家蚕主要经济性状中亲值与杂交一代成绩相关性的Meta分析

The Correlation Between F_1 Hybrid Performance and Mid-parent Value in Main Economic Characters of Silkworm by Meta-analysis

主要经济性状中亲值与杂交一代表现成绩之间的相关性是亲本选择及杂交组合选配的重要依据之一。依据8次独立的试验数据,对家蚕的15项重要经济性状的中亲值与杂交一代表现成绩的相关系数进行Meta分析,获得15项性状的中亲值与杂交一代表现成绩间的225个相关系数的Meta分析综合效应值、每个效应值的标准误差及其同质性检验结果,揭示了家蚕15项经济性状的中亲值与杂交一代表现成绩间的内在关系。其中:杂交一代的茧层率与其中亲值的相关程度最高;相关程度较高的有杂交一代的茧层量、茧丝长、纤度和出丝率与其中亲值,杂交一代的万蚕产茧层量与茧层率和茧层量的中亲值,杂交一代的出丝率与茧层率的中亲值,杂交一代的茧丝长与茧层率的中亲值。此外,还存在47个中等相关性的综合效应值。研究结果可供家蚕育种亲本选择及优良杂交组合选配参考。

The correlation between mid-parent value of main economic characters and F1 hybrid performance is one of the key references for selection of parental strains and preparation of hybrid combinations in breeding practice. Meta- analysis was conducted to study the correlation of mid-parent value of 15 economic characters with F1 hybrid perform- ance on basis of data sets from 8 independent experiments. As a result, 225 pooling effect sizes, standard errors and homogeneity test results of each effect size were obtained, and the internal relationship between mid-parent values of the 15 economic characters and F1 hybrid performance was revealed. The results indicated that cocoon shell rate had the highest relationship with mid-parent value. In addition, high correlation existed between cocoon shell weight, cocoon fila- ment length, filament size and raw silk rate of F1 cocoons with their mid-parent values respectively, between cocoon shell weight per 10 000 larvae of F1 hybrid with mid-parent values of cocoon shell rate and cocoon shell weight, between the raw silk rate of F~ hybrid and the mid-parent value of cocoon shell rate, and between the cocoon filament length and mid- parent value of cocoon shell rate. Furthermore, medium correlation was observed in 47 pooling effect sizes. These results provide good references for selection and breeding of parental silkworm strains and preparation of excellent hybrid com- binations.