数字农科院2.0

Dissection and Fine-Mapping of Two QTL Controlling Grain Size Linked in a 515.6-kb Region on Chromosome 10 of Rice

文献类型： 外文期刊

作者： Yi Shen;Derun Huang;Zhenhua Zhang;Yeyang Fan;Zhonghua Sheng;Jieyun Zhuang;Bo Shen;Yujun Zhu

作者机构：

关键词： closely linked;grain size;grain weight;minor effect;quantitative trait locus;rice

期刊名称： Plants

ISSN： 2223-7747

年卷期： 2024 年 13 卷 15 期

页码：

收录情况： SCIE（2024版）

摘要： Grain size is a primary determinant of grain weight, which is one of the three essential components of rice grain yield. Mining the genes that control grain size plays an important role in analyzing the regulation mechanism of grain size and improving grain appearance quality. In this study, two closely linked quantitative trait loci (QTL) controlling grain size, were dissected and fine-mapped in a 515.6-kb region on the long arm of chromosome 10 by using six near isogenic line populations. One of them, qGS10.2, which controlled 1000 grain weight (TGW) and grain width (GW), was delimited into a 68.1-kb region containing 14 annotated genes. The Teqing allele increased TGW and GW by 0.17 g and 0.011 mm with the R2 of 12.7% and 11.8%, respectively. The other one, qGL10.2, which controlled grain length (GL), was delimited into a 137.3-kb region containing 22 annotated genes. The IRBB52 allele increased GL by 0.018 mm with the R2 of 6.8%. Identification of these two QTL provides candidate regions for cloning of grain size genes.

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