大白菜与花椰菜种间杂交结实性调查

Study of Seed Characteristics from Interspecific Hybridization between Chinese Cabbage and Cauliflower

通过对大白菜与花椰菜及其异源三倍体、异源四倍体进行种间远缘杂交,观察杂交当代结荚、结籽特异性;对二倍体、多倍体蕾期和花期杂交,以及二倍体与二倍体、二倍体与多倍体的正反交,观察分析杂交后不同组合的结荚、结籽特性。结果表明:蕾期自交与花期自交的结实性差异不大,其中三倍体自交几乎得不到种子;以染色体数目多的材料为母本,杂交亲和力明显高于以染色体数量少的材料为母本的杂交组合。

The specificity of pod-bearing and seed-bearing of hybrid comemporary was observed by interspecific distant hybridization between Chinese cabbage, Cauliflower and their allotriploid, allotetraploid. The specificity of pod-bearing, seed,bearing of different combinations was also observed and analyzed for selfing crosses of diploids and polyploid pud and flower periods, reciprocal crosses of diploid and diploid, diploid and polyploid. The results showed that the difference of pud period selfing and flower period selling was little, and allotriploid selling almost could not obtain seeds. With which chromosome number was large as female combinations which chromosome number was small as parent, their hybrid affinity was significantly higher than hybrid female parent.