棉花叶绿素荧光诱导动力学参数遗传分析

Genetic Characteristics of Chlorophyll Fluorescence Parameters of Cotton Leaves

选用6个荧光参数有显著差异的棉花品种(系),采用NCⅡ遗传交配设计配制9个组合,应用AD模型对其盛花期叶片叶绿素荧光诱导动力学参数进行了遗传分析。结果表明,棉花叶片叶绿素荧光诱导动力学参数中Fv/Fm、Fv/Fo与NPQ以显性方差为主,qP以加性方差为主。Fv/Fo具有较高的狭义遗传率,Fv/Fm和Fv/Fo的广义遗传率均达到极显著水平。Fv/Fm、Fv/Fo与产量间均存在很高的加性相关,显性相关均为负值且达到极显著水平,与纤维长度、麦克隆值相关性也较高。qP、NPQ与主要经济性状间的相关系数为负值。

NC ⅡCross design with six cotton varieties as parents were conducted in Shihezi Agricultural Institute in order to estimate genetic variance, variance ratio, heritability and genetic correlation with important economic traits of the chlorophyll fluorescence parameters of cotton leaves. The results showed that dominant variances were most important in Fv/Fm,Fv/Fo and NPQ, but that there were additive variances in qP. The narrow sense heritability of Fv/Fo were also the highest while Fv/Fm and Fv/Fo were significant at 0. 01 level in the broad sense heritability. The dominant correlation effects of Fv/Fm to yield traits were negative and significant and that Fv/Fm correlated well with fiber characters, qP,NPQ were correlated negatively with important economic traits.