Interspecific distant hybridization between Brassica juncea with multiloculus and Brassica napus

Seed setting, crossability, and influnce of different Brassica napus genotypes in interspecific hybridization between Brassica napus and Brassica juncea with multiloculus were studied, the result showed that less full seeds were formed by reciprocal crossing, but the ability of Brassica juncea×Brassica napus to form full seeds was stronger than that of Brassica napus×Brassica juncea; and its fertile rate and hybrid embryo development was also stronger, however there was no significant difference on ovary development after pollinating. So the way of Brassica juncea×Brassica napus should adopted in setting up new resource of interspecific hybridization. The pods rate, the fertile index, the seed index and the crossability index by reciprocal crossing between different varieties in Brassica napus×Brassica juncea with multiloculus were all different, and CV of crossability index was max, so to screen genotype in Brassica napus with stronger crossability should aim at parent materials in Brassica napus with high crossability index. From the experiment, the hybrid embryo through Brassica juncea with multiloculus×932211 in B.napus had stronger developmental ability.