University Of Tasmania
genetic-variation-poots.pdf (183.38 kB)

Genetic variation and parental performance under inbreeding for growth in Eucalyptus globulus

Download (183.38 kB)
journal contribution
posted on 2023-05-17, 04:44 authored by Costa e Silva, J, Hardner, C, Bradley PottsBradley Potts
• We aimed to better understand the genetic architecture of growth in E. globulus undergoing inbreeding by comparing families from selfing (SELF), open pollination (OP) and unrelated polymix crossing (POL) of common parents. Stem diameter at breast height (DBH) was assessed at 4, 6 and 10 years after planting in a field trial. • The OP heritability was overestimated at an early age relative to the POL heritability. • No significant correlations were found between the SELF and POL parental effects, indicating substantial non-additive genetic variation under inbreeding. The OP family effects were better correlated with the SELF than the POL population, and only at age 10 years, after substantial mortality of inbred progeny has occurred, was the positive correlation between OP and POL families significantly different from zero. • The estimated dominance variance arising from inbreeding was nearly 10-fold greater than the dominance variance associated with random mating and the additive variance, and appeared to be a major contributor to the variation in inbreeding depression amongst selfed families.


Publication title

Annals of Forest Science










School of Natural Sciences


E D P Sciences

Place of publication

7, Ave Du Hoggar, Parc D Activites Courtaboeuf, Bp 112, Les Ulis Cedexa, France, F-91944

Rights statement

Copyright © EDP Sciences, 2010

Repository Status

  • Open

Socio-economic Objectives

Hardwood plantations