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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
URI: http://eprints.utas.edu.au/id/eprint/3402
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