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Genetic variation, disequilibrium and natural selection on reproductive traits in Allium vineale

Författare

Summary, in English

Bulbils and seeds collected from Allium vineale plants from natural populations were grown under uniform conditions. The bulbil-derived offspring represented the parental generation, whereas the seed-derived offspring represented the sexually produced offspring generation. Molecular markers were used to identify maternal genets. Variation in traits determining the allocation to sexual and asexual reproduction was partitioned among genets and ramet families in the parental and offspring generations. From observations of a release of genetic variation and slippage in the mean phenotype in the offspring generation, we inferred that there exists extensive genetic disequilibrium for reproductive traits in A. vineale populations, that most of the genetic variance is because of dominance effects, and that natural selection favours a reduced allocation to sexual reproduction. No genetic correlation between sexual and asexual allocation traits was found. We discuss the implications of these results with respect to the evolution of a mixed reproductive system in A. vineale.

Avdelning/ar

Publiceringsår

2004

Språk

Engelska

Sidor

302-311

Publikation/Tidskrift/Serie

Journal of evolutionary biology

Volym

17

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley & Sons Inc.

Ämne

  • Biological Sciences

Nyckelord

  • clonal plants
  • Allium vineale
  • disequilibrium
  • quantitative genetics
  • natural selection
  • sexual reproduction

Status

Published

Forskningsgrupp

  • Evolutionary Genetics

ISBN/ISSN/Övrigt

  • ISSN: 1420-9101