山柰落叶松半兄弟系生长性状的正向、向后选择及变异分析

IF 1.1 4区 农林科学 Q3 FORESTRY
Xiyang Zhao, Ya-Shu Pan, Xiaona Pei, Fuwei Wang, Chenglu Wang, Lili Shao, Lihu Dong, G. Qu
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引用次数: 8

摘要

摘要对30个日本落叶松半兄弟科不同年龄的树高和胸高径进行了分析。方差分析显示,不同家庭间的生长差异显著。不同年龄家系间树高和胸高径表型变异系数分别为11.04% ~ 31.74%和19.01% ~ 19.83%。树高和胸径的平均遗传力分别为0.87 ~ 0.96和0.93 ~ 0.96。各性状在不同年龄段间呈显著正相关。采用多性状综合选育法,以20%的选育率在12岁时筛选出L18、L12、L8、L3、L25和L20 6个优良家族。这些精英家族的胸高和胸径平均比总平均值高11.15%和16.83%,遗传增益分别为10.53%和15.79%。以5%的选育率选育出45株优秀单株,分别比株高和株径的整体平均值高出23.47%和24.90%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Forward, backward selection and variation analysis of growth traits in half-sib Larix kaempferi families
Abstract Tree height and diameter at breast height of 30 half-sib Larix kaempferi families were analyzed at different ages. Analysis of variance revealed a significant difference in growth among different families. Phenotypic variation coefficients of the traits tree height and diameter at breast height among families of different ages ranged from 11.04 % to 31.74 % and 19.01 % to 19.83 %, respectively. Average heritability of tree height and diameter at breast height ranged from 0.87 to 0.96 and 0.93 to 0.96, respectively. Significant positive correlations were observed among all traits at different ages. By the method of multiple-traits comprehensive, six families (L18, L12, L8, L3, L25 and L20) were selected as being elite using a 20 % selection ratio at 12 years of age. Average values of these elite families were 11.15 % and 16.83 % higher than the total average for height and diameter at breast height, and genetic gains were 10.53 % and 15.79 %, respectively. Forty five elite individual plants were selected using a 5 % selection ratio which were 23.47 % and 24.90 % higher than the overall average for height and diameter at breast height, respectively.
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来源期刊
Silvae Genetica
Silvae Genetica 农林科学-林学
CiteScore
2.20
自引率
10.00%
发文量
10
审稿时长
3 months
期刊介绍: Silvae Genetica is an international peer reviewed journal with more than 65 year tradition and experience in all fields of theoretical and applied Forest Genetics and Tree breeding. It continues "Zeitschrift für Forstgenetik und Forstpflanzenzüchtung" (Journal of Forest Genetics and Forest Tree Breeding) founded by W. LANGNER in 1951.
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