AI Article Synopsis
- Understanding how sex chromosomes differentiate is key to grasping evolutionary changes in species.
- The W sex chromosome in the Siamese cobra has many repeats and links with sex chromosomes in other amniotes, providing insights into their evolution.
- Out of 543 identified sex-specific loci, many show relationships to known sex chromosomes and transposable elements, hinting at important regions for sex determination in the cobra.
Article Abstract
Elucidation of the process of sex chromosome differentiation is necessary to understand the dynamics of evolutionary mechanisms in organisms. The W sex chromosome of the Siamese cobra (Naja kaouthia) contains a large number of repeats and shares amniote sex chromosomal linkages. Diversity Arrays Technology provides an effective approach to identify sex-specific loci that are epoch-making, to understand the dynamics of molecular transitions between the Z and W sex chromosomes in a snake lineage. From a total of 543 sex-specific loci, 90 showed partial homology with sex chromosomes of several amniotes and 89 loci were homologous to transposable elements. Two loci were confirmed as W-specific nucleotides after PCR amplification. These loci might result from a sex chromosome differentiation process and involve putative sex-determination regions in the Siamese cobra. Sex-specific loci shared linkage homologies among amniote sex chromosomes, supporting an ancestral super-sex chromosome.
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| http://dx.doi.org/10.1016/j.ygeno.2020.09.058 | DOI Listing |
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