辣椒净光合速率Hayman双列杂交分析

用辣椒(Capsicum annuum L.)6个亲本,按(1/2)n(n-1)双列杂交法配制15个杂交组合,用Hayman双列杂交分析法估算不同开花结果时期净光合速率的遗传参数。阵列协方差(Wr)对阵列方差(Vr)的回归分析结果表明,辣椒开花结果前期、中期、后期净光合速率的遗传都不符合“加性-显性”模型。Wr Vr与亲本Yr间的相关分析表明含有更多高净光合速率,显性基因的亲本具有较大的Wr Vr值。遗传参数估算表明开花结果时期的净光合速率遗传是显性效应比加性效应更加重要,同时还存在显著上位性效应。狭义遗传力较小,开花结果中、后期杂种优势比前期明显。

Hayman Diallel Cross Analyses of Net Photosynthetic Rate in Pepper (Capsicum annuum L.)

Genetic parameters in net photosynthesis were determined by Hayman method during flowering and fruit set stages of 6 peper (Capsicam annuum L.) parent cultivars and their 15 cross combinations established by the (1/2) n (n-1) diallel cross. The results of regression analysis of array covariance (Wr) and array variance (Vr) indicated that the net photosynthetic rate didn't genetically coincide with the additive-dominant model. The results of correlation analysis of Wr Vr and parent Yr indicated that Wr Vr values were larger in the parents with more dominant genes governing high net photosynthetic rate. The genetic parameters showed that the dominant effect variance was more importance than the additive one in the inheritance of net photosynthesis during the flowering and fruit set stages,and epistatic effect was found significant as well. The parents had low narrow heritability and the heterosis was less obvious at the early stages of the flowering and fruit set than the middle and late stages.