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Origin and timing of the horizontal transfer of a PgiC gene from Poa to Festuca ovina.

Författare:
Publiceringsår: 2008
Språk: Engelska
Sidor: 890-896
Publikation/Tidskrift/Serie: Molecular Phylogenetics and Evolution
Volym: 46
Dokumenttyp: Artikel
Förlag: Elsevier Inc
Additional info: Article in Press, Corrected Proof

Sammanfattning

A segregating second locus, PgiC2, for the enzyme phosphoglucose isomerase (PGIC) is found in the grass sheep's fescue, Festuca ovina. We have earlier reported that a phylogenetic analysis indicates that PgiC2 has been horizontally transferred from the reproductively separated grass genus Poa. Here we extend our analysis to include intron and exon information on 27 PgiC sequences from 18 species representing five genera, and confirm our earlier finding. The origin of PgiC2 can be traced to a group of closely interrelated, polyploid and partially asexual Poa species. The sequence most similar to PgiC2 is found in Poa palustris with a divergence, based on synonymous substitutions, of only 0.67%. This value suggests that the transfer took place less than 600,000years ago (late Pleistocene), at a time when most extant Poa and Festuca species already existed.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • Evolutionary Genetics
  • ISSN: 1055-7903

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