The population genomics of repeated evolution in the blind cavefish Astyanax mexicanus.

ABSTRACT: Distinct populations of Astyanax mexicanus cavefish offer striking examples of repeatable convergence or parallelism in their independent evolutions from surface to cave phenotypes. However, the extent to which the repeatability of evolution occurred at the genetic level remains poorly understood. To address this, we first characterized the genetic diversity of 518 single-nucleotide polymorphisms (SNPs), obtained through RAD tag sequencing and distributed throughout the genome, in seven cave and three groups of surface populations. The cave populations represented two distinct lineages (old and new). Thirty-one SNPs were significantly differentiated between surface and old cave populations, two SNPs were differentiated between surface and new cave populations, and 44 SNPs were significantl

SUBMITTER: Bradic M 

PROVIDER: S-EPMC3808867 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature