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Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)

Uncovering the genetic basis and optimizing the late blight tolerance trait in potatoes (Solanum tuberosum L.) are crucial for potato breeding. Late blight disease is one of the most significant diseases hindering potato production. The traits of late blight tolerance were evaluated for 284 potato c...

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Autores principales: Wang, Fang, Zou, Meiling, Zhao, Long, Xia, Zhiqiang, Wang, Jian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8517323/
https://www.ncbi.nlm.nih.gov/pubmed/34659338
http://dx.doi.org/10.3389/fgene.2021.714575
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author Wang, Fang
Zou, Meiling
Zhao, Long
Xia, Zhiqiang
Wang, Jian
author_facet Wang, Fang
Zou, Meiling
Zhao, Long
Xia, Zhiqiang
Wang, Jian
author_sort Wang, Fang
collection PubMed
description Uncovering the genetic basis and optimizing the late blight tolerance trait in potatoes (Solanum tuberosum L.) are crucial for potato breeding. Late blight disease is one of the most significant diseases hindering potato production. The traits of late blight tolerance were evaluated for 284 potato cultivars to identify loci significantly associated with the late blight tolerance trait. Of all, 37 and 15 were the most tolerant to disease, and 107 and 30 were the most susceptible. A total of 22,489 high-quality single-nucleotide polymorphisms and indels were identified in 284 potato cultivars. All the potato cultivars were clustered into eight subgroups using population structure analysis and principal component analysis, which were consistent with the results of the phylogenetic tree analysis. The average genetic diversity for all 284 potato cultivars was 0.216, and the differentiation index of each subgroup was 0.025–0.149. Genome-wide linkage disequilibrium (LD) analysis demonstrated that the average LD was about 0.9 kb. A genome-wide association study using a mixed linear model identified 964 loci significantly associated with the late blight tolerance trait. Fourteen candidate genes for late blight tolerance traits were identified, including genes encoding late blight tolerance protein, chitinase 1, cytosolic nucleotide-binding site–leucine-rich repeat tolerance protein, protein kinase, ethylene-responsive transcription factor, and other potential plant tolerance-related proteins. This study provides novel insights into the genetic architecture of late blight tolerance traits and will be helpful for late blight tolerance in potato breeding.
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spelling pubmed-85173232021-10-16 Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.) Wang, Fang Zou, Meiling Zhao, Long Xia, Zhiqiang Wang, Jian Front Genet Genetics Uncovering the genetic basis and optimizing the late blight tolerance trait in potatoes (Solanum tuberosum L.) are crucial for potato breeding. Late blight disease is one of the most significant diseases hindering potato production. The traits of late blight tolerance were evaluated for 284 potato cultivars to identify loci significantly associated with the late blight tolerance trait. Of all, 37 and 15 were the most tolerant to disease, and 107 and 30 were the most susceptible. A total of 22,489 high-quality single-nucleotide polymorphisms and indels were identified in 284 potato cultivars. All the potato cultivars were clustered into eight subgroups using population structure analysis and principal component analysis, which were consistent with the results of the phylogenetic tree analysis. The average genetic diversity for all 284 potato cultivars was 0.216, and the differentiation index of each subgroup was 0.025–0.149. Genome-wide linkage disequilibrium (LD) analysis demonstrated that the average LD was about 0.9 kb. A genome-wide association study using a mixed linear model identified 964 loci significantly associated with the late blight tolerance trait. Fourteen candidate genes for late blight tolerance traits were identified, including genes encoding late blight tolerance protein, chitinase 1, cytosolic nucleotide-binding site–leucine-rich repeat tolerance protein, protein kinase, ethylene-responsive transcription factor, and other potential plant tolerance-related proteins. This study provides novel insights into the genetic architecture of late blight tolerance traits and will be helpful for late blight tolerance in potato breeding. Frontiers Media S.A. 2021-10-01 /pmc/articles/PMC8517323/ /pubmed/34659338 http://dx.doi.org/10.3389/fgene.2021.714575 Text en Copyright © 2021 Wang, Zou, Zhao, Xia and Wang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Genetics
Wang, Fang
Zou, Meiling
Zhao, Long
Xia, Zhiqiang
Wang, Jian
Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title_full Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title_fullStr Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title_full_unstemmed Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title_short Genome-Wide Association Mapping of Late Blight Tolerance Trait in Potato (Solanum tuberosum L.)
title_sort genome-wide association mapping of late blight tolerance trait in potato (solanum tuberosum l.)
topic Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8517323/
https://www.ncbi.nlm.nih.gov/pubmed/34659338
http://dx.doi.org/10.3389/fgene.2021.714575
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