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Identification of S23 causing both interspecific hybrid male sterility and environment-conditioned male sterility in rice

文献类型： 外文期刊

作者： Fang, Chaowei 1 ; Li, Le 2 ; He, Runming 2 ; Wang, Daiqi 1 ; Wang, Man 1 ; Hu, Qian 1 ; Ma, Qianru 1 ; Qin, Kaiyi 1 ; Feng, 1 ;

作者机构： 1.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Guangdong, Peoples R China

2.South China Agr Univ, Coll Agr, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Guangdong, Peoples R China

3.Huazhi Rice Biotech Co Ltd, Changsha 410124, Hunan, Peoples R China

4.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangzhou 510642, Guangdong, Peoples R China

关键词： Oryza glumaepatula; Chromosome single-segment substitution lines (SSSLs); Interspecific hybrid sterility; Environment-conditioned male sterility; S23

期刊名称：RICE （ 影响因子：4.783； 五年影响因子：5.23 ）

ISSN： 1939-8425

年卷期： 2019 年 12 卷

页码：

收录情况： SCI

摘要： Background: Oryza glumaepatula represents an important resource of genetic diversity that can be used to improve rice production. However, hybrid sterility severely restricts gene flow between Oryza species, and hinders the utilization of distant heterosis in hybrid rice breeding. Results: In order to fully exploit the beneficial genes of O. glumaepatula and facilitate the conservation of these gene resources, a set of chromosome single-segment substitution lines (SSSLs) was developed using an indica variety HJX74 as the recurrent parent and an accession of O. glumaepatula as the donor parent. During the process of SSSLs development, S23, a locus conferring hybrid male sterility between O. sativa and O. glumaepatula, was identified and fine mapped to 11.54 kb and 7.08 kb genomic region in O. sativa and O. glumaepatula, respectively, encoding three and two candidate ORFs, respectively. qRT-PCR and sequence analysis excluded one common ORF as the candidate gene. In addition, hybrid male sterility caused by S23 was environment-sensitive, and could be observed only in natural short-day (NSD). Conclusion: Identification and candidate genes analysis of S23 in this study provides a valuable example to study the crosstalk between interspecific F-1 hybrid male sterility and environment-conditioned male sterility in rice, facilitates reserving and utilizing favorable genes or alleles of wild Oryza species, and allows for a more efficient exploitation of distant heterosis in hybrid rice breeding.

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