Heat Stress Tolerance 2 confers basal heat stress tolerance in allohexaploid wheat (Triticum aestivum L.)

Heat Stress Tolerance 2 confers basal heat stress tolerance in allohexaploid wheat (Triticum aestivum L.)

© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Détails bibliographiques
Publié dans:Journal of experimental botany. - 1985. - 73(2022), 19 vom: 02. Nov., Seite 6600-6614
Auteur principal: Zhang, Runqi (Auteur)
Autres auteurs: Liu, Guoyu, Xu, Huanwen, Lou, Hongyao, Zhai, Shanshan, Chen, Aiyan, Hao, Shuiyuan, Xing, Jiewen, Liu, Jie, You, Mingshan, Zhang, Yufeng, Xie, Chaojie, Ma, Jun, Liang, Rongqi, Sun, Qixin, Zhai, Huijie, Ni, Zhongfu, Li, Baoyun
Format: Article en ligne
Langue:English
Publié: 2022
Accès à la collection:Journal of experimental botany
Sujets:Journal Article Research Support, Non-U.S. Gov't TaHST2 Genetic mapping haplotype analysis heat stress tolerance starch biosynthesis sucrose catabolism wheat
Description
Résumé:© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
Heat stress substantially reduces the yield potential of wheat (Triticum aestivum L.), one of the most widely cultivated staple crops, and greatly threatens global food security in the context of global warming. However, few studies have explored the heat stress tolerance (HST)-related genetic resources in wheat. Here, we identified and fine-mapped a wheat HST locus, TaHST2, which is indispensable for HST in both the vegetative and reproductive stages of the wheat life cycle. The studied pair of near isogenic lines (NILs) exhibited diverse morphologies under heat stress, based on which we mapped TaHST2 to a 485 kb interval on chromosome arm 4DS. Under heat stress, TaHST2 confers a superior conversion rate from soluble sugars to starch in wheat grains, resulting in faster grain filling and a higher yield potential. A further exploration of genetic resources indicated that TaHST2 underwent strong artificial selection during wheat domestication, suggesting it is an essential locus for basal HST in wheat. Our findings provide deeper insights into the genetic basis of wheat HST and might be useful for global efforts to breed heat-stress-tolerant cultivars
Description:Date Completed 04.11.2022
Date Revised 22.11.2022
published: Print
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/erac297