西北林学院学报2001，Vol.16Issue(2)：5-9,5.
鹅掌楸属种间杂种苗期生长性状的遗传变异与优良遗传型选择
Variation and Selection of Interspecific Hybrid in Liriodendron
李周岐 1王章荣2
作者信息
- 1. 西北农林科技大学林学院,
- 2. 南京林业大学森林资源与环境学院,
- 折叠
摘要
Abstract
Using one opening pollinated family of Liriodendron chinense as check,the variation of height and GLD (ground line diameter) traits among 4 matting systems and among and within 23 hybrid families in Liriodendron were studied based on the increment after the second growing season.The results revealed that the 4 matting systems of direct cross,reciprocal cross,back cross and cross among F1 individuals did not have significant difference,while the families within matting systems different significantly (P<0.01).The mean CV within families in height and GLD traits were 29.16% and 31.87%,respectively.The mean ranges within families in the two traits were 2.31 m and 2.63 cm,respectively.Therefore,the 4 matting systems all could be used.But for obtaining higher heterosis and gain,family selection and within family selection should be carried out.If the 10 superior families were selected,the gains in height and GLD would be 8.30% and 9.73%,respectively,compared with the mean of overall hybrid families.Seven superior individuals with mean height 3.68 m and mean GLD 4.4 cm had be selected.The gains in height and GLD were 45.83% and 82.17% respectively.关键词
鹅掌楸属/杂种家系/遗传变异/选择分类
农业科技引用本文复制引用
李周岐,王章荣..鹅掌楸属种间杂种苗期生长性状的遗传变异与优良遗传型选择[J].西北林学院学报,2001,16(2):5-9,5.
