油用向日葵主要农艺性状的遗传效应及相关性研究

根据加性-显性与环境互作的遗传模型,对6个油用向日葵自交系及其配制的9个杂交组合在2个环境下的7个农艺性状表现进行遗传分析,揭示油用向日葵主要农艺性状遗传性质、规律以及主要农艺性状对含油率的贡献率。结果表明:株高、茎粗、盘径、百粒重、籽仁率和单盘粒重等6个遗传性状主要受加性和显性共同控制,结实率的遗传以加性、显性×环境互作效应为主,籽仁率、单盘粒重以加性、显性、显性×环境互作效应为主;性状间的各项遗传相关性多以加性遗传相关为主。百粒重的净效应对籽实含油率的加性遗传方差贡献率最高,结实率的净效应对籽实含油率的显性遗传方差贡献率最高,单盘粒重对籽实含油率的加性×环境互作遗传方差的贡献率最高。

Genetic Effects and Correlation Analysis for Agronomic Traits in Oil Sunflower

According to the genetic model of additive-dominance and its interactions with environments,seven agronomic traits in two environments were analyzed with six inbred lines and their nine F₁ hybrids of oil sunflower.The results showed,additive and dominance effects were the major genetic component for plant height,stem diameter,disc diameter,100-GW,kernel percentage and GW per disk.Fertile percentage was mainly controlled by additive effects and dominance×environment interaction effects.Additive effects,dominance effects,and dominance×environment interaction effects played a major role for kernel percentage and GW per disk.The analysis of correlation among agronomic traits indicated that additive correlations were predominance in genetic correlations for most pairs of traits.Farther,the study also indicated that the contribution of additive variance of 100-GW to oil content of seeds was larger than other agronomic traits.The largest contribution of dominant variance to oil content of seeds was due to the fertile percentage.And the largest contribution of additive×environment interaction effects to oil content of seeds was due to the GW per disk.