Specific pollinator attraction and the diversification of sexually deceptive Chiloglottis (Orchidaceae)

J. Mant*, R. Peakall, P. H. Weston

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)

    Abstract

    Evidence indicates that sexually deceptive Chiloglottis R.Br. (Orchidaceae) taxa specifically attract their thynnine wasp (Tiphiidae) pollinators through the floral odour mimicry of female wasp sex pheromones. We use amplified fragment length polymorphisms (AFLPs) to reconstruct the species-level phylogeny of Chiloglottis, make a preliminary evaluation of genetic distinc-tions between species, and compare the historical association among orchids and their pollinators using wasp sequence data from a previous study. AFLPs show large differences between three subgeneric clades relative to that found among species within each clade. Interspecific genetic barriers are indicated by AFLP discontinuities among species unlike in previously reported DNA sequence data. However, such barriers are demonstrated clearly in only one of the two pairs of sympatric species sampled more intensively. We interpret these patterns as indicating either (i) a rapid and recent radiation of species within each clade following histories of stasis or extinction, or (ii) alternating cycles of divergence and gene flow acting to homogenize genetic differences among species within each of the three clades.

    Original languageEnglish
    Pages (from-to)185-200
    Number of pages16
    JournalPlant Systematics and Evolution
    Volume253
    Issue number1-4
    DOIs
    Publication statusPublished - Jun 2005

    Fingerprint

    Dive into the research topics of 'Specific pollinator attraction and the diversification of sexually deceptive Chiloglottis (Orchidaceae)'. Together they form a unique fingerprint.

    Cite this