Unraveling the genetic basis of maize ear diameter in a multi-parent RIL population derived from tropical and temperate germplasms

文献类型： 外文期刊

第一作者： Yang, Xiaoping

作者： Yang, Xiaoping;Yang, Xiaoping;Shaw, Ranjan K.;Jiang, Fuyan;Wang, Guohong;Fan, Xingming

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：4.2； 五年影响因子：4.9 ）

ISSN： 0040-5752

年卷期： 2025 年 138 卷 8 期

页码：

收录情况： SCI

摘要： Key messageBased on WGS data, GWAS and QTL mapping jointly reveal the genetic mechanisms underlying maize ear diameter and identify candidate genes associated with this trait.AbstractMaize ear diameter is a crucial yield-related trait, yet its underlying genetic mechanisms remain largely undefined. To elucidate its genetic basis, a multi-parent population was developed from tropical and temperate maize germplasms. Employing a combined genome-wide association study and quantitative trait locus (QTL) mapping approach, five novel candidate genes (Zm00001eb032370, Zm00001eb050010, Zm00001eb303690, Zm00001eb023590, and Zm00001eb035700) and three key QTLs (qE1-1, qE1-5, and qE1-7) significantly associated with maize ear diameter were identified. Comprehensive analysis revealed that these candidate genes are involved in essential biological processes, including growth regulation, signal transduction, and stress responses, and likely modulate ear diameter through mechanisms such as hormone balance, cell division, and expansion. This study provides critical novel candidate genes for improving maize ear diameter and offers valuable insights into the molecular mechanisms regulating plant growth and development. Our findings not only enhance the understanding of maize developmental biology but also lay a theoretical foundation and offer new strategies for the genetic improvement of maize yield traits.

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