数字农科院2.0

Wheat TaPKL genes regulate pre-harvest sprouting and yield-related traits

文献类型: 外文期刊

作者: Wanqing Bai;Ziyi Yang;Xuchang Yu;Shuxian Huang;Yufan Wang;Yexing Jing;Yunwei Zhang;Jiaqiang Sun

作者机构:

关键词: TaPKL; wheat; pre-harvest sprouting

期刊名称: Journal of Genetics and Genomics

ISSN: 1873-5533

年卷期: 2025 年 52 卷 9 期

页码:

收录情况: SCIE(2025版) ; ; CSCD(2025-2026年度) ; ; 科技核心(2024版)

摘要: 为探究染色质重塑因子PKL是否参与调控小麦重要农艺性状,该研究构建了TaPKL-RNAi转基因小麦株系。RT-qPCR分析显示,转基因植株中同源基因TaPKL-7A/7B/7D和TaPKL-4A/4B/4D的表达水平均显著降低。TaPKL-RNAi转基因小麦表现出明显的抗穗发芽表型。进一步分析发现,ABA信号通路关键基因TaABI3和TaABI5表达水平以及内源ABA含量在转基因植株中均显著升高,提示TaPKL可能通过ABA途径调控小麦穗发芽。此外,利用基因编辑技术创制了TaPKL-7A/7B/7D的突变体材料TaPKL-bbdd和TaPKL-aabbdd,这些突变体表现出株高降低和穗长增加的优异农艺性状。单倍型分析鉴定到TaPKL-7A基因的一个优异单倍型7A_Hap_2,携带该单倍型的小麦种质表现出穗粒数增加的表型,其尚未在我国小麦育种中被应用,因此具有重要的育种利用价值。

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