Zhu X D, Wang J L, Qian Q, Zhang X H, Zeng D L, Zhu L H, Min S K, Xiong Z M
Key Lab. for Rice Biology, Ministry of Agriculture, China National Rice Research Institute, Hangzhou.
Yi Chuan Xue Bao. 1998;25(3):245-51.
Japonica line 02428, possessing wide compatibility gene S-5n, showed semi-sterility as crossed with indica variety IR24. Genetic analysis was conducted on the spikelet fertility in segregation generations from the crosses of 02428 with IR24, Pecos and Akihikara. The results indicated that the sterility in hybrids between 02428 and IR24 was controlled by a single non-allelic to S-5 gene and its inheritance fitted to one-locus sporo-gametophytic interaction model. Pecos, an American variety, has a neutral allele. The new sterility locus was preliminarily located near G24 marker on chromosome 11 detected by RFLP. The non-allelic S-locus in the study is named tentatively S-p(t). It was found that the sterility caused by the cross of Akihikara and IR24 was controlled by two S-loci, S-5 and S-p(t), and its genetical effect was additive.
粳稻品系02428具有广亲和基因S-5n，与籼稻品种IR24杂交时表现为半不育。对02428与IR24、Pecos和秋光杂交的分离世代的小穗育性进行了遗传分析。结果表明，02428与IR24杂交后代的不育性受一个与S-5基因非等位的单一基因控制，其遗传符合一位点孢子-配子体互作模型。美国品种Pecos具有一个中性等位基因。通过RFLP检测，新的不育位点初步定位在第11染色体上的G24标记附近。本研究中的非等位S位点暂命名为S-p(t)。发现秋光与IR24杂交引起的不育受两个S位点S-5和S-p(t)控制，其遗传效应为累加效应。
