粳稻品种4502与广亲和品种间杂种F1不育性的遗传分析

利用９个籼、粳稻品种,７个广亲和品种,配制单交Ｆ１、回交及三交组合,研究了粳稻品种４５０２与广亲和品种间Ｆ１不育性的遗传。根据与品种４５０２杂交Ｆ１的亲和性,可将参试的广亲和品种分为两组,Ｉ组是４５０２亲和的品种,如Ｄｕｌａｒ和０２４２８;Ⅱ组是与４５０２不亲和的品种,如热研１号、Ｍｏｒｏｂｅｒｅｋａｎ和ＣＰＳＬＯ１７。回交和三交组合的育性分离表明,４５０２和Ⅱ组广亲和品种间杂种Ｆ１花粉不育性受单

Genetic Studies on F_1 Sterilities between 4502 (Oryza sativa L. subsp. japonica) and Several Wide Compatibility Rice Varieties (WCVs)

9 varieties of japonica and indica rice, and 7 WCVs were used and F1 hybrids,backcrosses and three-varietal crosses (TVC) were made in order to study the inheritance ofsterility in F1s between japonica rice 4502 and several WCVs. On the basis of the compatibilitywith 4502, the WCVs tested may be classified into two groups, i. e. the group I WCV wascompatible with 4502 such as Dular and 02428; the group II WCV was incompatible with 4502such as Nekken 1, Moroberekan and CPSLO 17. The segregation pattern for the sterility in several backcrosses and TVC could be explained by a single locus sporogametophytic allelic interaction model. The locus for the F1s pollen sterility between 4502 and the group II WCV was designated as S-D(t) tentatively. Variety Dular was found to have neutral allele Sn-D(t) at the locus.