文献类型： 外文期刊

作者： Li, Chunhui ¹ ; Guan, Honghui ¹ ; Jing, Xin ² ; Li, Yaoyao ³ ; Wang, Baobao ⁴ ; Li, Yongxiang ¹ ; Liu, Xuyang ¹ ; Zhang, Dengfeng ¹ ; Liu, Cheng ⁵ ; Xie, Xiaoqing ⁵ ; Zhao, Haiyan ⁶ ; Wang, Yanbo ⁶ ; Liu, Jingbao ⁷ ; Zhang, Panpan ⁷ ; Hu, Guanghui ⁸ ; Li, Guoliang ⁸ ; Li, Suiyan ⁹ ; Sun, Dequan ⁹ ; Wang, Xiaoming ¹ ; Shi, Yunsu ¹ ; Song, Yanchun ¹ ; Jiao, Chengzhi ² ; Ross-Ibarra, Jeffrey ¹⁰ ; Li, Yu ¹ ; Wang, Tianyu ¹ ; Wang, Haiyang ³ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China

2.Novogene Bioinformat Inst, Beijing, Peoples R China

3.South China Agr Univ, Guangdong Lab Lingnan Modern Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou, Peoples R China

4.Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing, Peoples R China

5.Xinjiang Acad Agr Sci, Inst Food Crops, Urumqi, Peoples R China

6.Liaoning Acad Agr Sci, Inst Maize Res, Shenyang, Peoples R China

7.Henan Acad Agr Sci, Inst Cereal Crops, Zhengzhou, Peoples R China

8.Heilongjiang Acad Agr Sci, Inst Maize Res, Harbin, Peoples R China

9.Heilongjiang Acad Agr Sci, Inst Forage & Grassland Sci, Harbin, Peoples R China

10.Univ Calif Davis, Dept Evolut & Ecol, Davis, CA 95616 USA

11.Univ Calif Davis, Ctr Populat Biol, Davis, CA 95616 USA

12.Univ Calif Davis, Genome Ctr, Davis, CA 95616 USA

期刊名称：NATURE PLANTS （ 影响因子：17.352； 五年影响因子：19.328 ）

ISSN： 2055-026X

年卷期： 2022 年 8 卷 7 期

页码：

收录情况： SCI

摘要： This study reports the genomic changes underlying the convergent and divergent agronomic improvement of the female and male heterotic groups during modern hybrid maize breeding, laying a foundation for the dissection and utilization of maize heterosis. Single-cross maize hybrids display superior heterosis and are produced from crossing two parental inbred lines belonging to genetically different heterotic groups. Here we assembled 1,604 historically utilized maize inbred lines belonging to various female heterotic groups (FHGs) and male heterotic groups (MHGs), and conducted phenotyping and genomic sequencing analyses. We found that the FHGs and MHGs have undergone both convergent and divergent changes for different sets of agronomic traits. Using genome-wide selection scans and association analyses, we identified a large number of candidate genes that contributed to the improvement of agronomic traits of the FHGs and MHGs. Moreover, we observed increased genetic differentiation between the FHGs and MHGs across the breeding eras, and we found a positive correlation between increasing heterozygosity levels in the differentiated genes and heterosis in hybrids. Furthermore, we validated the function of two selected genes and a differentiated gene. This study provides insights into the genomic basis of modern hybrid maize breeding.