Genetic Dissection of the General Combining Ability of Yield-Related Traits in Maize

文献类型： 外文期刊

第一作者： Lu, Xin

作者： Lu, Xin;Yuan, Zhaohui;Zhang, Chaoshu;Wang, Zhenhua;Li, Xinhai;Lu, Xin;Zhou, Zhiqiang;Hao, Zhuanfang;Li, Mingshun;Zhang, Degui;Yong, Hongjun;Han, Jienan;Li, Xinhai;Weng, Jianfeng

作者机构：

关键词： maize; yield-related traits; NCII mating design; combining ability; QTL

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Maize yield components including row number, kernel number per row, kernel thickness, kernel width, kernel length, 100-kernel weight, and volume weight affect grain yield directly. Previous studies mainly focused on dissecting the genetic basis ofper seperformances for yield-related traits, but the genetic basis of general combining ability (GCA) for these traits is still unclear. In the present study, 328 RILs were crossed as males to two testers according to the NCII mating design, resulting in a hybrid panel composed of 656 hybrids. Both the hybrids and parental lines were evaluated in four environments in 2015 and 2016. Correlation analysis showed the performances of GCA effects were significantly correlated to theper seperformances of RILs for all yield-related traits (0.17 <= r <= 0.64,P> 0.01). Only 17 of 95 QTL could be detected for bothper seperformances of RILs and GCA effects for eight yield-related traits. The QTLqKN7-1andqHKW1-3, which could explain more than 10% of the variation in the GCA effects of KN and HKW, were also detected forper seperformances for the traits. The pleiotropic lociqRN3-1andqRN6, which together explained 14.92% of the observed variation in GCA effects for RN, were associated with the GCA effects of KW and HKW, but not withper seperformances for these traits. In contrast,Incw1, which was related to seed weight in maize, was mapped to the region surrounding MK2567 at theqHKW5-2locus, but no GCA effect was detected. The QTL identified in present study forper seperformances and corresponding GCA effects for yield-related traits might be useful for maize hybrid breeding.

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