Introgression of chromosome 5P from Agropyron cristatum enhances grain weight in a wheat background

文献类型： 外文期刊

第一作者： Han, Haiming

作者： Han, Haiming;Yang, Junli;Qi, Kai;Zhu, Haoyu;Wu, Panqiang;Zhou, Shenghui;Zhang, Jinpeng;Guo, Baojin;Liu, Weihua;Guo, Xiaomin;Lu, Yuqing;Yang, Xinming;Li, Xiuquan;Li, Lihui;Han, Haiming;Yang, Junli;Qi, Kai;Zhu, Haoyu;Wu, Panqiang;Zhou, Shenghui;Zhang, Jinpeng;Guo, Baojin;Liu, Weihua;Guo, Xiaomin;Lu, Yuqing;Yang, Xinming;Li, Xiuquan;Li, Lihui;Yang, Junli;Yang, Junli

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：4.4； 五年影响因子：5.0 ）

ISSN： 0040-5752

年卷期： 2024 年 137 卷 7 期

页码：

收录情况： SCI

摘要： Thousand-grain weight is an important trait in wheat breeding, with a narrow genetic basis being the main factor limiting improvement. Agropyron cristatum, a wild relative of wheat, harbors many desirable genes for wheat improvement. Here, we found that the introduction of the 5P chromosome from A. cristatum into wheat significantly increased the thousand-grain weight by 2.55-7.10 g, and grain length was the main contributor to grain weight. An increase in grain weight was demonstrated in two commercial wheat varieties, indicating that the grain weight locus was not affected by the wheat background. To identify the chromosome segment harboring the grain weight locus, three A. cristatum 5P deletion lines, two wheat-A. cristatum 5P translocation lines and genetic populations of these lines were used to evaluate agronomic traits. We found that the translocation lines harboring the long arm of A. cristatum chromosome 5P (5PL) exhibited high grain weight and grain length, and the genetic locus associated with increased grain weight was mapped to 5PL (bin 7-12). An increase in grain weight did not adversely affect other agronomic traits in translocation line 5PT2, which is a valuable germplasm resource. Overall, we identified a grain weight locus from chromosome 5PL and provided valuable germplasm for improving wheat grain weight.

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