Estimation of the spontaneous mutation rate in Heliconius melpomene.
Mol Biol Evol
; 32(1): 239-43, 2015 Jan.
Article
em En
| MEDLINE
| ID: mdl-25371432
ABSTRACT
We estimated the spontaneous mutation rate in Heliconius melpomene by genome sequencing of a pair of parents and 30 of their offspring, based on the ratio of number of de novo heterozygotes to the number of callable site-individuals. We detected nine new mutations, each one affecting a single site in a single offspring. This yields an estimated mutation rate of 2.9 × 10(-9) (95% confidence interval, 1.3 × 10(-9)-5.5 × 10(-9)), which is similar to recent estimates in Drosophila melanogaster, the only other insect species in which the mutation rate has been directly estimated. We infer that recent effective population size of H. melpomene is about 2 million, a substantially lower value than its census size, suggesting a role for natural selection reducing diversity. We estimate that H. melpomene diverged from its Müllerian comimic H. erato about 6 Ma, a somewhat later date than estimates based on a local molecular clock.
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Base de dados:
MEDLINE
Assunto principal:
Borboletas
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Análise de Sequência de DNA
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Genoma de Inseto
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Taxa de Mutação
Limite:
Animals
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article