南京林业大学学报（自然科学版）2015，Vol.39Issue(5)：33-38,6.DOI:10.3969/j.issn.1000-2006.2015.05.006
尾叶桉×邓恩桉早期生长和耐寒性的遗传分析
Genetic analysis on early growth and cold tolerance of Eucalyptus urophylla × E. dunnii hybrids
摘要
Abstract
With the objective to clarify the genetic parameters of growth and cold tolerance in interspecific hybrids be?tween Eucalyptus urophylla S. T. Blake and E. dunnii Maiden, a factorial mating population of the two species was inves?tigated on 8?month?old cold tolerance ( C8 ) as well as 20?month?old growth traits height ( H20 ) and diameter at breast height ( D20 ) . For all the three traits measured, the variance components of E. urophylla female, E. dunnii male and fe?male×male interaction were not significant, in which the interaction was the main source for C8 while both the female and interaction effects contributed to growth ( H20 and D20 ) , with the female effect at a higher magnitude. Narrow?sense heri?tability ( h2 ) values of C8 , H20 and D20 were 0, 0.29 and 0.22, respectively, indicating little genetic control of cold tol?erance but moderate genetic control of growth. Except the significant phenotypic correlation (P<0.05) between H20 and D20 , all the rest phenotypic and additive genetic correlation coefficients were not significant among traits. Female general combining ability ( GCAF ) and general hybridizing ability ( GHAF ) were weakly correlated. In addition, female?parent heterosis values were calculated. It was concluded that the h2 values for all the traits were markedly small and selection of superior hybrids and individuals would be appropriate in breeding practices.关键词
尾叶桉/邓恩桉/耐寒性/早期生长/遗传参数/杂种优势Key words
Eucalyptus urophylla/E. dunnii/cold tolerance/early growth/genetic parameter/heterosis分类
农业科技引用本文复制引用
翁启杰,赖秋香,李发根,周长品,李建文,李梅,甘四明..尾叶桉×邓恩桉早期生长和耐寒性的遗传分析[J].南京林业大学学报（自然科学版）,2015,39(5):33-38,6.基金项目
国家高技术研究发展计划(2011AA100202) （2011AA100202）
