Cryptic species of fig-pollinating wasps: implications for the evolution of the fig-wasp mutualism, sex allocation, and precision of adaptation

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Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Cryptic species of fig-pollinating wasps: implications for the evolution of the fig-wasp mutualism, sex allocation, and precision of adaptation
Journal
Proceedings of the National Academy of Sciences of the United States of America
Author(s)
Molbo  D., Machado  C. A., Sevenster  J. G., Keller  L., Herre  E. A.
ISSN
0027-8424
Publication state
Published
Issued date
05/2003
Peer-reviewed
Oui
Volume
100
Number
10
Pages
5867-72
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: May 13
Abstract
Fig-pollinating wasps have provided model systems for developing and testing theories of the evolution of mutualism, sex allocation, and precision of adaptation. With few exceptions, previous studies have assumed one species of pollinator wasp per host fig species. Here we report genetic data demonstrating the coexistence of previously undetected cryptic fig wasp species in at least half of the host fig species surveyed. The substantial mitochondrial sequence differences (4.2-6.1%) imply old divergences ( approximately 1.5-5.1 million years ago) among these species. Furthermore, some cryptic species pairs seem to be sister taxa, whereas others clearly are not, indicating both long-term coexistence on shared hosts and the colonization of novel fig species. These findings undermine the prevalent notion of strict one-to-one specificity between cospeciating figs and their pollinators, thereby challenging existing theory concerning the evolution and stability of mutualisms. Moreover, the incorporation of the genetic information significantly improves the fit of the observed sex ratios to predictions of local mate-competition theory, further strengthening support for sex allocation theory and the precision of adaptation.
Keywords
Animals DNA, Mitochondrial/genetics Fruit/*physiology Microsatellite Repeats Molecular Sequence Data Phylogeny Pollen/*physiology Reproduction Sex Determination (Genetics) Variation (Genetics) Wasps/classification/genetics/*physiology
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 18:39
Last modification date
20/08/2019 14:20
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