Evolution and conservation of Characidium sex chromosomes.

ABSTRACT: Fish species exhibit substantial variation in the degree of genetic differentiation between sex chromosome pairs, and therefore offer the opportunity to study the full range of sex chromosome evolution. We used restriction-site associated DNA sequencing (RAD-seq) to study the sex chromosomes of Characidium gomesi, a species with conspicuous heteromorphic ZW/ZZ sex chromosomes. We screened 9863 single-nucleotide polymorphisms (SNPs), corresponding to ~1 marker/100 kb distributed across the genome for sex-linked variation. With this data set, we identified 26 female-specific RAD loci, putatively located on the W chromosome, as well as 148 sex-associated SNPs showing significant differentiation (average F_ST=0.144) between males and females, and therefore in regions of more recent d

SUBMITTER: Utsunomia R 

PROVIDER: S-EPMC5597785 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature