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
- Biologiska institutionen
- MEMEG
- Evolutionary Genetics
Publiceringsår
2004
Språk
Engelska
Sidor
302-311
Publikation/Tidskrift/Serie
Journal of evolutionary biology
Volym
17
Issue
2
Länkar
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