Development of Wide-Compatible Indica Lines by Pyramiding Multiple Neutral Alleles of Indica-Japonica Hybrid Sterility Loci
文献类型： 外文期刊
作者： Guo, Jie 1 ; Li, Yun 1 ; Xiong, Liang 1 ; Yan, Tingxian 1 ; Zou, Jinsong 1 ; Dai, Ziju 1 ; Tang, Guang 1 ; Sun, Kangli 1 ; Luan, Xin 1 ; Yang, Weifeng 1 ; Tan, Quanya 1 ; Zhu, Haitao 1 ; Zeng, Ruizhen 1 ; Wang, Shaokui 1 ; Zhang, Guiquan 1 ;
作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Plant Mol Breeding, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangzhou, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou, Peoples R China
关键词： hybrid rice; heterosis; hybrid sterility; neutral allele; breeding by design
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Since the development of indica hybrid rice in the 1970s, great success has been achieved in hybrid rice production in China and around the world. The utilization of inter-subspecific indica-japonica hybrid rice has always been considered due to its stronger heterosis characteristics. However, indica-japonica hybrids face a serious problem of sterility, which hinders the exploitation of their heterosis. In the past decades, the genetic basis of indica-japonica hybrid sterility has been well studied. It was found that in sterile indica-japonica hybrids, female sterility was mainly controlled by the S5 locus and male sterility by the Sa, Sb, Sc, Sd, and Se loci. In this study, we developed wide-compatible indica lines (WCILs) by pyramiding multiple neutral (n) alleles of the hybrid sterility loci. First, we identified S-n alleles of the loci in single-segment substitution lines (SSSLs) in the genetic background of indica Huajingxian 74 (HJX74). Then, the S-n alleles of S5, Sb, Sc, Sd, and Se loci in SSSLs were pyramided in the HJX74 genetic background. The WCILs carrying S-n alleles at the S5, Sb, Sc, Sd, and Se loci showed wide compatibility with indica and japonica rice varieties. Therefore, the WCILs will be used to develop inter-subspecific indica-japonica hybrid rice with normal fertility.
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