花椰菜主要经济性状的配合力分析

Analyses on Combining Abilities of Main Economical Characters in Cauliflower(Brassica oleracea var.boirgtis)

采用６×６双列杂交法研究了花椰菜１０个经济性状的配合力，结果表明：现球期、成熟期、株高、株展、单株生物学产量、叶片数等性状在相当程度上受非加性基因控制；单株经济产量和与花球质量有关的花球直径（球径）、花球纵径、紧实度等性状则受加性基因效应影响大。亲本的一般配合力与其组合的特殊配合力间无必然联系，彼此独立，而且均与Ｆ１表现呈正相关关系。特殊配合力与Ｆ１关系更为密切，选择亲本时应在注重特殊配合力选择的同时。

Studies have been carried out on combining abilities of 10 economical characters by the method of 6×6 biserial cross on cauliflower(Brassica oleracea var boirgtis).Results showed that characters of beginning of heading stage,maturity,plant height,plant expansion,biological yield of single plant and leaf blade numbers were considerably controlled by non additive genes.The economical yield of single plant,diameter,vertical length and compactness of flower head were considerably controlled by additive genes.There was no obvious relationship between normal combining abilities and special combining abilities of parents,although both of them significantly decided characters of F 1 generation,especially the special combining abilities.It was suggested that attention should be paid both to special combining abilities and normal combining abilities when selecting parents for breeding practice.