Edited by David M. Hillis, The University of Texas at Austin, Austin, TX, and authorized 6, 2019 (received for review April 1, 2019 august)
Morphologically and chromosomes have over repeatedly developed over the tree of life. But, the degree of differentiation between your sex chromosomes varies considerably across species. As intercourse chromosomes diverge, the Y chromosome gene task decays, making genes in the intercourse chromosomes paid down to just one practical content in men. Mechanisms have actually developed to pay with this decrease in gene dosage. right right Here, we perform relative analysis of intercourse chromosome systems across poeciliid species and unearth extreme variation in the amount of intercourse chromosome differentiation and Y chromosome degeneration. Also, we find proof for the full instance of chromosome-wide dosage compensation in seafood. Our findings have actually crucial implications for intercourse chromosome development and legislation.
As soon as recombination is halted involving the X and Y chromosomes, sex chromosomes start to differentiate and change to heteromorphism. Because there is a variation that is remarkable clades within the level of intercourse chromosome divergence, much less is famous concerning the variation in intercourse chromosome differentiation within clades. right Here, we combined whole-genome and sequencing that is transcriptome to characterize the dwelling and preservation of intercourse chromosome systems across Poeciliidae, the livebearing clade that features guppies. We discovered that the Poecilia reticulata XY system is a lot more than formerly thought, being provided not merely having its sis types, Poecilia wingei, but additionally with Poecilia picta, which diverged approximately 20 million years back. “Extreme heterogeneity in intercourse chromosome differentiation and dosage payment in livebearers” の続きを読む