Mutation rate is linked to diversification in birds.

Abstract:

:How does genome evolution affect the rate of diversification of biological lineages? Recent studies have suggested that the overall rate of genome evolution is correlated with the rate of diversification. If true, this claim has important consequences for understanding the process of diversification, and implications for the use of DNA sequence data to reconstruct evolutionary history. However, the generality and cause of this relationship have not been established. Here, we test the relationship between the rate of molecular evolution and net diversification with a 19-gene, 17-kb DNA sequence dataset from 64 families of birds. We show that rates of molecular evolution are positively correlated to net diversification in birds. Using a 7.6-kb dataset of protein-coding DNA, we show that the synonymous substitution rate, and therefore the mutation rate, is correlated to net diversification. Further analysis shows that the link between mutation rates and net diversification is unlikely to be the indirect result of correlations with life-history variables that may influence both quantities, suggesting that there might be a causal link between mutation rates and net diversification.

authors

Lanfear R,Ho SY,Love D,Bromham L

doi

10.1073/pnas.1007888107

subject

Has Abstract

pub_date

2010-11-23 00:00:00

pages

20423-8

issue

47

eissn

0027-8424

issn

1091-6490

pii

1007888107

journal_volume

107

pub_type

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