Turnover and accumulation of genetic diversity across large time-scale cycles of isolation and connection of populations.


Autoria(s): Alcala N.; Vuilleumier S.
Data(s)

2014

Resumo

Major climatic and geological events but also population history (secondary contacts) have generated cycles of population isolation and connection of long and short periods. Recent empirical and theoretical studies suggest that fast evolutionary processes might be triggered by such events, as commonly illustrated in ecology by the adaptive radiation of cichlid fishes (isolation and reconnection of lakes and watersheds) and in epidemiology by the fast adaptation of the influenza virus (isolation and reconnection in hosts). We test whether cyclic population isolation and connection provide the raw material (standing genetic variation) for species evolution and diversification. Our analytical results demonstrate that population isolation and connection can provide, to populations, a high excess of genetic diversity compared with what is expected at equilibrium. This excess is either cyclic (high allele turnover) or cumulates with time depending on the duration of the isolation and the connection periods and the mutation rate. We show that diversification rates of animal clades are associated with specific periods of climatic cycles in the Quaternary. We finally discuss the importance of our results for macroevolutionary patterns and for the inference of population history from genomic data.

Identificador

http://serval.unil.ch/?id=serval:BIB_45120AFA6DBE

isbn:1471-2954 (Electronic)

pmid:25253456

doi:10.1098/rspb.2014.1369

isiid:000351512500006

Idioma(s)

en

Fonte

Proceedings of the Royal Society B Biological Sciences, vol. 281, no. 1794, pp. 20141369

Palavras-Chave #migration; population subdivision; secondary contact; diversification
Tipo

info:eu-repo/semantics/article

article