NDLI: The importance and type of non-additive genetic effects for growth in Eucalyptus globulus

Content Provider	Springer Nature Link
Author	Araújo, José A. Borralho, Nu M. G. Dehon, Gabriel
Copyright Year	2011
Abstract	The paper investigates the importance of additive and non-additive genetic variances for growth in Eucalyptus globulus (Tasmanian Blue Gum), based on a large collection of diameter growth data covering 40 sites and more than 4,200 genotypes, most of them cloned, and spanning three generations of breeding. The variance estimates were based on a model accounting for additive, full-sib family and clone within full-sib family terms. The results indicated a small amount of additive genetic variance for diameter $$ \left( {{{\widehat{h}}^2} = 0.10} \right) $$ and although non-additive genetic variance was also small, it accounted for a significant proportion of the total genetic variance present, corresponding to 80% of the additive variance. The interpretation of these non-additive effects is difficult. The results suggest, however, a possible role of epistasis. The evidence for this came from a strong observed bias in additive variance when clone effects were removed from the model and a larger than expected variance due to full-sib families relative to the variance due to clones within family. The relatively large proportion of genetic variance for growth that seems to be due to non-additive genetic effects has obvious implications in the breeding and deployment options in eucalypts, and these are briefly discussed.
Starting Page	327
Ending Page	337
Page Count	11
File Format	PDF
ISSN	16142942
Journal	Tree Genetics & Genomes
Volume Number	8
Issue Number	2
e-ISSN	16142950
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-11-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Eucalyptus Genetic variance Tree improvement Plant Genetics & Genomics Plant Breeding/Biotechnology Tree Biology Biotechnology Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Horticulture Forestry

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