Shared and Species-Specific Patterns of Nascent Y Chromosome Evolution in Two Guppy Species.

ABSTRACT: Sex chromosomes form once recombination is halted around the sex-determining locus between a homologous pair of chromosomes, resulting in a male-limited Y chromosome. We recently characterized the nascent sex chromosome system in the Trinidadian guppy (Poeciliareticulata). The guppy Y is one of the youngest animal sex chromosomes yet identified, and therefore offers a unique window into the early evolutionary forces shaping sex chromosome formation, particularly the rate of accumulation of repetitive elements and Y-specific sequence. We used comparisons between male and female genomes in P. reticulata and its sister species, Endler’s guppy (P. wingei), which share an ancestral sex chromosome, to identify male-specific sequences and to characterize the degr

SUBMITTER: Morris J 

PROVIDER: S-EPMC5977178 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature