几个美国光壳稻的亲和性分析

将５个籼粳两种类型的美国光壳稻ＲＡ７３，ＫａｔｙＭａｒｓ，Ｌａｇｒｕｅ，Ｎｅｗｎｏｎｎｅｔ和中国籼稻特青配成一组完全双列杂交，进行Ｆ１代结实率配合力分析，结果表明：籼型光壳稻ＲＡ７３的结实率一般配合力最高，与粳型光壳稻Ｍａｒｓ杂交特殊配合力也最高，结实率达８７．７％，有较好的亲和性，比前人报道的广亲和品种Ｎｅｗｂｏｎｎｅｔ与粳稻Ｍａｒｓ杂交的结实率（５６．５％）极显著地提高，ＲＡ７３可用于籼粳杂交

Analysis for Compatibility in Some Smooth Rice Varieties of USA

The study was conducted to analyze the Compatibility through the GCA(general Combining Ability) effectsand the SCA(special combining ability) effects of the SFP(spike fertility percentage) in F1 hybrids of a complete diallel crosses among 6 varieties including 4 smooth indica rice RA73, Katy, LaGrue, Newnonnet, one smoothJaponica rice Mars of USA and one down Indica rice Teqing of PRC. The results showed that Indica smooth riceRA73 had highest GCA effect of SFP in F1 hybrids of crosses in which RA73 was crossed with other varieties.There was the highest SCA effect of SFP (87, 7N) in F1 hybrid from cross indica smooth rice RA73 / japonicasmooth rice Mars and its reciprocal. It was reported by foregoers that Newbonnet mating with Japonica rice hadhigher compatibility. The SCA effect of SFP from cross RA73 / and its reciprocal higher significantly at P0.01 level than that of SFP(56. 5%) in the F1 hybrid from cross Newbonnet mating Mars and its reciprocal. RA73 had highcompatibility to Japonica rice Mars and could be used in the breeding program of the wide compatibility crossingwith Japonica rice in the future. The SFP(at 62. 3%) in F1 hybride from cross LaGrue /Mars and its reciprocalwas higher than that from cross Newbonnet/ Mars and its reciprocal. The lowest SFP in F1 hybrid from crossKaty/Mars and its reciprocal was 30. 9%. It was 54. 6% to the SFP of F1 hybride from cross Teqing/Mars and itsreciptocal. Although there was a same parent Bonnet 73 to RA73,Katy and Mars, but the compatibility of RA73,Katy or Newbonnet mating with Mars was different,