家蚕数量性状遗传通径网络

Genetic Path Network among Quantitative Characteristics in Silkworms

按随机区组设计饲养7个中系品种与7个日系品种组配的49个不完全双列杂交组合,调查估算22个数量性状间的遗传相关系数。根据遗传相关程度、蚕生长发育的内在联系及育种目标的要求,用通径系数分析各性状间的因果关系和相对重要性,结果绘制成通径网络图,为家蚕育种提供了重要的科学依据。

A set of 49 hybrids,obtained by crossing 7 chinese races with 7 japanese races according to partial diallel cross design,was reared in a randomized complete block experiment. Genetic correlation coefficients among 22 quantitative characters have been investigated and estimated. Based on the genetic correlation,internal relations of the characters in growth and development,and requirement of breeding aims ,causal relationships among the characters and their relative importance are analysed with the method of path coefficients The results are given in the path network figure.