贵州芥菜型油菜生育期的遗传力和遗传进度初步研究

PRELIMINARY STUDY ON HERITABILITY AND GENETIC ADVANCE OF MAJOR GROWING STAGE OF.JUNCEA IN GUIZHOU

对贵州芥菜型油菜地方品种的几个主要生育用性状的遗传力、遗传进度及遗传变异系数进行了研究。结果表明：遗传力的大小依次为：抽苔期→初花期→现蕾期→成熟期→终花期。遗传进度的顺序为：抽苔期→初花期→现蕾期→终花期→成熟期。遗传变异系数为：抽苔期→初花期→现蕾期→终花期→成熟期。抽苔期、初花期的遗传力较高（为８５．０３％和８４．０８％），遗传进度较大（为５２．４６％和４９．１８％），遗传变异系数也较大（为２７．０４％和２５．９５％），即在早期世代对抽苔期和初花期进行选择的效果较佳。

The heritability,genetie advance and genetic variable coefficient of major growing stages ofthe local B.juncea varieties in Guizhou were studied.The results showed as follow.The heritabilityof different growing stages was in order of bolting→first flowering→squaring→maturing→endflowering stage.The order of the genetic advance was bolting→first flowering→squaring→endflowering→maturing stage.The order of genetic variable coefficient was bolting→firstflowering→squaring→end flowering→maturing stage.The heritability of the bolting and firstflowering stage is high for 85.03%and 84.08%.The genetic advance of them is greater for52.46%and 49.18%.The genetic variable coefficient is greater for 27.64%and 25.95%.Thispointed out that the selection for the bolting and first flowering stage in early generation ismore effective.