Limitations to Reproductive Output and Genetic Rescue in Populations of the Rare Shrub Grevillea repens (Proteaceae)
GD Holmes, EA James, AA Hoffmann
ANNALS OF BOTANY | OXFORD UNIV PRESS | Published : 2008
BACKGROUND AND AIMS: When conserving rare plant species, managers are often faced with small and/or isolated populations displaying low levels of sexual reproduction and genetic variation. One option for reinvigorating these populations is the introduction of genetic material from other sites, but in some cases fitness may be reduced as a result of outbreeding depression. Here the pollination biology of the rare shrub Grevillea repens is studied across its natural range and reproductive responses following cross-pollination among populations are examined to determine factors that may be limiting sexual reproduction and the potential for genetic rescue. METHODS: Pollen manipulation treatments..View full abstract
We thank the staff from Parks Victoria and DSE for allowing access to sites, Caroline Gross for advice on pollen viability testing, Adrian and Penelope Holmes for fieldwork assistance, and Susan Hoebee and two anonymous reviewers for providing constructive comments on the manuscript. This work was supported by the Cybec Foundation; Royal Botanic Gardens Melbourne; and the Centre for Environmental Stress and Adaptation Research. A. A. H. was supported by a Federation Fellowship from the Australian Research Council. Research was undertaken under Department of Sustainability and Environment permits 10003055 and 05/1/09/11/06.