Recent Sex Chromosome Divergence despite Ancient Dioecy in the Willow Salix viminalis.

ABSTRACT: Sex chromosomes can evolve when recombination is halted between a pair of chromosomes, and this can lead to degeneration of the sex-limited chromosome. In the early stages of differentiation sex chromosomes are homomorphic, and even though homomorphic sex chromosomes are very common throughout animals and plants, we know little about the evolutionary forces shaping these types of sex chromosomes. We used DNA- and RNA-Seq data from females and males to explore the sex chromosomes in the female heterogametic willow, Salix viminalis, a species with ancient dioecy but with homomorphic sex chromosomes. We detected no major sex differences in read coverage in the sex determination (SD) region, indicating that the W region has not significantly degenerated. However, single nucleotide polymorphism

SUBMITTER: Pucholt P 

PROVIDER: S-EPMC5850815 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature