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Tumas H, Ilska JJ, Gérardi S, Laroche J, A’Hara S, Boyle B, Janes M, McLean P, Lopez G, Lee SJ, Cottrell J, Gorjanc G, Bousquet J, Woolliams JA, MacKay JJ. High-density genetic linkage mapping in Sitka spruce advances the integration of genomic resources in conifers. G3 (BETHESDA, MD.) 2024; 14:jkae020. [PMID: 38366548 PMCID: PMC10989875 DOI: 10.1093/g3journal/jkae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/03/2024] [Indexed: 02/18/2024]
Abstract
In species with large and complex genomes such as conifers, dense linkage maps are a useful resource for supporting genome assembly and laying the genomic groundwork at the structural, populational, and functional levels. However, most of the 600+ extant conifer species still lack extensive genotyping resources, which hampers the development of high-density linkage maps. In this study, we developed a linkage map relying on 21,570 single nucleotide polymorphism (SNP) markers in Sitka spruce (Picea sitchensis [Bong.] Carr.), a long-lived conifer from western North America that is widely planted for productive forestry in the British Isles. We used a single-step mapping approach to efficiently combine RAD-seq and genotyping array SNP data for 528 individuals from 2 full-sib families. As expected for spruce taxa, the saturated map contained 12 linkages groups with a total length of 2,142 cM. The positioning of 5,414 unique gene coding sequences allowed us to compare our map with that of other Pinaceae species, which provided evidence for high levels of synteny and gene order conservation in this family. We then developed an integrated map for P. sitchensis and Picea glauca based on 27,052 markers and 11,609 gene sequences. Altogether, these 2 linkage maps, the accompanying catalog of 286,159 SNPs and the genotyping chip developed, herein, open new perspectives for a variety of fundamental and more applied research objectives, such as for the improvement of spruce genome assemblies, or for marker-assisted sustainable management of genetic resources in Sitka spruce and related species.
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Affiliation(s)
- Hayley Tumas
- Department of Biology, University of Oxford, Oxford OX1 3RB, UK
| | - Joana J Ilska
- The Roslin Institute, Royal (Dick) School of Veterinary Science, University of Edinburgh, Midlothian EH25 9RG, UK
| | - Sebastien Gérardi
- Canada Research Chair in Forest Genomics, Forest Research Centre, Université Laval, Québec, QC GIV 0A6, Canada
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC GIV 0A6, Canada
| | - Jerome Laroche
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC GIV 0A6, Canada
| | - Stuart A’Hara
- Forest Research, Northern Research Station, Midlothian EH25 9SY, UK
| | - Brian Boyle
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC GIV 0A6, Canada
| | - Mateja Janes
- The Roslin Institute, Royal (Dick) School of Veterinary Science, University of Edinburgh, Midlothian EH25 9RG, UK
| | - Paul McLean
- Forest Research, Northern Research Station, Midlothian EH25 9SY, UK
| | - Gustavo Lopez
- Forest Research, Northern Research Station, Midlothian EH25 9SY, UK
| | - Steve J Lee
- Forest Research, Northern Research Station, Midlothian EH25 9SY, UK
| | - Joan Cottrell
- Forest Research, Northern Research Station, Midlothian EH25 9SY, UK
| | - Gregor Gorjanc
- The Roslin Institute, Royal (Dick) School of Veterinary Science, University of Edinburgh, Midlothian EH25 9RG, UK
| | - Jean Bousquet
- Canada Research Chair in Forest Genomics, Forest Research Centre, Université Laval, Québec, QC GIV 0A6, Canada
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC GIV 0A6, Canada
| | - John A Woolliams
- The Roslin Institute, Royal (Dick) School of Veterinary Science, University of Edinburgh, Midlothian EH25 9RG, UK
| | - John J MacKay
- Department of Biology, University of Oxford, Oxford OX1 3RB, UK
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Duan Y, Chen Q, Chen Q, Zheng K, Cai Y, Long Y, Zhao J, Guo Y, Sun F, Qu Y. Analysis of transcriptome data and quantitative trait loci enables the identification of candidate genes responsible for fiber strength in Gossypium barbadense. G3 GENES|GENOMES|GENETICS 2022; 12:6650278. [PMID: 35881688 PMCID: PMC9434320 DOI: 10.1093/g3journal/jkac167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 06/23/2022] [Indexed: 11/13/2022]
Abstract
Gossypium barbadense possesses a superior fiber quality because of its fiber length and strength. An in-depth analysis of the underlying genetic mechanism could aid in filling the gap in research regarding fiber strength and could provide helpful information for Gossypium barbadense breeding. Three quantitative trait loci related to fiber strength were identified from a Gossypium barbadense recombinant inbred line (PimaS-7 × 5917) for further analysis. RNA sequencing was performed in the fiber tissues of PimaS-7 × 5917 0–35 days postanthesis. Four specific modules closely related to the secondary wall-thickening stage were obtained using the weighted gene coexpression network analysis. In total, 55 genes were identified as differentially expressed from 4 specific modules. Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes were used for enrichment analysis, and Gbar_D11G032910, Gbar_D08G020540, Gbar_D08G013370, Gbar_D11G033670, and Gbar_D11G029020 were found to regulate fiber strength by playing a role in the composition of structural constituents of cytoskeleton and microtubules during fiber development. Quantitative real-time PCR results confirmed the accuracy of the transcriptome data. This study provides a quick strategy for exploring candidate genes and provides new insights for improving fiber strength in cotton.
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Affiliation(s)
- Yajie Duan
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Qin Chen
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Quanjia Chen
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Kai Zheng
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Yongsheng Cai
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Yilei Long
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Jieyin Zhao
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Yaping Guo
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Fenglei Sun
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
| | - Yanying Qu
- College of Agronomy, Xinjiang Agricultural University , Urumqi, Xinjiang 830052, China
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Korolyova N, Buechling A, Lieutier F, Yart A, Cudlín P, Turčáni M, Jakuš R. Primary and secondary host selection by Ips typographus depends on Norway spruce crown characteristics and phenolic-based defenses. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 321:111319. [PMID: 35696919 DOI: 10.1016/j.plantsci.2022.111319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 05/05/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Climate change is expected to intensify bark beetle population outbreaks in forests globally, affecting biodiversity and trajectories of change. Aspects of individual tree resistance remain poorly quantified, particularly with regard to the role of phenolic compounds, hindering robust predictions of forest response to future conditions. In 2003, we conducted a mechanical wounding experiment in a Norway spruce forest that coincided with an outbreak of the bark beetle, Ips typographus. We collected phloem samples from 97 trees and monitored tree survival for 5 months. Using high-performance liquid chromatography, we quantified induced changes in the concentrations of phenolics. Classification and regression tools were used to evaluate relationships between phenolic production and bark beetle resistance, in the context of other survival factors. The proximity of beetle source populations was a principal determinant of survival. Proxy measures of tree vigor, such as crown defoliation, mediated tree resistance. Controlling for these factors, synthesis of catechin was found to exponentially increase tree survival probability. However, even resistant trees were susceptible in late season due to high insect population growth. Our results show that incorporating trait-mediated effects improves predictions of survival. Using an integrated analytical approach, we demonstrate that phenolics play a direct role in tree defense to herbivory.
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Affiliation(s)
- Nataliya Korolyova
- Fac. of Forestry and Wood Sciences, Czech Univ. of Life Sciences, Kamýcká 129, 165 00 Praha-Suchdol, Czech Republic.
| | - Arne Buechling
- Fac. of Forestry and Wood Sciences, Czech Univ. of Life Sciences, Kamýcká 129, 165 00 Praha-Suchdol, Czech Republic.
| | - François Lieutier
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d'Orléans, B.P. 6749, F-45067 Orléans, France.
| | - Annie Yart
- Institut National de la Recherche Agronomique, Zoologie Forestiere, Ardon, 45160 Olivet, France.
| | - Pavel Cudlín
- Global Change Research Institute of the Czech Academy of Sciences, Department of Carbon Storage in the Landscape, Bělidla 986/4a, 603 00 Brno, Czech Republic.
| | - Marek Turčáni
- Fac. of Forestry and Wood Sciences, Czech Univ. of Life Sciences, Kamýcká 129, 165 00 Praha-Suchdol, Czech Republic.
| | - Rastislav Jakuš
- Fac. of Forestry and Wood Sciences, Czech Univ. of Life Sciences, Kamýcká 129, 165 00 Praha-Suchdol, Czech Republic; Inst. of Forest Ecology, Slovak Acad. of Sciences, Ľ. Štúra 2, 960 53 Zvolen, Slovak Republic.
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Zhu X, Weng Q, Bush D, Zhou C, Zhao H, Wang P, Li F. High-density genetic linkage mapping reveals low stability of QTLs across environments for economic traits in Eucalyptus. FRONTIERS IN PLANT SCIENCE 2022; 13:1099705. [PMID: 37082511 PMCID: PMC10112524 DOI: 10.3389/fpls.2022.1099705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/28/2022] [Indexed: 05/03/2023]
Abstract
Introduction Eucalyptus urophylla, E. tereticornis and their hybrids are the most important commercial forest tree species in South China where they are grown for pulpwood and solid wood production. Construction of a fine-scale genetic linkage map and detecting quantitative trait loci (QTL) for economically important traits linked to these end-uses will facilitate identification of the main candidate genes and elucidate the regulatory mechanisms. Method A high-density consensus map (a total of 2754 SNPs with 1359.18 cM) was constructed using genotyping by sequencing (GBS) on clonal progenies of E. urophylla × tereticornis hybrids. QTL mapping of growth and wood property traits were conducted in three common garden experiments, resulting in a total of 108 QTLs. A total of 1052 candidate genes were screened by the efficient combination of QTL mapping and transcriptome analysis. Results Only ten QTLs were found to be stable across two environments, and only one (qSG10Stable mapped on chromosome 10, and associated with lignin syringyl-to-guaiacyl ratio) was stable across all three environments. Compared to other QTLs, qSG10Stable explained a very high level of phenotypic variation (18.4-23.6%), perhaps suggesting that QTLs with strong effects may be more stably inherited across multiple environments. Screened candidate genes were associated with some transcription factor families, such as TALE, which play an important role in the secondary growth of plant cell walls and the regulation of wood formation. Discussion While QTLs such as qSG10Stable, found to be stable across three sites, appear to be comparatively uncommon, their identification is likely to be a key to practical QTL-based breeding. Further research involving clonally-replicated populations, deployed across multiple target planting sites, will be required to further elucidate QTL-by-environment interactions.
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Affiliation(s)
- Xianliang Zhu
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
| | - Qijie Weng
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
| | - David Bush
- Commonwealth Scientific and Industrial Research Organisation (CRISO) Australian Tree Seed Centre, Canberra, ACT, Australia
| | - Changpin Zhou
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
| | - Haiwen Zhao
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
| | - Ping Wang
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
| | - Fagen Li
- Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, China
- *Correspondence: Fagen Li,
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