Broad-and narrow-sense heritabilities in a South African cloned open-pollinated Eucalyptus grandis breeding population

被引：6

作者：

Snedden, C. L. ^{[1
]}

Roux, C. Z. ^{[2
]}

Verryn, S. D. ^{[1
]}

机构：

[1] CSIR, ZA-0001 Pretoria, South Africa

[2] Univ Pretoria, Dept Genet, ZA-0002 Pretoria, South Africa

来源：

SOUTHERN HEMISPHERE FORESTRY JOURNAL | 2007年 / 69卷 / 02期

关键词：

additive genetic variation; broad-sense heritability; cloned breeding population; Eucalyptus grandis; narrow-sense heritability; non-additive genetic variation;

D O I：

10.2989/SHFJ.2007.69.2.2.288

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Genetic variances and heritabilities of a 66-month old cloned Eucalyptus grandis breeding population of families, derived from open-pollinated selections, were estimated. The genetic variance for the growth traits was largely additive genetic variance, whereas the proportion of non-additive genetic variance was notably higher for stem form and disease tolerance. A notably larger proportion of non-additive variance was observed for the growth traits and stem form among the F, families. This is probably due to the reduction in additive variance through selection for general combining ability for these traits in the previous generations. No selection for disease took place in earlier generations and the proportion of non-additive genetic variance for this trait remains approximately the same for families of different generations.

引用

页码：81 / 90

页数：10