芥蓝主要经济性状的配合力及遗传力分析

Analysis of Combining Ability and Heritability of Economic Traits in Chinese Kale

选用综合生产性能表现较好、性状差异较大的5个芥蓝自交系,采用Griffing完全双列杂交方法IV组配10个杂交组合,对8个经济性状进行了配合力分析,对其中差异显著的5个经济性状进行了遗传力参数分析。结果表明:5个经济性状均受到加性效应和非加性效应影响,其中薹质量、薹粗和叶宽主要受基因加性效应控制,单株质量同时受显性效应和加性效应控制,节间长则以显性效应为主。综合比较5个芥蓝自交系杂交组合后代表现,亲本A(0925)和亲本D(0948)一般配合力(GCA)较高,与其配组可望得到特殊配合力(SCA)最高的F1,但在亲本选配时还应考虑双亲间的特殊配合力。

Ten hybrid combinations were obtained from 5 Chinese kale(Brassica alboglabra Bailey)inbred lines with better productive performance and significant different traits by Griffing incomplete double-row crossing design.Combining ability analysis was conducted on 8 economic traits,and genetic parameter analysis was carried out on 5 economic traits with significant difference.The results show that the 5 economic traits are affected by the additive and non-additive effects.Among them the quality and thickness of carex dispalatha and leaf width are mainly controlled by gene additive effect,the quality of single plant is controlled at the same time by dominant and additive effects,while the internodes length is controlled mainly by dominant effect.By comprehensive comparison between 5 inbred hybrid offspring performances of Chinese kale,we find parent strain A(0925)and parent strain D(0948)have high general combining ability(GCA).Its distribution group is expected to gain the highest F1 offspring with special combining ability(SCA),but the special combining ability between parents should be considered in the selection.