摘要： 依据Logistic生长拟合曲线，把小麦株高、单株叶数和千粒重等性状建成划分为四个生长时期。采用世代平均值分析法，对不同生长时期的净增量进行了基因效应分析。结果表明，各性状不同生长时期基因作用的方向和程度具有明显差异，遗传模型也有所不同，并且各个时期的基因效应相互独立。上位性效应对于株高和单株叶数的遗传具有重要作用，而粒重的遗传基本符合加性-显性三参摸型。

关键词: 小麦, 生长时期, 基因效应

Abstract: The experimental materials included 3 crosses from 6 parents of wheat. Generation mean analysis method was used to study gene effect of plant height, leaf number per plant and 1000 grain weight at different growing stages. Algebraic symbol and significance of the gene effect, and genetic model for each character showed distinct changes with its growing stage and its parents of the cross,which were considered as the result of actions of different gene loci at each stage and the genetic structure of the population derived from different parents. The addtive dominance model fited to the inheritance oF ₁000 gain weight, but epistatic effects were present in the inheritance of plant height and leaf number per plant.

Key words: Wheat, Growing stage, Gene effect

中图分类号: 

• S512.1