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Ménage à trois : two endemic species of deceptive orchids and one pollinator species

Title data

Gögler, Julia ; Stökl, Johannes ; Sramkova, Anna ; Twele, Robert ; Francke, Wittko ; Cozzolino, Salvatore ; Cortis, Pierluigi ; Scrugli, Antonio ; Ayasse, Manfred:
Ménage à trois : two endemic species of deceptive orchids and one pollinator species.
In: Evolution. Vol. 63 (2009) Issue 9 . - pp. 2222-2234.
ISSN 1558-5646
DOI: https://doi.org/10.1111/j.1558-5646.2009.00712.x

Abstract in another language

In the sexually deceptive orchid genus Ophrys, reproductive isolation is based on the specific attraction of males of a single pollinator species by mimicking the female species‐specific sex pheromone. Changes in the odor composition can lead to hybridization and speciation by the attraction of a new pollinator that acts as an isolation barrier toward other sympatrically occurring Ophrys species. On Sardinia, we investigated the evolutionary origin of two sympatrically occurring endemic species, Ophrys chestermanii and O. normanii, which are both pollinated by males of the cuckoo bumblebee Bombus vestalis. Chemical and electrophysiological analyses of floral scent and genetic analyses with amplified fragment length polymorphisms and plastid‐markers clearly showed that O. normanii is neither a hybrid nor a hybrid species. The two species evolved from different ancestors, viz. O. normanii from O. tenthredinifera and O. chestermanii from O. annae, and converged to the same pollinator attracted by the same bouquet of polar compounds. In spite of sympatry, pollinator sharing and overlapping blooming periods, no evidence has been obtained for gene flow between O. chestermanii and O. normanii indicating an unusual case among sexually deceptive orchids in which postmating rather than premating reproductive isolation mechanisms strongly prevent interspecific gene flow.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER147400
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology > Chair Animal Ecology II - Evolutionary Animal Ecology - Univ.-Prof. Dr. Sandra Steiger
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 15 Apr 2019 12:13
Last Modified: 15 Apr 2019 12:13
URI: https://eref.uni-bayreuth.de/id/eprint/48399