Construction of a genetic linkage map and QTL mapping of the agronomic traits in Foxtail millet (Setaria italica)
文献类型： 外文期刊
第一作者： Gao, Lulu
作者： Gao, Lulu;Zhu, Qianxue;Li, Huan;Wang, Shiyuan;Fan, Jiahui;Wang, Tianguo;Yang, Lejie;Zhao, Yuqin;Ma, Yixuan;Chen, Lu;Li, Xiaorui;Dong, Shuqi;Chu, Xiaoqian;Yuan, Xiangyang;Wang, Jiagang;Yang, Guanghui;Diao, Xianmin
作者机构：
关键词： Foxtail Millet; Genetic linkage map; QTL mapping; Agronomic traits; Candidate gene
期刊名称：BMC GENOMICS （ 影响因子：3.7； 五年影响因子：4.2 ）
ISSN： 1471-2164
年卷期： 2025 年 26 卷 1 期
页码：
收录情况： SCI
摘要： Foxtail millet (Setaria italica) is one of the most ancient cultivated cereal crops and is ideal for the functional genomics of the Panicoideae crops. In the present study, we generated an F2 population consisting of 300 individuals by crossing an elite foxtail millet variety Jingu28 with a backbone line Ai88, and constructed a genetic linkage map with 213 published SSR markers and two InDel markers. Quantitative trait locus (QTL) mapping identified 46 QTL for 12 agronomic traits, including 13 major effect QTL. Meanwhile, 40 QTL controlling different traits formed 13 co-located QTL clusters. Moreover, one putative candidate gene Seita.9G020100 for qHD9-1 with conserved CCT motif and a gibberellin biosynthesis related GA20 oxidase gene Seita.5G404900 for qPH5-1 were identified based on homologous gene comparison. The 277 bp insertion/deletion on the promoter of Seita.9G020100 and the one-base (G) insertion/deletion in the third exon of Seita.5G404900 might be candidate functional sites. Furthermore, two markers (Ghd7InDel and GA20oxSTARP-1) were developed based on these two variation sites, respectively. These results will help to elucidate the genetic basis of important agronomic traits in foxtail millet and be useful for marker-assisted selection of varieties with ideal plant architecture and high yield potential.
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