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Genetic Analysis in Maize Foundation Parents with Mapping Population and Testcross Population: Ye478 Carried More Favorable Alleles and Using QTL Information Could Improve Foundation Parents

文献类型： 外文期刊

作者： Liu, Yinghong 1 ; Hou, Xianbin 1 ; Xiao, Qianlin 1 ; Yi, Qiang 1 ; Bian, Shaowei 1 ; Hu, Yufeng 1 ; Liu, Hanmei 2 ; Zhang 1 ;

作者机构： 1.Sichuan Agr Univ, Coll Agron, Chengdu, Peoples R China

2.Sichuan Agr Univ, Coll Life Sci, Yaan, Peoples R China

3.Guangxi Univ, Coll Agron, Nanning, Peoples R China

4.Guangxi Acad Agr Sci, Maize Res Inst, Nanning, Peoples R China

5.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China

关键词： maize;foundation parent;quantitative trait loci;general combining ability;improvement

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： 2016 年 7 卷

页码：

收录情况： SCI

摘要： The development of maize foundation parents is an important part of genetics and breeding research, and applying new genetic information to produce foundation parents has been challenging. In this study, we focused on quantitative trait loci (QTLs) and general combining ability (GCA) of Ye478, a widely used foundation parent in China. We developed three sets of populations for QTL mapping and to analyze the GCA for some agronomic traits. The assessment of 15 traits resulted in the detection of 251 QTLs in six tested environments, with 119 QTLs identified through a joint analysis across all environments. Further, analyses revealed that most favorable alleles for plant type related traits were from Ye478, and more than half of the favorable alleles for yield-related traits were from R08, another foundation parent used in southwestern China, suggesting that different types of foundation parents carried different favorable alleles. We observed that the GCA for most traits (e.g., plant height and 100-kernel weight) was maintained in the inbred lines descended from the foundation parents. Additionally, the continuous improvement in the GCA of the descendants of the foundation parents was consistent with the main trend in maize breeding programs. We identified three significant genomic regions that were highly conserved in three Ye478 descendants, including the stable QTL for plant height. The GCA for the traits in the F-7 generation revealed that the QTLs for the given traits per se were affected by additive effects in the same way in different populations.

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