title: Evolutionary rates and species diversity in flowering plants.
abstract: Genetic change is a necessary component of speciation, but the relationship between rates of speciation and molecular evolution remains unclear. We use recent phylogenetic data to demonstrate a positive relationship between species numbers and the rate of neutral molecular evolution in flowering plants (in both plastid and nuclear genes). Rates of protein and morphological evolution also correlate with the neutral substitution rate, but not with species numbers. Our findings reveal a link between the rate of neutral molecular change within populations and the evolution of species diversity.
authors.affiliation: Department of Biology and NERC Centre for Population Biology, Imperial College at Silwood Park, Ascot, Berkshire, United Kingdom. t.barraclough@ic.ac.uk
authors.forename: T G
authors.initials: TG
authors.lastname: Barraclough
authors.forename: V
authors.initials: V
authors.lastname: Savolainen
mesh_terms: D018744:DNA, Plant / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D019143:Evolution, Molecular; D019684:Magnoliopsida / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics; D012044:Regression Analysis; D012273:Ribulose-Bisphosphate Carboxylase; D013045:Species Specificity
chemical_list: D018744:DNA, Plant; D004275:DNA, Ribosomal; D010940:Plant Proteins; C101625:RbcL protein, plastid; D012273:Ribulose-Bisphosphate Carboxylase