Natural variation of STKc_GSK3 kinase TaSG-D1 contributes to heat stress tolerance in Indian dwarf wheat

• 全文链接

STKc_GSK3激酶TaSG-D1的自然变异对印度矮秆小麦耐热性的影响

关键词：

来源：

SPRINGER NATURE

全文链接：

//agri.nais.net.cn/topic/downloadFile/4478947f-a424-418c-9223-898bd56fd2b6

来源地址：

//agri.nais.net.cn/topic/downloadFile/4478947f-a424-418c-9223-898bd56fd2b6

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：

2024-03-07

摘要：

Heat stress threatens global wheat (Triticum aestivum) production, causing dramatic yield losses worldwide. Identifying heat tolerance genes and comprehending molecular mechanisms are essential. Here, we identify a heat tolerance gene, TaSG-D1E286K, in Indian dwarf wheat (Triticum sphaerococcum), which encodes an STKc_GSK3 kinase. TaSG-D1E286K improves heat tolerance compared to TaSG-D1 by enhancing phosphorylation and stability of downstream target TaPIF4 under heat stress condition. Additionally, we reveal evolutionary footprints of TaPIF4 during wheat selective breeding in China, that is, InDels predominantly occur in the TaPIF4 promoter of Chinese modern wheat cultivars and result in decreased expression level of TaPIF4 in response to heat stress. These sequence variations with negative effect on heat tolerance are mainly introduced from European germplasm. Our study provides insight into heat stress response mechanisms and proposes a potential strategy to improve wheat heat tolerance in future.