棕色棉纤维和短绒色泽遗传研究

[目的]阐明棕色棉纤维和短绒色泽的遗传规律。[方法]以棕色棉品系棕128为母本,白色棉品种FB20、库车T94-4、辽96-23-30为父本进行杂交,对亲本、F1、F2长纤维和短绒色泽的遗传分离进行了分析。[结果]纤维色泽至少受4对基因控制,长纤维和短绒棕色的有无各由1对显性基因控制,其纤维色泽类型至少还受2对微效基因控制,表现出淡棕、棕近白等不同类型。F2代长纤维共有棕色长纤维棕色短绒、白色长纤维白色短绒、白色长纤维棕色短绒3种表现型,表明基因间存在互作,棕色长纤维显性基因的表达抑制短绒色泽隐性基因的表达。[结论]该研究为彩色棉纤维和色泽遗传的进一步研究提供了参考。

Genetic Study on the Color of Fiber and Linter in Brown Cotton

[Objective] The aim was to expound the genetic law of the color of fiber and linter in brown cotton.[Method] The hybridization was conducted with brown cotton line Zong 128 as female parent,white cotton varieties FB20,Kuzhe T94-4 and Liao 96-23-30 as male parents.The genetic separations of the color of long fiber and linter in parents,F1 and F2 were analyzed.[Result] The fiber color was controlled by 4 pairs of genes at least.Whether the long fiber and linter were brown was controlled by a pair of dominant genes separately,the type of its fiber color was controlled by 2 pairs of minor genes at least,showing different types such as light brown and brown approaching white.The long fiber in F2 generation had 3 phenotypes altogether of brown long fiber and brown linter,white long fiber and white linter,white long fiber and brown linter,showing there was interaction among genes and the expression of dominant gene in brown long fiber inhibited the expression of recessive gene of linter color.[Conclusion] The study supplied reference for further studying colorful cotton fiber and color inheritance.