Genetic Test of New Cottonwood Clonesat Nursery Stage  

作　　者：QINGuanghua JIANGYuezhong 

机构地区：[1]ShandongAcademyofForestry,Jinan250014,P.R.China

出　　处：《Chinese Forestry Science and Technology》2004年第1期67-73,共7页中国林业科技（英文版）

基　　金：SupportedbyShandongDepartmentofScienceandTechnology

摘　　要：Twenty-five new clones belong to Populus Aigeiros of both domestic and foreign origin hadbeen introduced and tested at nursery stage in Shandong province. Results showed that height (H),diameter at stem base (D0) and survival rate (SR) varied significantly and genetic variation were very largeamong the clones. CVg and broad-sense heritability (h2) of H, D0 and SR of 1-year-old stock nursery were7.43%, 9.25%, 18.78% and 78.91%, 96.31%, 95.93%, respectively, showing high genetic control on thetested traits. 11 superior clones with characteristics of high growth rate and medium or high SR wereprimarily selected and genetic gains (△G) of H, D0 and SR were 16.89%, 16.08% and 13.08%, respectively.Rooting habits test of some selected clones were also conducted based on the cutting culture in watercontainer and annual growth increment measured. The date of first root emergence, number of main roots,number of lateral roots, length of main roots and the emergence date of growth peak varied to certain degreeamong the selected clones.Twenty-five new clones belong to Populus Aigeiros of both domestic and foreign origin hadbeen introduced and tested at nursery stage in Shandong province. Results showed that height (H),diameter at stem base (D0) and survival rate (SR) varied significantly and genetic variation were very largeamong the clones. CVg and broad-sense heritability (h2) of H, D0 and SR of 1-year-old stock nursery were7.43%, 9.25%, 18.78% and 78.91%, 96.31%, 95.93%, respectively, showing high genetic control on thetested traits. 11 superior clones with characteristics of high growth rate and medium or high SR wereprimarily selected and genetic gains (△G) of H, D0 and SR were 16.89%, 16.08% and 13.08%, respectively.Rooting habits test of some selected clones were also conducted based on the cutting culture in watercontainer and annual growth increment measured. The date of first root emergence, number of main roots,number of lateral roots, length of main roots and the emergence date of growth peak varied to certain degreeamong the selected clones.

关 键 词：Populus Aigeiros CLONE genetic test heritability (h^2) genetic gains (△G) 

分 类 号：S792.11[农业科学—林木遗传育种]