新疆农业科学2011，Vol.48Issue(5)：792-798,7.
早熟陆地棉亲本遗传距离与杂种优势的相关性分析
Correlation Analysis of Genetic Distance and Heterosis of Early Maturing Upland Cotton Parent Line
摘要
Abstract
[Objective] The purpose of this paper is to provide useful information for selecting the cross parent and predicting heterosis of early maturing upland cotton. [Method]12 parent lines are divided into two groups initially , and correlation analysis of genetic distanee based on the difference of phenotype and genotype and heterosis that is based on main characteristics in F1 was carried out. [ Result] The average genetic distance based on 5 principal components of two groups parent lines was from 3.097 to 9.097 in range with an average of 5.535.Combined with SSR molecular markers result, the genetic distance was from 2. 646 to 5.099 in range with an average of 4.18. In F1 of 36 combinations, the mid - parent heterosis of the growth periods, bolls per plant, boll weight, lint percentage, fuzz length, row cotton yield, and lint yield was 0.367, - 1.256, 14. 176, 6.691,1 . 000, 11 .206 , and 15 .235 , respectively , the over - parent heterosis was - 0.966 , - 1 .464 , 6.457 , 0 . 110,- 2.500, 7.561, and 10.816, respectively. There was only an extremely significant positive correlation between the genetic distance based on the principal components and the mid - parent heterosis of F1 lint percentage. The genetic distance based on SSR molecular markers result had significant negative correlation with over - parent heterosis of lint percentage and fuzz length, mid - parent heterosis of the growth periods, respectively.[Conclusion] Early maturing upland cotton boll weight and yield characters had higher heterosis, and lint percentage had higher mid - parent heterosis. The genetic distance of two groups' parent lines is only significantly related with partial characters of F1, and has no simple linear relationship with yield. Genetic distances of partial characters increase with heterosis increasing but some properties decreased.关键词
早熟陆地棉/遗传距离/杂种优势/相关性Key words
early maturing upland cotton/ genetic distance/ heterosis/ correlation分类
农业科技引用本文复制引用
田琴,孔宪辉,余渝,刘丽,王旭文,王娟,邓福军..早熟陆地棉亲本遗传距离与杂种优势的相关性分析[J].新疆农业科学,2011,48(5):792-798,7.基金项目
国家科技支撑计划项目(2007BAD44B01) （2007BAD44B01）
新疆生产建设兵团产学研重大专项(2006GG20) （2006GG20）
新疆农垦科学院引导计划(YYD2010-7) （YYD2010-7）
