Identification and Genetic Analysis of Collinearity Loci for Interspecific Hybrid Sterility in Genus Oryza

文献类型： 外文期刊

第一作者： Yang, Ying

作者： Yang, Ying;Pu, Qiuhong;Lv, Yonggang;Li, Jing;Zhou, Jiawu;Deng, Xianneng;Song, Xuanchen;Zhang, Yu;Tao, Dayun

作者机构：

关键词： Rice; Interspecific hybrid sterility; Segregation distortion; Collinearity; Orthologous

期刊名称：RICE （ 影响因子：5.0； 五年影响因子：5.5 ）

ISSN： 1939-8425

年卷期： 2025 年 18 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundHybrid sterility is a common phenomenon in hybrids between the Asian cultivated rice (Oryza sativa L.) and its relatives with AA genome, which limits the utilization of interspecific heterosis and favorable gene introgression. Numerous loci for hybrid sterility have been identified between O. sativa and its relatives. However, it remains elusive whether hybrid sterility between different species is controlled by a set of conserved loci, and whether there are variations in the genetic mode of these loci.ResultsIn this study, six novel hybrid sterility loci for pollen sterility were identified from different cross combinations between O. sativa and its three wild relatives. S59 caused hybrid pollen sterility in hybrids between O. sativa and O. rufipogon. S60 and S61 controlled the hybrid pollen sterility between O. sativa and O. glumaepatula. S62, S63 and S64 governed the hybrid pollen sterility between O. sativa and O. barthii. Genetic and linkage analysis showed that S59, S60, and S62 were located in near the same region on the short arm of chromosome 5. S61 and S63 were mapped near RM27460 on the short arm of chromosome 12. S64 was restricted into the 60.27 kb region between RM4853 and RM3372 on the short arm of chromosome 3. The genetic behavior of six novel hybrid sterility loci follows one-locus allelic interaction model, the male gametes carrying the alleles of O. sativa in the heterozygotes were selectively aborted except for S62.ConclusionsThe findings from this research would provide a better understanding for the genetic nature of interspecific hybrid sterility in rice.

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