摘要
本文运用数量遗传学原理和方法,估算了低酚棉数量性状的八个主要遗传参数.并探讨这些参数对改进育种方法,提高选择效率的指导意义。结果表明:低酚棉品种间主要数量性状的遗传变异潜力较小,简单杂交遗传基础贫乏,衣分、绒长、单铃重等性状的遗传力较高,早代选择可靠性大,皮棉产量和烂铃率性状,早代注重对群体选择易凑效,通过相关选择,增加产量遗传进展的效果低于直接选择,相对而言,衣指、衣分、单株铃数的相关遗传进度值较大。因此,低酚棉育种在进行丰产性选择时,应以产量较高的组合为基础,综合考虑其它性状的相互影响。
The genetic parameters,genetic variation coefficient,hereditary capacity and genetic advance,of twenty quantitatively-inherited traits were studied with eighteen low gossypol content cottons.The results indicated that the genetic(variation)potential of most quantitative characters was relatively lower and that of crosses of the varieties was very limited;and that lint percentage,staple length and the weight of boll were found to have higher hereditary capacities.In early generation selection,these traits were with larger reliability.The selective effects of rotting boll ratio and lint yield were also relatively higher.The effect of relative selection was lower than that of direct selection iu yied increasing.The results shown grea ter relative genetic advances in lint index,lint percentage and the numbers of boll per plant,and ther- efore,in order to enhance yield selective effect in breeding,of low gossypol content cotton,it should be based upon high productive combinations.Meanwhile,in selecting,the yield characters it must concern the inter--influences of the others.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1989年第4期34-38,共5页
Journal of Hebei Agricultural University
