生物
花序梗(解剖学)
基因
航向(导航)
转录组
栽培
等位基因
植物茎
单倍型
遗传学
植物
基因表达
大地测量学
地理
作者
Mingxue Fu,Shaoshuai Liu,Yuqing Che,Dada Cui,Zhongyin Deng,Li Yang,Xinyu Zou,Xingchen Kong,Guoliang Chen,Min Zhang,Yifan Liu,Xiang Wang,Wei Liu,Danmei Liu,Shuaifeng Geng,Aili Li,Long Mao
标识
DOI:10.1016/j.jgg.2024.05.011
摘要
Plant height and heading date are important agronomic traits in wheat (Triticum aestivum L.) that affect final grain yield. In wheat, knowledge of pseudo-response regulator (PRR) genes on agronomic traits is limited. Here, we identify a wheat TaPRR95 gene by genome-wide association study (GWAS) to be associated with plant height. Triple allele mutant plants produced by CRISPR/Cas9 show increased plant height, particularly at the peduncle, with an earlier heading date. The longer peduncle is mainly caused by the increased cell elongation at its upper section, whilst the early heading date is accompanied with elevated expression of flowering genes, such as TaFT and TaCO1. A peduncle-specific transcriptome analysis reveals up-regulated photosynthesis genes and down-regulated IAA/Aux genes for auxin signaling in prr95aabbdd plants that may act as a regulatory mechanism to promote robust plant growth. A haplotype analysis identifies a TaPRR95-B haplotype (Hap2) to be closely associated with reduced plant height and increased thousand-grain weight. Moreover, the Hap2 frequency is higher in cultivars than that in landraces, suggesting the artificial selection on the allele during wheat breeding. These findings suggest that TaPRR95 is a new regulator for plant height and heading date, thereby providing an important target for wheat yield improvement.
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