Response to heat stress and glutenins allelic variation effects on quality traits in durum wheat

• 全文链接

热胁迫响应及谷蛋白等位基因变异对硬粒小麦品质性状的影响

关键词：

来源：

Wiley Online Library

全文链接：

//agri.nais.net.cn/topic/downloadFile/9ac8c9fc-8fa8-4d2b-8088-b4a205f6888d

来源地址：

https://onlinelibrary.wiley.com/doi/full/10.1111/jac.12686

资源所属：

小麦遗传育种专题

类型：

前沿资讯

语种：

英语

原文发布日期：

2024-01-16

摘要：

In the context of climate change, high temperature is one of the main abiotic stresses hampering durum wheat production. Through the characterization of an international panel of 271 genotypes, this study investigates the effects of heat stress on quality traits and identifies which glutenins (Glu-1, Glu-2 and Glu-3 loci) alleles are the most important to obtain high gluten strength under optimal and high temperature conditions. In parallel with the wide variability observed in the panel, the genotype and environmental effects, including their interaction, showed highly significant effect on test weight, thousand kernel weight, grain protein content (GPC), sodium dodecyl sulphate sedimentation volume (SDSS) and SDSS index. Only one genotype maintained test weight and thousand kernel weight under heat-stress conditions whereas for GPC, SDSS and SDSS index, most genotypes increased values. All Glu loci had significant effects on grain protein content (with the exception of Glu-B2), SDSS and SDSS Index. None of the Glu loci interacted with the environment or years under study. Among the identified alleles, Glu-A1b, Glu-B1an, Glu-B1a, Glu-B2a, Glu-A3a.x, Glu-A3d, Glu-B3a and Glu-B3ax (including the LMW-2 pattern) were associated with high values for SDSS and SDSS Index. Genotypes identified in this study, with good performances under optimal and high temperature growing conditions, could be useful for breeding programs. The non-interaction of the Glu loci with the environment facilitates the introgression of desired alleles regardless of high growing temperatures.