中国高粱地方品种茎粗的遗传研究

A Study on Heritance of Stalk Diameter of Endemic Sorghum Varieties in China

摘要:

本文采用世代平均分析的多元回归法对中国高粱地方品种的茎粗进行了研究。结果表明：不同杂交组合F₁代茎粗表现不同，但均为正向优势，倾向于高值亲本，茎粗的加性效应是主要的，平均占总遗传变异的33.2％，上位效应比显性效应更加重要，但显性效应在某些组合起一定作用。3个组合基因效应结果表现不同，但加性效应值及显性效应值为正值，可能是杂种F₁代茎粗正向优势的原因所在。

Abstract:

Stalk diameter of endemic sorghum varieties in China was studied hy using multivariate regression analysis method of generation mean analysis. The results showed that stalk diameters in F₁ were different among different cross combinations, but hetemeis was positive and tended to the parent with high combining ability. Additive effect for stalk diameter was main and 33.2% of total genetic variation. Epistasis effect should be more important than dominant effict, but dominant effect took effect on some cross combinations. Gene effect of 3 cross combinations presented different. Additive effect and dominant effect were positive, and they were the reason that stalk diameter in F₁ presented positive heterosls.