Heterosis and combining ability of seven maize germplasm populations

文献类型： 外文期刊

第一作者： Zhang, Xiaocong

作者： Zhang, Xiaocong;Zhang, Chaoshu;Zhang, Lin;Wang, Zhenhua;Zhang, Xiaocong;Yong, Hongjun;Zhou, Zhiqiang;Lu, Ming;Zhang, Degui;Weng, Jianfeng;Hao, Zhuanfang;Zhang, Shihuang;Li, Xinhai;Lu, Ming;Sun, Qi

作者机构：

关键词： Maize population;General combining ability;Specific combining ability;Heterosis

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

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年卷期：

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收录情况： SCI

摘要： Understanding the combining ability and heterosis of available germplasm is a prerequisite for successful maize improvement and breeding. The objectives of this study were to analyze the combining ability and heterosis of seven representative maize germplasm populations, and further, to evaluate their potential utility in germplasm improvement. A total of 21 crosses were made among these seven populations in a complete diallel without reciprocals. The parental populations and 21 crosses were evaluated for days to silking (DS), ear height (EH), and grain yield (GY) in the Northeast and Yellow and Huai River maize growing areas in China in 2012. Csyn5, Csyn7, Cpop.11, and Cpop.12 had desirable general combining ability (GCA) effects for DS and EH in both the Northeast China mega-environment (NCM) and the Yellow and Huai River Regions of China mega-environment (YHCM). Cpop.11 possessed a favorable GCA effect for GY in the NCM, as did Csyn5, Cpop. 17, and Cpop. 18 in the YHCM. Csyn6 and Csyn7 exhibited tremendous yield-enhancing potential in both mega-environments. Additionally, six combinations including Csyn7 x Csyn6, Csyn5 x Csyn6, Cpop.11 x Cpop.18, Cpop.12 x Cpop.17, Csyn7 x Cpop. 17, and Csyn5 x Csyn7 exhibited better specific combining ability effects for GY, yield performance, and mid-parent heterosis in the appropriate mega-environment. These results indicated that the seven populations would be very useful for the improvement of related agronomic traits, and the six candidate combinations possessed great potential for further improvement and utilization.

分类号： S3

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