文献类型：期刊文献

英文题名：Quantitative genetics of cold hardiness and growth in Eucalyptus as estimated from E. urophylla x E. tereticornis hybrids

作者：He, Xudong[1,2,3] Li, Fagen[1,2] Li, Mei[1,2] Weng, Qijie[1,2] Shi, Jisen[3] Mo, Xiaoyong[4] Gan, Siming[1,2]

第一作者：He, Xudong

通信作者：Gan, SM[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Chinese Acad Forestry, Natl Key Lab Forest Tree Genet & Breeding, Guangzhou 510520, Guangdong, Peoples R China;[3]Nanjing Forestry Univ, Key Lab Forest Genet & Biotechnol, Minist Educ, Nanjing 210037, Peoples R China;[4]S China Agr Univ, Coll Forestry, Guangzhou 510642, Guangdong, Peoples R China

年份：2012

卷号：43

期号：3

起止页码：383-394

外文期刊名：NEW FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000303392200008)】；

基金：This work was financially supported by grants from National Program of High Technology Development of China (2011AA100202), and the Ministry of Finance of China through a specific program for national non-profit scientific institutions (RITFKYYW2010-04). The authors thank Kunming Wu and Juying Wu for kind assistance in control pollination and seedling raising as well as Jianwen Li, Shuzhong Li and Wenge Lin for valuable cooperation in field trial establishment and maintenance. Zhaoyuan Zhang and Yong Guo helped with field investigations. Special thanks are also due to Roger Arnold and anonymous reviewers for their valuable comments on the manuscript.

语种：英文

外文关键词：Genetic parameters; Cold hardiness; Growth; Eucalyptus

摘要：Interspecific hybrids of Eucalyptus urophylla S. T. Blake x E. tereticornis Smith were used for quantitative genetic analysis of cold hardiness (CH) and growth traits height (H), diameter at breast height (D) and volume (V) at 0.5, 1.5, 2.5 and 4 years of age. The effect of E. tereticornis male variance was significant (P < 0.05) for CH as well as 2.5- and 4-year-old growth except for H (4), and E. urophylla female x E. tereticornis male interaction was significant for 0.5- and 1.5-year-old growth and CH except for CH (0.5), whereas E. urophylla female effect was not significant for the majority of traits analyzed. Both additive and dominance gene action were present in the genetics of all the traits measured at most ages, indicating that those traits may be improved by hybrid breeding. The sigma (D) (2) /sigma (A) (2) ratios tended to decline after 1.5 years of age in CH and growth traits, implying that breeding value predictions derived from older performance might be more reliable. Estimates of narrow-sense heritability (h (2) ) for CH and growth ranged from 0.03 +/- A 0.05 to 0.28 +/- A 0.13, depending on trait and age. Additive genetic correlations between CH and V were 0.28 +/- A 0.48 and 0.69 +/- A 0.30 at ages 1.5 and 2.5, respectively, suggesting that selection for growth would cause a favorable increase in cold hardiness in E. urophylla x E. tereticornis hybrids.