Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping

Abstract Durumwheat [Triticum turgidum L. ssp. durum (Desf.)] production is constrained by fungal diseases including stripe rust caused by Puccinia striiformis Westend. f. sp. tritici Erikss. (Pst). Continuous mining of germplasm for the discovery and deployment of stripe rust resistance (Yr) genes...

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Autores principales:	Meriem Aoun, Xianming Chen, Mohamed Somo, Steven S. Xu, Xuehui Li, Elias M. Elias
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Plant culture SB1-1110 Genetics QH426-470
Acceso en línea:	https://doaj.org/article/e55e1953f1024d6eab6bef6fcc13949e
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spelling	oai:doaj.org-article:e55e1953f1024d6eab6bef6fcc13949e2021-12-05T07:50:12ZNovel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping1940-337210.1002/tpg2.20136https://doaj.org/article/e55e1953f1024d6eab6bef6fcc13949e2021-11-01T00:00:00Zhttps://doi.org/10.1002/tpg2.20136https://doaj.org/toc/1940-3372Abstract Durumwheat [Triticum turgidum L. ssp. durum (Desf.)] production is constrained by fungal diseases including stripe rust caused by Puccinia striiformis Westend. f. sp. tritici Erikss. (Pst). Continuous mining of germplasm for the discovery and deployment of stripe rust resistance (Yr) genes is needed to counter the impact of this disease. In this study, we evaluated a worldwide collection of 432 durum wheat accessions to seven U.S. Pst races that carry diverse virulence and avirulence combinations on wheat Yr genes. We found that 47–82% of the durum wheat accessions were susceptible to each of the tested Pst races. A total of 32 accessions were resistant to all seven races. Genome‐wide association studies (GWAS) using over 97,000 single‐nucleotide polymorphism markers generated from genotyping‐by‐sequencing of 364 accessions identified 56 quantitative trait loci (QTL) associated with all‐stage stripe rust resistance located on all 14 durum wheat chromosomes. Six of these QTL were associated with resistance to 2–4 Pst races, and none were associated with resistance to all seven races. The remaining 50 QTL were race specific. Eighteen of the 56 identified QTL had relatively large effects against at least one of the races. A map‐based comparison of the discovered QTL in this study with previously published Yr genes and QTL showed that 29 were previously identified, whereas the remaining 27 QTL appeared to be novel. This study reports effective sources of stripe rust resistance to contemporary races in the United States and shows that this durum wheat collection is abundant in novel resistance loci that can be transferred into adapted durum cultivars.Meriem AounXianming ChenMohamed SomoSteven S. XuXuehui LiElias M. EliasWileyarticlePlant cultureSB1-1110GeneticsQH426-470ENThe Plant Genome, Vol 14, Iss 3, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Plant culture SB1-1110 Genetics QH426-470
spellingShingle	Plant culture SB1-1110 Genetics QH426-470 Meriem Aoun Xianming Chen Mohamed Somo Steven S. Xu Xuehui Li Elias M. Elias Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
description	Abstract Durumwheat [Triticum turgidum L. ssp. durum (Desf.)] production is constrained by fungal diseases including stripe rust caused by Puccinia striiformis Westend. f. sp. tritici Erikss. (Pst). Continuous mining of germplasm for the discovery and deployment of stripe rust resistance (Yr) genes is needed to counter the impact of this disease. In this study, we evaluated a worldwide collection of 432 durum wheat accessions to seven U.S. Pst races that carry diverse virulence and avirulence combinations on wheat Yr genes. We found that 47–82% of the durum wheat accessions were susceptible to each of the tested Pst races. A total of 32 accessions were resistant to all seven races. Genome‐wide association studies (GWAS) using over 97,000 single‐nucleotide polymorphism markers generated from genotyping‐by‐sequencing of 364 accessions identified 56 quantitative trait loci (QTL) associated with all‐stage stripe rust resistance located on all 14 durum wheat chromosomes. Six of these QTL were associated with resistance to 2–4 Pst races, and none were associated with resistance to all seven races. The remaining 50 QTL were race specific. Eighteen of the 56 identified QTL had relatively large effects against at least one of the races. A map‐based comparison of the discovered QTL in this study with previously published Yr genes and QTL showed that 29 were previously identified, whereas the remaining 27 QTL appeared to be novel. This study reports effective sources of stripe rust resistance to contemporary races in the United States and shows that this durum wheat collection is abundant in novel resistance loci that can be transferred into adapted durum cultivars.
format	article
author	Meriem Aoun Xianming Chen Mohamed Somo Steven S. Xu Xuehui Li Elias M. Elias
author_facet	Meriem Aoun Xianming Chen Mohamed Somo Steven S. Xu Xuehui Li Elias M. Elias
author_sort	Meriem Aoun
title	Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
title_short	Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
title_full	Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
title_fullStr	Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
title_full_unstemmed	Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
title_sort	novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/e55e1953f1024d6eab6bef6fcc13949e
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Novel stripe rust all‐stage resistance loci identified in a worldwide collection of durum wheat using genome‐wide association mapping

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