数字农科院2.0

QTL Analysis Reveals Conserved and Differential Genetic Regulation of Maize Lateral Angles above the Ear

文献类型： 外文期刊

作者： Yanbin Zhu;Bo Song;Yanling Guo;王宝宝;Changcheng Xu;Hongyu Zhu;Lizhu E;Jinsheng Lai;Weibin Song;Haiming Zhao

作者机构：

关键词： leaf angle (LA);maize;quantitative trait locus (QTL);tassel branch angle (TBA)

期刊名称： Plants

ISSN： 2223-7747

年卷期： 2023 年 12 卷 3 期

页码：

收录情况： SCIE（2023版）

摘要： Improving the density tolerance and planting density has great importance for increasing maize production. The key to promoting high density planting is breeding maize with a compact canopy architecture, which is mainly influenced by the angles of the leaves and tassel branches above the ear. It is still unclear whether the leaf angles of different stem nodes and tassel branches are controlled by similar genetic regulatory mechanisms, which limits the ability to breed for density-tolerant maize. Here, we developed a population with 571 double haploid lines derived from inbred lines, PHBA6 and Chang7-2, showing significant differences in canopy architecture. Phenotypic and QTL analyses revealed that the genetic regulation mechanism was largely similar for closely adjacent leaves above the ears. In contrast, the regulation mechanisms specifying the angles of distant leaves and the angles of leaves vs. tassel branches are largely different. The liguless1 gene was identified as a candidate gene for QTLs co-regulating the angles of different leaves and the tassel branch, consistent with its known roles in regulating plant architecture. Our findings can be used to develop strategies for the improvement of leaf and tassel architecture through the introduction of trait-specific or pleiotropic genes, thus benefiting the breeding of maize with increased density tolerance in the future.

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