Author:
Hopper SD,Coates DJ,Burbidge AH
Abstract
The suspected occurrence of natural hybridization between Eucalyptus preissiana Schau, and E.
Buprestium F. Muell, near West Mount Barren was investigated through a study of morphometric
and reproductive parameters in allopatric and sympatric populations of these species. While E.
Preissiana and E. buprestium were morphometrically distinct in allopatry, a small number of intermediate individuals occurred in one of the two sympatric populations examined. These intermediates
set less fruit per plant than the parental species on average, a fact consistent with the hypothesis
that they were hybrids showing partial F2 breakdown. The demonstration that New Holland
honeyeaters (Phylidonyris novae-hollandiae) carried pollen of both parental species in a sympatric
population was interpreted as further evidence in support of the occurrence of hybridization.
The possible hybrid status of E. chrysantha Blakely & Steedman was investigated through determining its morphometric relationships in a multivariate analysis of E. sepulcralis F. Muell., E.
Preissiana and E. buprestium. E. chrysantha was intermediate between E. sepulcralis and E. preissiana,
and distinguishable from E. preissiana-E. buprestium hybrids in this analysis.
The taxonomic and evolutionary implications of the study are discussed.
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics
Cited by
21 articles.
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