结球甘蓝单株产量与表型数量性状的灰色关联度分析

Grey correlation analysis of yield per plant and phenotypic quantitative traits of cabbage

为明确结球甘蓝表型数量性状对单株产量影响的主次关系,促进高原冷凉区结球甘蓝新品种选育,运用灰色关联度分析法,对9份结球甘蓝新配组合单株产量与表型数量性状进行分析。结果表明,结球甘蓝单株产量与14个表型数量性状的关联度大小依次为:叶球横径>叶球纵径>中心柱高度>绿层数>绿层厚度>中心柱高度/叶球高>叶片长度>叶片宽度>外茎长度>外叶质量>开展度>中心柱宽度>株高>外叶数。叶球横径和叶球纵径对单株产量的影响最大,与单株产量的关联度分别为0.7855和0.7433。因此,在结球甘蓝杂交育种过程中,以产量为育种目标,优先考虑叶球横径和叶球纵径这2个性状,可以获得单株产量较高的结球甘蓝新品种。

To clarify the primary and secondary relationship between phenotypic quantitative traits of cabbage and yield per plant,so as to promote the breeding of new varieties of cabbage in cold area of plateau.The results showed that the correlation between yield per plant and 14 phenotypic quantitative traits were as follows:Leaf head diameter>leaf head longitudinal diameter>stele height>green layer number>green layer thickness>stele height/leaf head height>leaf length>leaf width>outer stem length>head weight>expansion>stele width>plant height>outer leaf number.The results showed the transverse diameter and longitudinal diameter of leaf bulb had the greatest effect on yield per plant,and the correlation degree between the two traits and yield per plant was 0.7855 and 0.7433,respectively.Therefore,when yield was target in cabbage hybrid breeding,the two factors,leaf head transverse diameter and leaf head longitudinal diameter,should be given priority to obtain new varieties of cabbage with higher yield per plant.