文献类型：期刊文献

英文题名：Genetic parameters for growth and wood mechanical properties in Eucalyptus cloeziana F. Muell.

作者：Li, Changrong[1,2,3,4] Weng, Qijie[2] Chen, Jian-Bo[3,4] Li, Mei[2] Zhou, Changpin[2] Chen, Shengkan[2] Zhou, Wei[3,4] Guo, Dongqiang[3,4] Lu, Cuixiang[3,4] Chen, Jian-Cheng[5] Xiang, Dongyun[3,4] Gan, Siming[1,2]

第一作者：Li, Changrong

通信作者：Gan, SM[1];Gan, SM[2];Xiang, DY[3];Xiang, DY[4]

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;[3]Guangxi Forestry Res Inst, Key Lab State Forestry Adm Cent South Fast Growin, 23 Yongwu Rd, Nanning 530002, Peoples R China;[4]Guangxi Forestry Res Inst, Guangxi Key Lab Super Timber Trees Resource Culti, 23 Yongwu Rd, Nanning 530002, Peoples R China;[5]Yulin Forestry Res Inst, Rongxi Town 537501, Rongxian, Peoples R China

年份：2017

卷号：48

期号：1

起止页码：33-49

外文期刊名：NEW FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000394036200003)】；

基金：This work was financially supported by grants from Guangxi Department of Forestry (2014-4, 2014-35 & 2015-6) and Key Laboratory of State Forestry Administration on Central South Fast-growing Timber Cultivation (14-A-01-01). The authors thank Guicheng Yu, Jun Wu, Jianfan Li, Yaomei Bin, Shidong Chen, Lu Li, Guanglan Huang and Xi Sun from Yulin Forestry Research Institute for kind assistance in field trial establishment, maintenance and investigation as well as wood sample collection. Thanks are also due to Jiachun Lin and Zhaoyuan Zhang from Guangxi Forestry Research Institute for valuable cooperation in field trial investigation, wood sample collection and standard measurement. We are grateful to John Turnbull for regional grouping of the provenances, Kevin Harding for critical reading of an earlier version of the manuscript and the two anonymous reviewers for helpful comments and suggestions.

语种：英文

外文关键词：Heritability; Genetic correlation; Wood mechanical property; Growth; Eucalyptus cloeziana

摘要：Genetic parameters for wood mechanical properties and their correlations with growth traits are not well established in the important tree genus Eucalyptus L'H,r. Based on a progeny trial of 115 open-pollinated families of Eucalyptus cloeziana F. Muell., this study estimated the heritability and trait-trait correlations for growth, including height (H), diameter at breast height (D) and volume (V), and wood mechanical traits, including basic density (BD), green density (GD), modulus of elasticity (MOE), modulus of rupture (MOR) and parallel-to-grain compressive strength (sigma c). Narrow-sense heritability (h (i) (2) ) ranged from 0.04 to 0.35 for growth across ages 0.5-9.5 years and from 0.06 to 0.24 for wood mechanical properties at age 9.5, indicating low to moderate magnitude of additive genetic control of these traits. Phenotypic (r (p) ) and additive genetic (r (g) ) correlations at the final age of 9.5 years were consistently significantly positive between growth traits and mostly significantly positive between wood mechanical traits, while r (p) and r (g) were small and adversely significant, respectively, between the two types of traits, posing a challenge for concomitant improvement of growth and wood traits. In addition, r (p) and r (g) coefficients between age 9.5 and earlier years for each of the growth traits H, D and V were all positively significant (except for H (2.5)) and had a generally increasing trend with age, suggesting the possibility of early selection.