title: Differences in evolution rates among eudicotyledon species observed by analysis of protein divergence.
abstract: Genome evolution rates can vary considerably among plants. In particular, a correlation has often been reported between the evolution rate and annual/perennial habit, possibly associated with differences in generation time. For example, among the rosid species whose genome is fully sequenced, Vitis vinifera, a perennial species, was shown to have the genome that evolved the slowest. In order to extend knowledge of evolution rates to the asterid clade, one of the two major clades of core eudicotyledonous, the protein evolution rates in three asterid species, one perennial (Coffea canephora) and two annual species (Solanum lycopersicum and Mimulus guttatus), were investigated and compared with V. vinifera. Significant differences were observed among these species, and the proteins that evolved the most slowly were those of V. vinifera. Among the species belonging to the asterid clade, C. canephora appears to have evolved more slowly than the others. These findings are consistent with a correlation between perennial habit and slow evolution rates. The C. canephora genome seems to be an appropriate model for paleogenomic studies of asterids.
authors.affiliation: UMR RPB (CIRAD, IRD, Université Montpellier II), IRD—Institut de Recherche pour le Développement, BP 64501, 34394 Montpellier Cedex 5, France.
authors.forename: Alberto
authors.initials: A
authors.lastname: Cenci
authors.forename: Marie-Christine
authors.initials: MC
authors.lastname: Combes
authors.forename: Philippe
authors.initials: P
authors.lastname: Lashermes
mesh_terms: D040503:Coffea / Q000235:genetics; D030562:Databases, Protein; D019143:Evolution, Molecular; D014644:Genetic Variation / Q000502:physiology*; D018745:Genome, Plant; D018551:Solanum lycopersicum / Q000235:genetics; D019684:Magnoliopsida / Q000235:genetics*; D032241:Mimulus / Q000235:genetics; D059645:Mutation Rate; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D017385:Sequence Homology; D013045:Species Specificity; D027843:Vitis / Q000235:genetics
chemical_list: D010940:Plant Proteins
keywords: asterids; coffea; comparative evolution; core eudicots; protein distances; rosids