST-SSR markers were developed to evaluate the genetic diversity and population structure of S. psammophila from eight natural populations in Northern China. High levels of genetic diversity (mean 10.63 alleles per locus; mean HE 0.689) were dectected in S. psammophila. The weak population structure and little genetic differentiation (pairwise FST = 0.006-0.016) were found among Population 1-Population 7 (Pop1-Pop7; Inner Mongolia and Shaanxi), but Pop8 (Ningxia) was clearly separated from Pop1-Pop7 and moderate differentiation (pairwise FST = 0.045-0.055) was detected between them, which may be influenced by local habitat conditions. Molecular variance analyses indicated that most of the genetic variation (94.27%) existed within populations. These results provide valuable genetic informations for natural resource conservation and breeding programme optimisation of S. psammophila.
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Affiliation(s)
- Huixia Jia
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
| | - Haifeng Yang
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, 010019, China
| | - Pei Sun
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Jianbo Li
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Jin Zhang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Yinghua Guo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Xiaojiao Han
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Guosheng Zhang
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, 010019, China
| | - Mengzhu Lu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
| | - Jianjun Hu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
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Micheletti D, Dettori MT, Micali S, Aramini V, Pacheco I, Da Silva Linge C, Foschi S, Banchi E, Barreneche T, Quilot-Turion B, Lambert P, Pascal T, Iglesias I, Carbó J, Wang LR, Ma RJ, Li XW, Gao ZS, Nazzicari N, Troggio M, Bassi D, Rossini L, Verde I, Laurens F, Arús P, Aranzana MJ. Whole-Genome Analysis of Diversity and SNP-Major Gene Association in Peach Germplasm. PLoS One 2015; 10:e0136803. [PMID: 26352671 PMCID: PMC4564248 DOI: 10.1371/journal.pone.0136803] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 08/07/2015] [Indexed: 12/24/2022] Open
Abstract
Peach was domesticated in China more than four millennia ago and from there it spread world-wide. Since the middle of the last century, peach breeding programs have been very dynamic generating hundreds of new commercial varieties, however, in most cases such varieties derive from a limited collection of parental lines (founders). This is one reason for the observed low levels of variability of the commercial gene pool, implying that knowledge of the extent and distribution of genetic variability in peach is critical to allow the choice of adequate parents to confer enhanced productivity, adaptation and quality to improved varieties. With this aim we genotyped 1,580 peach accessions (including a few closely related Prunus species) maintained and phenotyped in five germplasm collections (four European and one Chinese) with the International Peach SNP Consortium 9K SNP peach array. The study of population structure revealed the subdivision of the panel in three main populations, one mainly made up of Occidental varieties from breeding programs (POP1OCB), one of Occidental landraces (POP2OCT) and the third of Oriental accessions (POP3OR). Analysis of linkage disequilibrium (LD) identified differential patterns of genome-wide LD blocks in each of the populations. Phenotypic data for seven monogenic traits were integrated in a genome-wide association study (GWAS). The significantly associated SNPs were always in the regions predicted by linkage analysis, forming haplotypes of markers. These diagnostic haplotypes could be used for marker-assisted selection (MAS) in modern breeding programs.
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Affiliation(s)
- Diego Micheletti
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra (Cerdanyola del Vallès), Barcelona, Spain
| | - Maria Teresa Dettori
- Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CRA), Centro di Ricerca per la Frutticoltura, Roma, Italy
| | - Sabrina Micali
- Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CRA), Centro di Ricerca per la Frutticoltura, Roma, Italy
| | - Valeria Aramini
- Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CRA), Centro di Ricerca per la Frutticoltura, Roma, Italy
| | - Igor Pacheco
- Università degli Studi di Milano, DiSAA, Milan, Italy
| | | | | | - Elisa Banchi
- Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige (TN), Italy
| | - Teresa Barreneche
- INRA, UMR 1332 de Biologie du Fruit et Pathologie, Villenave d’Ornon, France
- Univ. Bordeaux, UMR 1332 de Biologie du Fruit et Pathologie, Villenave d’Ornon, France
| | | | | | - Thierry Pascal
- INRA UR1052 GAFL, Domaine Saint Maurice, Montfavet, France
| | - Ignasi Iglesias
- IRTA, Estació Experimental de Lleida, Parc de Gardeny, Edifici Fruitcentre, Lleida, Spain
| | - Joaquim Carbó
- IRTA, Estacio Experimental Mas Badia, La Tallada d'Empordà, Girona, Spain
| | - Li-rong Wang
- Zhenzhou Fruit Research Institute, CAAS, Zhengzhou, China
| | - Rui-juan Ma
- Horticultural Institute, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Xiong-wei Li
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | - Zhong-shan Gao
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | | | - Michela Troggio
- Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige (TN), Italy
| | - Daniele Bassi
- Università degli Studi di Milano, DiSAA, Milan, Italy
| | - Laura Rossini
- Università degli Studi di Milano, DiSAA, Milan, Italy
- Parco Tecnologico Padano, Lodi, Italy
| | - Ignazio Verde
- Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CRA), Centro di Ricerca per la Frutticoltura, Roma, Italy
| | - François Laurens
- INRA, UMR 1345 Institut de Recherche en Horticulture et Semences, Beaucouzé, France
- Université d’Angers, UMR 1345 Institut de Recherche en Horticulture et Semences, SFR 4207 QUASAV, PRES L’UNAM, Angers, France
- AgroCampus-Ouest, UMR 1345 Institut de Recherche en Horticulture et Semences, Angers, France
| | - Pere Arús
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra (Cerdanyola del Vallès), Barcelona, Spain
| | - Maria José Aranzana
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra (Cerdanyola del Vallès), Barcelona, Spain
- * E-mail:
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15
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Gismondi A, Impei S, Di Marco G, Crespan M, Leonardi D, Canini A. Detection of new genetic profiles and allelic variants in improperly classified grapevine accessions. Genome 2014; 57:111-8. [DOI: 10.1139/gen-2013-0218] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thirty-seven grapevine accessions, collected in Central Italy, were characterized by morphological and genetic analysis, according to guidelines developed by European Union programs of grapevine research and standardization. Traditional denominations of some sampled varieties were revealed to be incorrect; moreover, 10 synonymies and 12 homonymies were recognized. Ampelographic and ampelometric measurements of leaf characters were performed. These data generated a phenotypic similarity matrix and a relative diagram showing morphological differences between specimens. Many samples presented different morphology even in the presence of the same genotype, probably as a result of various environmental pressures. Grapevines were typed by 12 microsatellite loci and then compared with the CRA-VIT genetic resource database. Twenty-five SSR profiles were clearly identified as well-known cultivars, while nine genotypes did not find a direct correspondence: these samples could represent putative new autochthonous Latial Vitis vinifera cultivars or hybrid varieties. The genetic approach also detected three new (169 and 173 in VVMD27 locus; 179 in ISV2 locus) and seven rare allelic variants. Plant sample classification by oral history, morphological observations, and molecular results were compared and discussed. Scions of samples were planted in the Botanic Garden of the University of Rome “Tor Vergata”, to preserve grapevine biodiversity and to protect possible new autochthonous varieties.
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Affiliation(s)
- A. Gismondi
- Department of Biology, University of Rome “Tor Vergata”, via della Ricerca Scientifica 1, Rome 00133, Italy
| | - S. Impei
- Department of Biology, University of Rome “Tor Vergata”, via della Ricerca Scientifica 1, Rome 00133, Italy
| | - G. Di Marco
- Department of Biology, University of Rome “Tor Vergata”, via della Ricerca Scientifica 1, Rome 00133, Italy
| | - M. Crespan
- Consiglio per la ricerca e la sperimentazione in agricoltura, Centro di ricerca per la viticoltura (CRA-VIT), viale XXVIII Aprile 26, Conegliano (TV) 31015, Italy
| | - D. Leonardi
- Department of Biology, University of Rome “Tor Vergata”, via della Ricerca Scientifica 1, Rome 00133, Italy
| | - A. Canini
- Department of Biology, University of Rome “Tor Vergata”, via della Ricerca Scientifica 1, Rome 00133, Italy
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Li XW, Meng XQ, Jia HJ, Yu ML, Ma RJ, Wang LR, Cao K, Shen ZJ, Niu L, Tian JB, Chen MJ, Xie M, Arus P, Gao ZS, Aranzana MJ. Peach genetic resources: diversity, population structure and linkage disequilibrium. BMC Genet 2013; 14:84. [PMID: 24041442 PMCID: PMC3848491 DOI: 10.1186/1471-2156-14-84] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 09/11/2013] [Indexed: 12/03/2022] Open
Abstract
Background Peach (Prunus persica (L.) Batsch) is one of the most important model fruits in the Rosaceae family. Native to the west of China, where peach has been domesticated for more than 4,000 years, its cultivation spread from China to Persia, Mediterranean countries and to America. Chinese peach has had a major impact on international peach breeding programs due to its high genetic diversity. In this research, we used 48 highly polymorphic SSRs, distributed over the peach genome, to investigate the difference in genetic diversity, and linkage disequilibrium (LD) among Chinese cultivars, and North American and European cultivars, and the evolution of current peach cultivars. Results In total, 588 alleles were obtained with 48 SSRs on 653 peach accessions, giving an average of 12.25 alleles per locus. In general, the average value of observed heterozygosity (0.47) was lower than the expected heterozygosity (0.60). The separate analysis of groups of accessions according to their origin or reproductive strategies showed greater variability in Oriental cultivars, mainly due to the high level of heterozygosity in Chinese landraces. Genetic distance analysis clustered the cultivars into two main groups: one included four wild related Prunus, and the other included most of the Oriental and Occidental landraces and breeding cultivars. STRUCTURE analysis assigned 469 accessions to three subpopulations: Oriental (234), Occidental (174), and Landraces (61). Nested STRUCTURE analysis divided the Oriental subpopulation into two different subpopulations: ‘Yu Lu’ and ‘Hakuho’. The Occidental breeding subpopulation was also subdivided into nectarine and peach subpopulations. Linkage disequilibrium (LD) analysis in each of these subpopulations showed that the percentage of linked (r2 > 0.1) intra-chromosome comparisons ranged between 14% and 47%. LD decayed faster in Oriental (1,196 Kbp) than in Occidental (2,687 Kbp) samples. In the ‘Yu Lu’ subpopulation there was considerable LD extension while no variation of LD with physical distance was observed in the landraces. From the first STRUCTURE result, LG1 had the greatest proportion of alleles in LD within all three subpopulations. Conclusions Our study demonstrates a high level of genetic diversity and relatively fast decay of LD in the Oriental peach breeding program. Inclusion of Chinese landraces will have a greater effect on increasing genetic diversity in Occidental breeding programs. Fingerprinting with genotype data for all 658 cultivars will be used for accession management in different germplasms. A higher density of markers are needed for association mapping in Oriental germplasm due to the low extension of LD. Population structure and evaluation of LD provides valuable information for GWAS experiment design in peach.
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Affiliation(s)
- Xiong-wei Li
- Department of Horticulture, Key Laboratory for Horticultural Plant Growth, Development and Quality Improvement of State Agriculture Ministry, Zhejiang University, Hangzhou 310058, China.
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17
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Kim NH, Choi HI, Ahn IO, Yang TJ. EST-SSR Marker Sets for Practical Authentication of All Nine Registered Ginseng Cultivars in Korea. J Ginseng Res 2013; 36:298-307. [PMID: 23717131 PMCID: PMC3659598 DOI: 10.5142/jgr.2012.36.3.298] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 04/04/2012] [Accepted: 04/04/2012] [Indexed: 11/30/2022] Open
Abstract
Panax ginseng has been cultivated for centuries, and nine commercial cultivars have been registered in Korea. However, these nine elite cultivars are grown in less than 10% of ginseng fields, and there is no clear authentication system for each cultivar even though their values are higher than those of local landraces. Here, we have developed 19 microsatellite markers using expressed gene sequences and established an authentication system for all nine cultivars. Five cultivars, ‘Chunpoong’, ‘Sunpoong’, ‘Gumpoong’, ‘Sunun’, and ‘Sunone’, can each be identified by one cultivar-unique allele, gm47n-a, gm47n-c, gm104-a, gm184-a (or gm129-a), and gm175-c, respectively. ‘Yunpoong’ can be identified by the co-appearance of gm47n-b and gm129-c. ‘Sunhyang’ can be distinguished from the other eight cultivars by the co-appearance of gm47n-b, gm129-b, and gm175-a. The two other cultivars, ‘Gopoong’ and ‘Cheongsun’, can be identified by their specific combinations of five marker alleles. This marker set was successfully utilized to identify the cultivars among 70 ginseng individuals and to select true F1 hybrid plants between two cultivars. We further analyzed the homogeneity of each cultivar and phylogenetic relationships among cultivars using these markers. This marker system will be useful to the seed industry and for breeding of ginseng.
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Affiliation(s)
- Nam-Hoon Kim
- Department of Plant Science, Plant Genomics and Breeding Institute, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
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18
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Fujii H, Ogata T, Shimada T, Endo T, Iketani H, Shimizu T, Yamamoto T, Omura M. Minimal marker: an algorithm and computer program for the identification of minimal sets of discriminating DNA markers for efficient variety identification. J Bioinform Comput Biol 2012; 11:1250022. [PMID: 23600813 DOI: 10.1142/s0219720012500229] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
DNA markers are frequently used to analyze crop varieties, with the coded marker data summarized in a computer-generated table. Such summary tables often provide extraneous data about individual crop genotypes, needlessly complicating and prolonging DNA-based differentiation between crop varieties. At present, it is difficult to identify minimal marker sets--the smallest sets that can distinguish between all crop varieties listed in a marker-summary table--due to the absence of algorithms capable of such characterization. Here, we describe the development of just such an algorithm and MinimalMarker, its accompanying Perl-based computer program. MinimalMarker has been validated in variety identification of fruit trees using published datasets and is available for use with both dominant and co-dominant markers, regardless of the number of alleles, including SSR markers with numeric notation. We expect that this program will prove useful not only to genomics researchers but also to government agencies that use DNA markers to support a variety of food-inspection and -labeling regulations.
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Affiliation(s)
- Hiroshi Fujii
- Citrus Research Division, NARO Institute of Fruit Tree Science, National Agriculture and Food Research Organization, 485-6 Okitsunaka-cho, Shimizu-ku, Shizuoka 424-0292, Japan.
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19
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Koepke T, Schaeffer S, Krishnan V, Jiwan D, Harper A, Whiting M, Oraguzie N, Dhingra A. Rapid gene-based SNP and haplotype marker development in non-model eukaryotes using 3'UTR sequencing. BMC Genomics 2012; 13:18. [PMID: 22239826 PMCID: PMC3293726 DOI: 10.1186/1471-2164-13-18] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 01/12/2012] [Indexed: 11/25/2022] Open
Abstract
Background Sweet cherry (Prunus avium L.), a non-model crop with narrow genetic diversity, is an important member of sub-family Amygdoloideae within Rosaceae. Compared to other important members like peach and apple, sweet cherry lacks in genetic and genomic information, impeding understanding of important biological processes and development of efficient breeding approaches. Availability of single nucleotide polymorphism (SNP)-based molecular markers can greatly benefit breeding efforts in such non-model species. RNA-seq approaches employing second generation sequencing platforms offer a unique avenue to rapidly identify gene-based SNPs. Additionally, haplotype markers can be rapidly generated from transcript-based SNPs since they have been found to be extremely utile in identification of genetic variants related to health, disease and response to environment as highlighted by the human HapMap project. Results RNA-seq was performed on two sweet cherry cultivars, Bing and Rainier using a 3' untranslated region (UTR) sequencing method yielding 43,396 assembled contigs. In order to test our approach of rapid identification of SNPs without any reference genome information, over 25% (10,100) of the contigs were screened for the SNPs. A total of 207 contigs from this set were identified to contain high quality SNPs. A set of 223 primer pairs were designed to amplify SNP containing regions from these contigs and high resolution melting (HRM) analysis was performed with eight important parental sweet cherry cultivars. Six of the parent cultivars were distantly related to Bing and Rainier, the cultivars used for initial SNP discovery. Further, HRM analysis was also performed on 13 seedlings derived from a cross between two of the parents. Our analysis resulted in the identification of 84 (38.7%) primer sets that demonstrated variation among the tested germplasm. Reassembly of the raw 3'UTR sequences using upgraded transcriptome assembly software yielded 34,620 contigs containing 2243 putative SNPs in 887 contigs after stringent filtering. Contigs with multiple SNPs were visually parsed to identify 685 putative haplotypes at 335 loci in 301 contigs. Conclusions This approach, which leverages the advantages of RNA-seq approaches, enabled rapid generation of gene-linked SNP and haplotype markers. The general approach presented in this study can be easily applied to other non-model eukaryotes irrespective of the ploidy level to identify gene-linked polymorphisms that are expected to facilitate efficient Gene Assisted Breeding (GAB), genotyping and population genetics studies. The identified SNP haplotypes reveal some of the allelic differences in the two sweet cherry cultivars analyzed. The identification of these SNP and haplotype markers is expected to significantly improve the genomic resources for sweet cherry and facilitate efficient GAB in this non-model crop.
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Affiliation(s)
- Tyson Koepke
- Department of Horticulture, Washington State University, Pullman, WA, USA
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20
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Aranzana MJ, Abbassi EK, Howad W, Arús P. Genetic variation, population structure and linkage disequilibrium in peach commercial varieties. BMC Genet 2010; 11:69. [PMID: 20646280 PMCID: PMC2915947 DOI: 10.1186/1471-2156-11-69] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2010] [Accepted: 07/20/2010] [Indexed: 12/16/2022] Open
Abstract
Background Peach [Prunus persica (L.) Batsch] is one of the most economically important fruit crops that, due to its genetic and biological characteristics (small genome size, taxonomic proximity to other important species and short juvenile period), has become a model plant in genomic studies of fruit trees. Our aim was an in-depth study of the extent, distribution and structure of peach genetic variation in North American and European commercial varieties as well as old Spanish varieties and several founders used in the early USA peach breeding programmes. For this we genotyped 224 peach cultivars using 50 SSRs evenly distributed along the 8 linkage groups of the Prunus reference map. Results Genetic distance analysis based on SSRs divided the peach cultivars in three main groups based mainly on their fruit characteristics: melting flesh peaches, melting flesh nectarines and non-melting varieties. Whereas non-melting flesh peaches had a higher number of alleles than melting peaches and nectarines, they were more homozygous. With some exceptions ('Admiral Dewey', 'Early Crawford' and 'Chinese Cling'), the founder US cultivars clustered together with the commercial melting peaches, indicating that their germplasm is well represented in modern cultivars. Population structure analysis showed a similar subdivision of the sample into subpopulations. Linkage disequilibrium (LD) analysis in three unstructured, or barely structured, subpopulations revealed a high level of LD conservation in peach extending up to 13-15 cM. Conclusions Using a much larger set of SSRs, our results confirm previous observations on peach variability and population structure and provide additional tools for breeding and breeders' rights enforcement. SSR data are also used for the estimation of marker mutation rates and allow pedigree inferences, particularly with founder genotypes of the currently grown cultivars, which are useful to understand the evolution of peach as a crop. Results on LD conservation can be explained by the self-pollinating nature of peach cultivated germplasm and by a bottleneck that occurred at the beginning of modern breeding practices. High LD suggests that the development of whole-genome scanning approaches is suitable for genetic studies of agronomically important traits in peach.
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Affiliation(s)
- Maria José Aranzana
- IRTA, Centre de Recerca en Agrigenòmica CSIC-IRTA-UAB, Carretera de Cabrils Km 2, 08348 Cabrils, Barcelona, Spain
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Garkava-Gustavsson L, Kolodinska Brantestam A, Sehic J, Nybom H. Molecular characterisation of indigenous Swedish apple cultivars based on SSR and S-allele analysis. Hereditas 2008; 145:99-112. [PMID: 18667000 DOI: 10.1111/j.0018-0661.2008.02042.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Trees of 68 apple cultivars, aimed for preservation by the 'National Program for diversity of cultivated plants' as mandate cultivars, were analysed using a set of 10 SSR (simple sequence repeat) primer pairs and the self-incompatibility (S-)locus to evaluate genetic diversity and reveal inter-cultivar relationships. The 12 polymorphic SSR loci exhibited 2 to 15 alleles, with expected heterozygozity (H(e)) ranging from 0.36 to 0.88 and a mean of 0.74. Numerous alleles were classified as rare or unique (35% and 18% respectively). For the S-locus, a total of 14 alleles were identified in this study. Five alleles, S1-S3, S5 and S7 had frequencies ranging from 11 to 18%, whereas the remaining 9 alleles were below 6%. All sexually obtained cultivars could be distinguished with the set of SSR loci. Sports were identical with their progenitors in two cases, but differed in one SSR allele in a third case. An SSR-based dendrogram, based on Roger's genetic distances, did not reveal any clear pattern of clustering. The genetic distances were, however, correlated with a corresponding matrix obtained in a previously conducted RAPD-based study of the same cultivars. Non-mandate parents of Swedish mandate cultivars together with some other reference cultivars were included in this study to check the accuracy of allele scoring, verify parentage and compare the results of this study with those presented in previously published studies. Some discrepancies in allele sizing were revealed and the possibilities of avoiding this problem are discussed.
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Affiliation(s)
- L Garkava-Gustavsson
- Balsgård-Department of Plant Breeding and Biotechnology, Swedish University of Agricultural Sciences, Kristianstad, Sweden.
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22
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Garkava-Gustavsson L, Kolodinska Brantestam A, Sehic J, Nybom H. Molecular characterisation of indigenous Swedish apple cultivars based on SSR and S-allele analysis. Hereditas 2008. [DOI: 10.1111/j.0018-0661.2008.2042.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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23
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Testone G, Bruno L, Condello E, Chiappetta A, Bruno A, Mele G, Tartarini A, Spanò L, Innocenti AM, Mariotti D, Bitonti MB, Giannino D. Peach [Prunus persica (L.) Batsch] KNOPE1, a class 1 KNOX orthologue to Arabidopsis BREVIPEDICELLUS/KNAT1, is misexpressed during hyperplasia of leaf curl disease. JOURNAL OF EXPERIMENTAL BOTANY 2008; 59:389-402. [PMID: 18250078 DOI: 10.1093/jxb/erm317] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Class 1 KNOTTED-like (KNOX) transcription factors control cell meristematic identity. An investigation was carried out to determine whether they maintain this function in peach plants and might act in leaf curliness caused by the ascomycete Taphrina deformans. KNOPE1 function was assessed by overexpression in Arabidopsis and by yeast two-hybrid assays with Arabidopsis BELL proteins. Subsequently, KNOPE1 mRNA and zeatin localization was monitored during leaf curl disease. KNOPE1 and Arabidopsis BREVIPEDICELLUS (BP) proteins fell into the same phyletic group and recognized the same BELL factors. 35S:KNOPE1 Arabidopsis lines exhibited altered traits resembling those of BP-overexpressing lines. In peach shoot apical meristem, KNOPE1 was expressed in the peripheral and central zones but not in leaf primordia, identically to the BP expression pattern. These results strongly suggest that KNOPE1 must be down-regulated for leaf initiation and that it can control cell meristem identity equally as well as all class 1 KNOX genes. Leaves attacked by T. deformans share histological alterations with class 1 KNOX-overexpressing leaves, including cell proliferation and loss of cell differentiation. Both KNOPE1 and a cytokinin synthesis ISOPENTENYLTRANSFERASE gene were found to be up-regulated in infected curled leaves. At early disease stages, KNOPE1 was uniquely triggered in the palisade cells interacting with subepidermal mycelium, while zeatin vascular localization was unaltered compared with healthy leaves. Subsequently, when mycelium colonization and asci development occurred, both KNOPE1 and zeatin signals were scattered in sectors of cell disorders. These results suggest that KNOPE1 misexpression and de novo zeatin synthesis of host origin might participate in hyperplasia of leaf curl disease.
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Affiliation(s)
- Giulio Testone
- Institute of Biology and Agricultural Biotechnology, National Research Council of Italy (CNR), via Salaria km 29,300, 00015 Monterotondo Scalo, Rome, Italy
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Sarri V, Baldoni L, Porceddu A, Cultrera NGM, Contento A, Frediani M, Belaj A, Trujillo I, Cionini PG. Microsatellite markers are powerful tools for discriminating among olive cultivars and assigning them to geographically defined populations. Genome 2007; 49:1606-15. [PMID: 17426775 DOI: 10.1139/g06-126] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Twelve simple sequence repeat (SSR) loci were used to differentiate among 118 cultivars sampled in several countries of the Mediterranean basin and to analyze the genetic structure of olive cultivar gene pools. The markers were found to have high discrimination power. On average, with a single assay it was possible to discriminate 96% of the pairwise comparisons and, with a combination of 3 loci, virtually all cultivars were distinguished. The SSR markers were also tested for their ability to assign cultivars to their geographic population of origin. A selection of 6 loci was found to maximize assignment accuracy, correctly reallocating up to 75.4% of cultivars to their population of origin. Because of the confusion surrounding the origin of most olive cultivars, their molecular identification and ascertainment of origin will be extremely useful for germplasm management and breeding.
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Affiliation(s)
- V Sarri
- Dipartimento di Biologia Cellulare e Ambientale, Sezione di Biologia Cellulare e Molecolare, Università di Perugia, Via Elce di Sotto, 06123 Perugia, Italy
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Yoon MS, Song QJ, Choi IY, Specht JE, Hyten DL, Cregan PB. BARCSoySNP23: a panel of 23 selected SNPs for soybean cultivar identification. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2007; 114:885-99. [PMID: 17219205 DOI: 10.1007/s00122-006-0487-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2005] [Accepted: 12/16/2006] [Indexed: 05/11/2023]
Abstract
This report describes a set of 23 informative SNPs (BARCSoySNP23) distributed on 19 of the 20 soybean linkage groups that can be used for soybean cultivar identification. Selection of the SNPs to include in this set was made based upon the information provided by each SNP for distinguishing a diverse set of soybean genotypes as well as the linkage map position of each SNP. The genotypes included the ancestors of North American cultivars, modern North American cultivars and a group of Korean cultivars. The procedure used to identify this subset of highly informative SNP markers resulted in a significant increase in the power of identification versus any other randomly selected set of equal number. This conclusion was supported by a simulation which indicated that the 23-SNP panel can uniquely distinguish 2,200 soybean cultivars, whereas sets of randomly selected 23-SNP panels allowed the unique identification of only about 50 cultivars. The 23-SNP panel can efficiently distinguish each of the genotypes within four maturity group sets of additional cultivars/lines that have identical classical pigmentation and morphological traits. Comparatively, the 13 trinucleotide SSR set published earlier (BARCSoySSR13) has more power on a per locus basis because of the multi-allelic nature of SSRs. However, the assay of bi-allelic SNP loci can be multi-plexed using non-gel based techniques allowing for rapid determination of the SNP alleles present in soybean genotypes, thereby compensating for their relatively low information content. Both BARCSoySNP23 and BARCSoySSR13 were highly congruent relative to identifying genotypes and for estimating population genetic differences.
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Affiliation(s)
- M S Yoon
- Genetic Resources Division, National Institute of Agricultural Biotechnology, Rural Development Administration, Suwon, 441-707, South Korea
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BARCSoySNP23: a panel of 23 selected SNPs for soybean cultivar identification. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2007. [PMID: 17219205 DOI: 10.1007/s00122‐006‐0487‐8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
This report describes a set of 23 informative SNPs (BARCSoySNP23) distributed on 19 of the 20 soybean linkage groups that can be used for soybean cultivar identification. Selection of the SNPs to include in this set was made based upon the information provided by each SNP for distinguishing a diverse set of soybean genotypes as well as the linkage map position of each SNP. The genotypes included the ancestors of North American cultivars, modern North American cultivars and a group of Korean cultivars. The procedure used to identify this subset of highly informative SNP markers resulted in a significant increase in the power of identification versus any other randomly selected set of equal number. This conclusion was supported by a simulation which indicated that the 23-SNP panel can uniquely distinguish 2,200 soybean cultivars, whereas sets of randomly selected 23-SNP panels allowed the unique identification of only about 50 cultivars. The 23-SNP panel can efficiently distinguish each of the genotypes within four maturity group sets of additional cultivars/lines that have identical classical pigmentation and morphological traits. Comparatively, the 13 trinucleotide SSR set published earlier (BARCSoySSR13) has more power on a per locus basis because of the multi-allelic nature of SSRs. However, the assay of bi-allelic SNP loci can be multi-plexed using non-gel based techniques allowing for rapid determination of the SNP alleles present in soybean genotypes, thereby compensating for their relatively low information content. Both BARCSoySNP23 and BARCSoySSR13 were highly congruent relative to identifying genotypes and for estimating population genetic differences.
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Moncada X, Pelsy F, Merdinoglu D, Hinrichsen P. Genetic diversity and geographical dispersal in grapevine clones revealed by microsatellite markers. Genome 2006; 49:1459-72. [PMID: 17426761 DOI: 10.1139/g06-102] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Intravarietal genetic diversification associated with geographical dispersal of a vegetatively propagated species was studied using grapevine Vitis vinifera L. ‘Cabernet Sauvignon’ as a model. Fifty-nine clonal samples obtained from 7 countries (France, Chile, Spain, Australia, Hungary, USA, and Italy) were analyzed using 84 microsatellite markers. Eighteen polymorphic microsatellite loci (21.4%) were detected, finding 22 different genotypes in the population analyzed with a genetic similarity of over 97%. The presence of chimeric clones was evidenced at locus VMC5g7 by means of a segregation analysis of descendants by self-pollination of a triallelic Chilean clone and by somatic embryogenesis analysis, showing a mutation in L2 cell layer. Only 2 clones (obtained from France and Australia) presented the ancestral genotype, and the most divergent genotype was exhibited by another French clone, which had accumulated 5 somatic mutations. The 2 largest populations considered (from France and Chile) showed a clear divergency in the polymorphisms detected. These antecedents enabled the tracing of geographical dispersal with a phylogenetic hypothesis supporting France as the center of origin of diversification of Cabernet Sauvignon. The results obtained could help to explain diversification processes in other grapevine cultivars. The possibility that this kind of genetic variability occurs in other vegetatively propagated species is discussed, focusing on possible fingerprinting applications.
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Affiliation(s)
- Ximena Moncada
- Laboratorio de Biotecnología, Centro de Investigación La Platina, Instituto de Investigaciones Agropecuarias, INIA, Chile, PO Box 439-3 Santiago, Chile
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Xu Y, Ma RC, Xie H, Liu JT, Cao MQ. Development of SSR markers for the phylogenetic analysis of almond trees from China and the Mediterranean region. Genome 2005; 47:1091-104. [PMID: 15644967 DOI: 10.1139/g04-058] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Expressed sequence tag (EST) derived simple sequence repeats (SSRs, microsatellites) were screened and identified from 3863 almond and 10 185 peach EST sequences, and the spectra of SSRs in the non-redundant EST sequences were investigated after sequence assembly. One hundred seventy-eight (12.07%) almond SSRs and 497 (9.97%) peach SSRs were detected. The EST-SSR occurs every 4.97 kb in almond ESTs and 6.57 kb in peach, and SSRs with di- and trinucleotide repeat motifs are the most abundant in both almond and peach ESTs. Twenty one EST-SSRs were thereafter, developed and used together with 7 genomic SSRs, to study the genetic relationship among 36 almond (P. communis Fritsch.) cultivars from China and the Mediterranean area, as well as 8 accessions of other related species from the genus Prunus. Both EST-derived and genomic SSR markers showed high cross-species transferability in the genus. Out of the 112 polymorphic alleles detected in the 36 cultivated almonds, 28 are specific to Chinese cultivars and 25 to the others. The 44 accessions were clustered into 4 groups in the phylogenetic tree and the 36 almond cultivars formed two distinct subgroups, one containing only Chinese cultivars and one of unknown origin and the other only those originating from the Mediterranean area, indicating that Chinese almond cultivars have a distinct evolutionary history from the Mediterranean almond. Our preliminary results indicated that common almond was more closely related to peach (P. persica (L.) Batsch.) than to the four wild species of almond, (P. mongolica Maxim., P. ledebouriana Schleche, P. tangutica Batal., and P. triloba Lindl.). The implications of these SSR markers for evolutionary analysis and molecular mapping of Prunus species are discussed.
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Affiliation(s)
- Yong Xu
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Ban-Jing., Hai-Dian District, Beijing 100089, China
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