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Stand density influences outcrossing rate and growth of ppen-pollinated families of Eucalyptus globulus

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Hardner, CM and Vaillancourt, RE and Potts, BM (1996) Stand density influences outcrossing rate and growth of ppen-pollinated families of Eucalyptus globulus. Silvae Genetica, 45 (4). ISSN 0037-5349

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Abstract

Using isozymes markers, we test BORRALHO and POTTS’
(1996) hypothesis that poorer growth of open-pollinated (OP)
families of Eucalyptus globulus grown from seed collected from
less dense stands is a consequence of lower outcrossing rates. A
significant relationship between stand density class and outcrossing
rate was found, with outcrossing rates near one for
families from closed forests. In support of BORRALHO and POTTS’
(1996) hypothesis, lower parental breeding values were
generally associated with lower outcrossing rates. This is no
doubt due to a higher proportion of less vigorous selfs within
an OP family depressing mean growth relative to families
where inbred progeny were virtually absent. It is suggested
that the precision of predicting breeding values with OP
progenies may be improved by adjusting family performance
for individual outcrossing rate.

Item Type: Article
Keywords: Inbreeding depression, breeding values, selfing rate, mating system.
Journal or Publication Title: Silvae Genetica
ISSN: 0037-5349
Additional Information:

BM Potts. Free online access to the archives of SILVAE GENETICA

Date Deposited: 05 Mar 2008 04:23
Last Modified: 18 Nov 2014 03:31
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