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Resequencing of 1,143 indica rice accessions reveals important genetic variations and different heterosis patterns

文献类型： 外文期刊

作者： Lv, Qiming 1 ; Li, Weiguo 3 ; Sun, Zhizhong 1 ; Ouyang, Ning 1 ; Jing, Xin 4 ; He, Qiang 1 ; Wu, Jun 1 ; Zheng, Jiakui 5 ; Z 1 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China

2.Hunan Univ, Longping Branch, Grad Sch, Changsha 410125, Peoples R China

3.Huazhi Biotech Co Ltd, Changsha 410125, Peoples R China

4.Novogene Bioinformat Inst, Beijing 100089, Peoples R China

5.Sichuan Acad Agr Sci, Key Lab Southwest Rice Biol & Genet Breeding, Minist Agr, Rice & Sorghum Res Inst, Deyang 618000, Peoples R China

6.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350019, Peoples R China

7.China Natl Rice Res Inst, China Natl Ctr Rice Improvement, State Key Lab Rice Biol, Hangzhou 310006, Peoples R China

8.Wuhan Univ, Coll Life Sci, State Key Lab Hybrid Rice, Wuhan 430072, Peoples R China

9.Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China

10.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China

11.Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Coll Agron, Changsha 410128, Peoples R China

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2020 年 11 卷 1 期

页码：

收录情况： SCI

摘要： Obtaining genetic variation information from indica rice hybrid parents and identification of loci associated with heterosis are important for hybrid rice breeding. Here, we resequence 1,143 indica accessions mostly selected from the parents of superior hybrid rice cultivars of China, identify genetic variations, and perform kinship analysis. We find different hybrid rice crossing patterns between 3- and 2-line superior hybrid lines. By calculating frequencies of parental variation differences (FPVDs), a more direct approach for studying rice heterosis, we identify loci that are linked to heterosis, which include 98 in superior 3-line hybrids and 36 in superior 2-line hybrids. As a proof of concept, we find two accessions harboring a deletion in OsNramp5, a previously reported gene functioning in cadmium absorption, which can be used to mitigate rice grain cadmium levels through hybrid breeding. Resource of indica rice genetic variation reported in this study will be valuable to geneticists and breeders. Hybrid rice cultivars are widely planted around the world. Here, the authors resequence 1,143 indica accessions, focusing on the parents of superior hybrid rice lines in China, and reveal genetic loci that are associated with heterosis via measuring frequency of parental variation difference (FPVD).

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