Genetics of a diverse soft winter wheat population for pre-harvest sprouting, agronomic, and flour quality traits

• 全文链接

不同软质冬小麦群体收获前发芽、农艺和面粉品质性状的遗传

关键词：

来源：

Fronteirs

全文链接：

//agri.nais.net.cn/topic/downloadFile/d1c14533-3254-4a3d-9b53-e1e3e477781b

来源地址：

https://www.frontiersin.org/articles/10.3389/fpls.2023.1137808/full

资源所属：

小麦遗传育种专题

类型：

学术文献

语种：

英语

原文发布日期：

2023-06-06

摘要：

Soft winter wheat has been adapted to the north-central, north-western, and south-central United States over hundreds of years for optimal yield, height, heading date, and pathogen and pest resistance. Environmental factors like weather affect abiotic traits such as pre-harvest sprouting resistance. However, pre-harvest sprouting has rarely been a target for breeding. Due to changing weather patterns from climate change, pre-harvest sprouting resistance is needed to prevent significant crop losses not only in the United States, but world-wide. Twenty-two traits including age of breeding line as well as agronomic, flour quality, and pre-harvest sprouting traits were studied in a population of 188 lines representing genetic diversity over 200 years of soft winter wheat breeding. Some traits were correlated to one another by principal components analysis and Pearson’s correlations. A genome-wide association study using 1978 markers uncovered a total of 102 regions encompassing 226 quantitative trait nucleotides. Twenty-six regions overlapped multiple traits with common significant markers. Many of these traits were also found to be correlated by Pearson’s correlation and principal components analyses. Most pre-harvest sprouting regions were not co-located with agronomic traits and thus useful for crop improvement against climate change without affecting crop performance. Six different genome-wide association statistical models (GLM, MLM, MLMM, FarmCPU, BLINK, and SUPER) were utilized to search for reasonable models to analyze soft winter wheat populations with increased markers and/or breeding lines going forward. Some flower quality and agronomic traits seem to have been selected over time, but not pre-harvest sprouting. It appears possible to select for pre-harvest sprouting resistance without impacting flour quality or the agronomic value of soft winter wheat.