西北林学院学报2012，Vol.27Issue(3)：68-71,4.DOI:10.3969/j.issn.1001-7461.2012.03.14
楸树苗期优良家系及单株的配合选择
Combined Selection of Excellent Families and Plus Trees of Catalpa bungei at Nursery Stage
摘要
Abstract
The growing traits of Catalpa bungei seedlings were analyzed, including seedling height, ground diameter, leaf length, leaf width, leaf area and leaf number. The results showed that the differences of these growing characters were significant among families, indicating great potential for selection. Significant differences were found among the heritability of all characters, but the values of heritability of all traits were higher than 0. 5. The values of heritability of height and ground diameter were 0. 581 and 0. 663, respectively, while the values of the heritability of leaf area and leaf number were 0. 683 and 0. 874. According to grading of breeding value, nine excellent families were selected. Expected genetic gains of height and ground diameter of the nine excellent families increased by 6. 32% and 11. 38%, respectively. Thirty-six plus tree were further selected form the excellent families. The tree height of the plus trees increased by 25. 87% and their genetic gain were 15. 03%. The plus trees can be used as standby materials in the establishment of excellent clone stands.关键词
楸树/苗期/遗传变异/配合选择Key words
Catalpa bungei/ seedling/ genetic variation/ combined selection分类
农业科技引用本文复制引用
翟文继,麻文俊,王秋霞,王平,王军辉..楸树苗期优良家系及单株的配合选择[J].西北林学院学报,2012,27(3):68-71,4.基金项目
林业公益性行业科研专项(201104001). （201104001）
