文献类型：期刊文献

英文题名：Genetic parameters for growth and wood chemical properties in Eucalyptus urophylla x E. tereticornis hybrids

作者：Chen, Shengkan[1,2] Weng, Qijie[2] Li, Fagen[2] Li, Mei[2] Zhou, Changpin[1,2] Gan, Siming[1,2]

第一作者：Chen, Shengkan

通信作者：Zhou, CP[1];Gan, SM[1];Zhou, CP[2];Gan, SM[2]|[a0005799754fef51dde9a]周长品;

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Xiangshan Rd, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry, 682 Guangshan 1 Rd, Guangzhou 510520, Guangdong, Peoples R China

年份：2018

卷号：75

期号：1

外文期刊名：ANNALS OF FOREST SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000429482800016)】；

基金：This work was financially supported by the Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2017SY018 and CAFYBB2017ZY003) and Guangdong Natural Science Foundation (2016A030310007).

语种：英文

外文关键词：Eucalyptus hybrid; Growth; Wood chemical property; Heritability; Genetic correlation; Type-B correlation

摘要：Key message Growth and wood chemical properties are important pulpwood traits. Their narrow-sense heritability ranged from 0.03 to 0.49 in Eucalyptus urophylla x E. tereticornis hybrids, indicating low to moderate levels of genetic control. Genetic correlations were mostly favorable for simultaneous improvement on growth and wood traits. Additive and non-additive genetic effects should be considered in making a hybrid breeding strategy. Context Eucalypt hybrids are widely planted for pulpwood production purposes. Genetic variations and correlations for growth and wood chemical traits remain to be explored in Eucalyptus interspecific hybrids. Aims Our objectives were to clarify the heritability of growth and wood chemical traits and determine the genetic correlations between traits and between trials in E. urophylla x E. tereticornis hybrids. Methods Two trials of 59 E. urophylla x E. tereticornis hybrids derived from an incomplete factorial mating design were investigated at age 10 for growth (height and diameter) and wood chemical properties (basic density, cellulose content, hemicellulose content, lignin content, and syringyl-to-guaiacyl ratio). Mixed linear models were used to estimate genetic parameters. Results Narrow-sense heritability estimates were 0.13-0.22 in growth and 0.03-0.49 in wood traits, indicating low to moderate levels of additive genetic control. Genetic correlations were mostly positively significant for growth with basic density and cellulose content but negatively significant with hemi-cellulose and lignin contents, being favourablefavorable for pulpwood breeding purpose. Type-B correlations between sites were significant for all the traits except diameter and lignin content. Conclusion Hybrid superiority warrants the breeding efforts. An appropriate breeding strategy should be able to capture both additive and non-additive genetic effects.