叶绿素荧光特性在棉花杂种优势预测中的应用研究

选用6个在荧光特性方面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,应用朱军提出的AD模型,对其盛花期杂种F1、F2的主要荧光性状、经济性状等杂种优势以及各性状间的相关关系进行分析,结果表明:Fv/Fm、Fv/Fo的群体平均、超亲的正向优势比较明显,qP的群体超亲具有负向优势,且达到0.05的显著水平;F1、F2的NPQ群体平均、超亲的负向优势比较明显。F1、F2主要经济性状的群体平均、超亲多表现为负向优势。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、马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。

Application of Chlorophyll Fluorescence to Prediction of Cotton Heterosis

Heterosis,combining ability and genetic correlation with important economic traits of chlorophyll fluorescence parameter of cotton leaves were investigated by way of NCⅡcross design with 6 cotton varieties as parents.The results showed that Heterosis positive mid-parent and better-parent value based on population mean of Fv/Fm,Fv/Fo were significant.Heterosis negatively betterparent value based on qP of chlorophyll fluorescence parameter were significant at 0.05 level.Heterosis negatively mid-parent and better-parent value based on NPQ and important economic traits were majority.The dominant correlation effects of Fv/Fm with yield traits were negative and significant and Fv/Fm were correlated well with fiber characters.qP,NPQ with important economic traits were correlated negatively.