ArrayExpress

Released on 27 June 2016, last updated on 28 December 2016

Astyanax mexicanus, Hyphessobrycon anisitsi

We found higher substitution rates in cavefish compared with surface fish, in accordance with a smaller cavefish population size which has allowed more rapid fixation of derived alleles present in the ancestral population. This result also implies that the Pachn cave population is much younger than previously estimated. The comparison of these data with simulations suggests that the Pachn cavefish population has probably been underground less than 30,000 years. This new time frame, together with other evidence, indicate that the evolution of cave phenotypes mainly involves the fixation of cryptic genetic variants present in surface fish populations within a short period of time.

RNA-seq of coding RNA, genotype design, genotyping design, organism part comparison design, replicate design, strain or line design

Didier Casane <didier.casane@egce.cnrs-gif.fr>, Sylvie Retaux <sylvie.retaux@inaf.cnrs-gif.fr>

Evidence of Late Pleistocene origin of Astyanax mexicanus cavefish. Julien Fumey, Hlne Hinaux, Cline Noirot, Sylvie Rtaux and Didier Casane.