Evidence for widespread cryptic sexual generations in apparently purely asexual Andricus gallwasps

Graham N. Stone, Rachel J. Atkinson, Antonis Rokas, José Luis Nieves-Aldrey, G. Melika, Zoltan Ács, G. Csóka, Alexander Hayward, Richard Bailey, Caroline Buckee, Gilean A T McVean

Research output: Article

35 Citations (Scopus)

Abstract

Oak gallwasps (Hymenoptera, Cynipidae, Cynipini) are one of seven major animal taxa that commonly reproduce by cyclical parthenogenesis (CP). A major question in research on CP taxa is the frequency with which lineages lose their sexual generations, and diversify as purely asexual radiations. Most oak gallwasp species are only known from an asexual generation, and secondary loss of sex has been conclusively demonstrated in several species, particularly members of the holarctic genus Andricus. This raises the possibility of widespread secondary loss of sex in the Cynipini, and of diversification within purely parthenogenetic lineages. We use two approaches based on analyses of allele frequency data to test for cryptic sexual generations in eight apparently asexual European species distributed through a major western palaearctic lineage of the gallwasp genus Andricus. All species showing adequate levels of polymorphism (7/8) showed signatures of sex compatible with cyclical parthenogenesis. We also use DNA sequence data to test the hypothesis that ignorance of these sexual generations (despite extensive study on this group) results from failure to discriminate among known but morphologically indistinguishable sexual generations. This hypothesis is supported: 35 sequences attributed by leading cynipid taxonomists to a single sexual adult morphospecies, Andricus burgundus, were found to represent the sexual generations of at least six Andricus species. We confirm cryptic sexual generations in a total of 11 Andricus species, suggesting that secondary loss of sex is rare in Andricus.

Original languageEnglish
Pages (from-to)652-665
Number of pages14
JournalMolecular Ecology
Volume17
Issue number2
DOIs
Publication statusPublished - jan. 2008

Fingerprint

Andricus
Parthenogenesis
parthenogenesis
gender
DNA sequences
Polymorphism
Hymenoptera
Quercus
Animals
Gene Frequency
Cynipidae
Radiation
gene frequency
allele
polymorphism
testing
Research
genetic polymorphism
nucleotide sequences
DNA

ASJC Scopus subject areas

  • Ecology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry

Cite this

Stone, G. N., Atkinson, R. J., Rokas, A., Nieves-Aldrey, J. L., Melika, G., Ács, Z., ... McVean, G. A. T. (2008). Evidence for widespread cryptic sexual generations in apparently purely asexual Andricus gallwasps. Molecular Ecology, 17(2), 652-665. https://doi.org/10.1111/j.1365-294X.2007.03573.x

Evidence for widespread cryptic sexual generations in apparently purely asexual Andricus gallwasps. / Stone, Graham N.; Atkinson, Rachel J.; Rokas, Antonis; Nieves-Aldrey, José Luis; Melika, G.; Ács, Zoltan; Csóka, G.; Hayward, Alexander; Bailey, Richard; Buckee, Caroline; McVean, Gilean A T.

In: Molecular Ecology, Vol. 17, No. 2, 01.2008, p. 652-665.

Research output: Article

Stone, GN, Atkinson, RJ, Rokas, A, Nieves-Aldrey, JL, Melika, G, Ács, Z, Csóka, G, Hayward, A, Bailey, R, Buckee, C & McVean, GAT 2008, 'Evidence for widespread cryptic sexual generations in apparently purely asexual Andricus gallwasps', Molecular Ecology, vol. 17, no. 2, pp. 652-665. https://doi.org/10.1111/j.1365-294X.2007.03573.x
Stone, Graham N. ; Atkinson, Rachel J. ; Rokas, Antonis ; Nieves-Aldrey, José Luis ; Melika, G. ; Ács, Zoltan ; Csóka, G. ; Hayward, Alexander ; Bailey, Richard ; Buckee, Caroline ; McVean, Gilean A T. / Evidence for widespread cryptic sexual generations in apparently purely asexual Andricus gallwasps. In: Molecular Ecology. 2008 ; Vol. 17, No. 2. pp. 652-665.
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AU - Atkinson, Rachel J.

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AU - Nieves-Aldrey, José Luis

AU - Melika, G.

AU - Ács, Zoltan

AU - Csóka, G.

AU - Hayward, Alexander

AU - Bailey, Richard

AU - Buckee, Caroline

AU - McVean, Gilean A T

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