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

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Author

Summary, in English

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.

Department/s

Publishing year

2006

Language

English

Pages

395-399

Publication/Series

Royal Society of London. Proceedings B. Biological Sciences

Volume

273

Issue

1585

Document type

Journal article

Publisher

Royal Society Publishing

Topic

  • Biological Sciences

Keywords

  • horizontal gene
  • transfer
  • introgression
  • Festuca ovina
  • Pgi
  • gene duplication

Status

Published

Research group

  • Evolutionary Genetics

ISBN/ISSN/Other

  • ISSN: 1471-2954