棉花永久F_2群体纤维品质性状的遗传分析  

Analysis of Genetic Effects for Fiber Quality in Upland Cotton Immotalized F_2 Populations

作　　者：王保勤[1] 刘书梅[1] 李宾[1] 李俊文[2] 韩艳红[1] 贾新合[1] 

机构地区：[1]郑州市农林科学研究所,郑州450005 [2]中国农业科学院棉花研究所,河南安阳455000

出　　处：《湖北农业科学》2016年第22期5758-5760,共3页Hubei Agricultural Sciences

基　　金："十二五"国家"863"计划项目(2012AA101108-02-12);郑州市院士工作站建设计划项目(131PYSGZ209)

摘　　要：利用不同环境下种植的棉花(Gossypium hirsutum L.)永久F_2群体,获得2年三环境的永久F_2群体资料。估算纤维品质性状各项遗传方差比值和进行品质性状杂种优势预测。结果表明,永久F_2群体的纤维品质5个性状的遗传方式基本一致,都受加性、显性以及加性和环境互作的影响,纤维长度和伸长率以加性和显性效应为主,整齐度以显性效应为主,马克隆值以加性以及加性和环境互作效应为主,均达到极显著水平。纤维比强度的遗传受加性、显性以及互作效应的作用较小,作用不显著。永久F_2群体的杂种优势预测估算结果表明,永久F_2群体的纤维品质性状杂种优势非常小,中亲优势小于3%,并且伸长率性状呈负向杂种优势。试验结果可为合理利用永久F_2群体材料提供理论依据。Planting the Immotalized F2populations（IF2） in different environment,Data of permanent population in two years was analyzed for five traits of fiber quality under three environments, and genetic variance components and heterosis were estimated as well. The results showed that the five characters related to fiber quality were controlled by additive effects, dominant effects and additive×environment effects. The main effects in 2.5% staple strength and elongation were dominant effects and additive effects, uniformity was mainly dominant effects, while micronaire was additive ×environment effects. They all reached extremely significant level. The small effects in fiber strength was additive, dominant and epistatic effects. It＇s not significant. Prediction of heterosis estimation on permanent groups indicated that the heterosis in permanent IF2 populations was very little, with less than 3% for mid-parent and a negative heterosis for elongation. The experimental results provided a theoretical basis for the rational use of permanent IF2 populations.

关 键 词：棉花(Gossypium hirsutum L.) 永久F2群体 纤维品质 杂种优势 遗传率 

分 类 号：S562[农业科学—作物学] S331