大豆主要农艺性状的遗传分析

大豆农艺性状和产量性状属数量性状遗传,本研究以不完全双列杂交组合为材料,以朱军(1997)提出的混合模型方法分析大豆形态和产量性状的加性、显性和上位遗传效应.结果表明,大豆的株高、节数、粒重、粒数及总荚数等性状受基因显性效应影响,且显性方差比率最大;节数、单株产量、百粒重等性状受加性效应的影响,但作用较小;株高和单株粒数也受到上位效应的影响,但作用较小.各形态性状的广义遗传率较高,但狭义遗传率却较低.单株产量与株高、粒数、总荚数呈极显著正相关,与百粒重呈负相关.在各遗传分量中,各相关系数以显性相关系数为主.

GENETIC ANALYSIS OF YIELD AND MORPHOLOGY TRAITS OF SOYBEAN ( G.max L.merr)

Yield and morphological traits of soybean are quantitative genetics. The additive effect, dominance effect and epistatic effect were analysized with incomplete diall cross by the mixed model proposed by Zhu(1997) In this experiment. The result showed that plant height, number of nodes, seed weight per plant, the number of particles and total number of pods were mainly controlled by dominance effect, number of nodes,seed weight per plant and 100 seed weight were controlled by additive effect,plant height and number of seeds per plant were controlled by epistatic effect, the broad heritibility of all traits were high, while the narrow heritibility were low, in all genetic effects, the dominance correlation was high.