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The introgression of a functional nuclear gene from Poa to Festuca ovina

Författare:
Publiceringsår: 2006
Språk: Engelska
Sidor: 395-399
Publikation/Tidskrift/Serie: Proceedings of the Royal Society B: Biological Sciences
Volym: 273
Nummer: 1585
Dokumenttyp: Artikel
Förlag: Royal Society

Sammanfattning

In sheep's fescue, Festuca ovina, genes coding for the cytosolic enzyme phosphoglucose isomerase, PGIC, are not only found at the standard locus, PgiC1, but also at a segregating second locus, PgiC2. We have used PCR-based sequencing to characterize the molecular structure and evolution of five PgiC1 and three PgiC2 alleles in F. ovina. The three PgiC2 alleles were complex in that they carried two gene copies: either two active genes or one active and one pseudogene. All the PgiC2 sequences were very similar to each other but highly diverged from the five PgiC1 sequences. We also sequenced PgiC genes from several other grass species. Phylogenetic analysis of these sequences indicates that PgiC2 has introgressed into F. ovina from the distant genus Poa. Such an introgression may, for example, follow from a non-standard fertilization with more than one pollen grain, or a direct horizontal gene transfer mediated by a plant virus.

Disputation

Nyckelord

  • Biology and Life Sciences
  • horizontal gene
  • transfer
  • introgression
  • Festuca ovina
  • Pgi
  • gene duplication

Övrigt

Published
Yes
  • Evolutionary Genetics
  • ISSN: 0962-8452

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