美洲黑杨×欧美杨F_1无性系生长动态分析  

Growth Dynamic Analysis on New Clones of Poplus deltoides (I-69)× P.euramericana (I-45)

作　　者：管兰华[1] 潘惠新[2] 黄敏仁[2] 施季森[2] 

机构地区：[1]中日合作湖北省林木育种中心 [2]南京林业大学林木遗传与基因工程重点实验室

出　　处：《林业科技开发》2005年第1期20-23,共4页China Forestry Science and Technology

基　　金：国家"九五"攻关课题 :杨树单板类人造板材新品种选育及培育技术研究 (编号 :96 - 0 1 1 - 0 2 - 0 4 )。

摘　　要：利用美洲黑杨×欧美杨F1无性系 12a的生长数据 ,对黑杨派种间杂种的生长进行了动态分析。各无性系之间生长存在极显著差异 ,前 3a生长不稳定 ,从第 4年开始 ,遗传力逐渐增大 ,并趋于稳定 ,胸径、树高和材积第11年的遗传力分别为 0 6 5、0 75、0 5 1,表明胸径和树高比材积更受遗传的控制。第 4年与第 11年的遗传相关系数分别为 0 90 96 (树高 )、0 94 80 (胸径 )、0 92 5 1(材积 ) ,说明树木生长的早晚相关是非常密切的 ,早期选择宜在第 3年进行。通过Logistic曲线对 12a的数据进行数学模拟和年增长量的计算可知 ,黑杨派种间杂种的速生期为定植后 2～ 6a ,黑杨派种间杂种超短周期工业用材林的皆伐时间最早宜在第 6年。The dynamic analysis of height, DBH, and volume were done based on the data taken from 12years＇ plantation of clones ofPoplus deltoides（I-69） × P.euramericana（I- 45）. There were significant differences in these 3 traits among clones. The growth patterns were unstable during the first 3 years, however,from the 4th year, the heritability estimates of the 3 traits increased gradually and became stable. The heritability estimates of height, DBH, and volume at the 12th year were 0.65, 0.75, and 0.51 respectively,which indicated that the height and DBH were more controlled by genes than the volume. The genetic correlation coefficients of height, DBH and volume between 4th year and 11 th year were 0. 909 6, 0. 948 0 and 0.925 1 respectively, indicating that the juvenile-mature genetic correlation was high, and the optimum early selection age could be at the 3rd year. According to the logistic curve and the annual increase chart of three growth characters, it was concluded that the fast-growth stage was during the 2nd to the 6th year, and 6 years＇ growth was necessary for poplar of super short-term industry material.

关 键 词：动态分析 遗传力 遗传相关 美洲黑杨×欧美杨 F1无性系 无性系生长 美洲黑杨 F1 Logistic曲线 欧美杨 

分 类 号：S793.602[农业科学—林木遗传育种] S792.11[农业科学—林学]