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Abstract

Eucalyptus globulus has a mixed mating system and selfing
leads to severe inbreeding depression. Thus, outcrossing rate is
an important measure of seed quality in this species. Outcrossing
rates were estimated on the frequency of a rare recessive
chlorophyll deficient mutant in open pollinated seed. Variation
of outcrossing rates across different flowering seasons, seed
sizes and storage times was assessed in E. globulus seedlots.
Although there was a significant difference between the trees
studied, outcrossing rates within a tree were found to be stable
across four flowering seasons and three seed sizes. Storage
either on the tree or in the laboratory did not alter the outcrossing
rate in a consistent manner. The stability of outcrossing
rates with season of pollination, age and size of seed is
noteworthy as these factors may vary widely in multi-tree
seedlots used for plantation establishment.

Item Type:	Article
Authors/Creators:	McGowen, MH and Williams, DR and Potts, BM and Vaillancourt, RE
Journal or Publication Title:	Silvae Genetica
ISSN:	0037-5349
Additional Information:	BM Potts. Free online access to the archives of SILVAE GENETICA
Item Statistics:	View statistics for this item

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