Patterns of Sex Chromosome Differentiation in Spiders: Insights from Comparative Genomic Hybridisation.

ABSTRACT: Spiders are an intriguing model to analyse sex chromosome evolution because of their peculiar multiple X chromosome systems. Y chromosomes were considered rare in this group, arising after neo-sex chromosome formation by X chromosome-autosome rearrangements. However, recent findings suggest that Y chromosomes are more common in spiders than previously thought. Besides neo-sex chromosomes, they are also involved in the ancient X₁X₂Y system of haplogyne spiders, whose origin is unknown. Furthermore, spiders seem to exhibit obligatorily one or two pairs of cryptic homomorphic XY chromosomes (further cryptic sex chromosome pairs, CSCPs), which could represent the ancestral spider sex chromosomes. Here, we analyse the molecular differentiation of particular types of spider

SUBMITTER: Sember A 

PROVIDER: S-EPMC7466014 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature