【摘要】 对两种杂交组合形式、三个系列类型和三个产量性状多年选择所得结果进行了遗传参数分析,表明:二棱大麦品种间杂交组合（二棱×二棱）,三个产量性状F₁代的广义遗传力较高,F₂代具有明显的选择效果,但到F₄代以后,随着选择差和相对遗传进度的减小,选择效果逐渐减退,难以选择到理想的目标品种.相反,亚种之间杂交组合（多棱×二棱）,三个产量性状F₁代的广义遗传力均低,早代选择效果差,现实遗传力及相对遗传进度到了F₃代才达到最高值,而且性状遗传增量很大,可望选择到理想的目标品种.因而,评价选择效果的好坏,不仅要考虑遗传力的高低,更主要的取决于性状遗传获得量的大小.即相对遗传进度的大小.更多还原

【Abstract】 The genetic parameters of 3 yield characters were analysed as 2 combinalion forms for 3 series of cross barley varieties. The generalized her ability of 3 yield characters were high on F1 of the cross combination between cultivars of bailey (two-towed×two-rowed) , the selecting effect was evident on F2, but it gradually came down with the decrease of the selecting difference and correlation ge-netin advance since F4. So the ideal target-cultivar was difficult to get. In contrast, the generalized hetitability of 3 yield characteters was low on F1 of the cross combination between subspecies (six-rowed×wo-rowed) , and the selecting effect of early generation was not good, the highest value of realistic heritability and conelation genetic advance was got till Fs, also the genetic gain of characters increased highly. So the idcal target-cultivar would be got. Therefore the researchers thought that the selecting effect mainly depended on the genetic gain of characters, namely conelation genetic advance besides the hejitability.更多还原