A new gene controlling hybrid sterility in rice (Oryza sativa L.)

文献类型: 外文期刊

第一作者: Wan, Jianmin

作者: Wan, Jianmin;Chen, Mingjiang;Zhao, Zhigang;Jiang, Ling

作者机构:

关键词: Oryza sativa;Inter-subspecific hybrid;Embryo-sac sterility

期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )

ISSN: 0014-2336

年卷期: 2012 年 184 卷 1 期

页码:

收录情况: SCI

摘要: Hybrids between rice subspecies indica and japonica display strong heterosis. However, semi-sterility of inter-subspecific hybrids between indica and japonica varieties is a major obstacle for application of hybrid vigor in rice production. Semi-sterility was previously ascribed to allelic interaction at a number of different loci, whereas, wide-compatibility varieties can overcome hybrid sterility. Variety Nekken 2, which is a source of wide compatibility genes, showed sterility when crossed to the Korean variety Yeong Pung. Genetic and cytological analyses revealed that the semi-sterility was caused by partial abortion of the embryo sac. Genome-wide analysis of the backcross population, Nekken 2/Yeong Pung//Nekken 2 identified two independent loci for hybrid sterility on chromosomes 1 and 12, explaining 18.99 and 18.03% of the phenotypic variance, respectively. To confirm this result, another population of the same backcross containing 216 individuals was tested at a different site in a different year. The locus on chromosome 12 was detected again. Based on the study, the stable QTL on chromosome 12 appeared to be different from previously reported genes for this trait, and was designated as S35(t).

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