文献类型： 外文期刊

作者： Liu, KD ¹ ; Wang, J ² ; Li, HB ² ; Xu, CG ² ; Liu, AM ² ; Li, XH ² ; Zhang, QF ² ;

作者机构： 1.HUAZHONG AGR UNIV,NATL KEY LAB CROP GENET IMPROVEMENT,WUHAN 430070,PEOPLES R CHINA

2.HUAZHONG AGR UNIV,NATL KEY LAB CROP GENET IMPROVEMENT,WUHAN 430070,PEOPLES R CHINA; JIANGSU ACAD AGR SCI,NANJING 210014,PEOPLES R CHINA

关键词： Oryza sativa L;indica and japonica;hybrid sterility;mapping;rice breeding

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 1997 年 95 卷 5-6 期

页码：

收录情况： SCI

摘要： The discovery of wide-compatibility varieties (WCVs) that are able to produce normal fertility hybrids when crossed both to indica and japonica rice has enabled the fertility barrier between indica and japonica subspecies to be broken and provided the possibility of developing inter-subspecific hybrids in rice breeding programs. However, a considerable variation in the fertility level of hybrids from the same WCV crossed to different varieties has often been observed. One hypothesis for this variable fertility is that additional genes are involved in hybrid fertility besides the wide-compatibility gene (WCG). To assess such a possibility, we performed a genome-wide analysis by assaying a large population from a three-way cross 'O2428'/'Nanjing 11'//'Balilla' using a total of 171 RFLP probes detecting 191 polymorphic loci distributed throughout the entire rice linkage map. Our analysis recovered 3 loci conferring significant effects on hybrid fertility. The major locus on chromosome 6 coincided in chromosomal location with the previously identified S-5 locus, and the 2 minor loci that mapped to chromosomes 2 and 12, respectively, were apparently distinct from all previously reported hybrid sterility genes. Interaction between the indica and japonica alleles at each of the loci caused a reduction in hybrid fertility. The joint effect of the 2 minor loci could lead to partial sterility even in the presence of the WCG. The location of the S-5 locus on the molecular marker linkage map was determined to be approximately 1.0 cM from the RFLP locus R2349. This tight linkage will be useful for marker-aided transfer of the WCG in hybrid rice breeding and for map-based cloning.