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Evaluating population structure by neutral markers and quantitative genetic parameters in a thinned progeny trial of Eucalyptus urophylla

Citation

Quang, TH and Gyllenstrand, N and Jansson, G and Griffin, R and Von Arnold, S and Clapham, D, Evaluating population structure by neutral markers and quantitative genetic parameters in a thinned progeny trial of Eucalyptus urophylla, Journal of Tropical Forest Science, 25, (3) pp. 350-360. ISSN 0128-1283 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Forest Research Institute Malaysia

Official URL: http://www.frim.gov.my/?page_id=1826

Abstract

The aim of this study was to estimate from microsatellite variation the levels of homozygote excess within nine populations comprising a combined population and progeny trial of Eucalyptus urophylla in northern Vietnam and to compare the population differentiation estimated by molecular markers with that estimated from growth traits. The material was thinned in year 2 (removing 75% of the trees) and year 5 (removing 37% of the remaining trees). Microsatellite variation was measured after the second thinning. Homozygote excess (F IS) among populations ranged from 0.069 to 0.198. Most of the molecular variation was within populations (97.1% of the total variation), in agreement with the low FST value (0.023) of neutral molecular markers (F ST) (0.023). Estimates of quantitative trait differentiation (Q ST) based on a univariate model among populations for height and diameter at breast height were low over the first eight years of the trial, at most 0.21. This presumably reflected selection for the same traits in a common environment. The differences between QST after the second thinning and FST , a measure of the effects of selection, were also small. Prospects for further breeding progress are bright, whether or not crosses are made among populations.

Item Details

Item Type:Refereed Article
Keywords:Genetic variation, homozygote excess, microsatellite, quantitative variation
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Genetics not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Native Forests
Author:Griffin, R (Professor Rod Griffin)
ID Code:89988
Year Published:2013
Web of Science® Times Cited:2
Deposited By:Plant Science
Deposited On:2014-03-21
Last Modified:2014-06-04
Downloads:0

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