Format

Send to

Choose Destination
Sex Dev. 2018 Jun 19. doi: 10.1159/000490124. [Epub ahead of print]

Triploid Colubrid Snake Provides Insight into the Mechanism of Sex Determination in Advanced Snakes.

Abstract

The advanced snakes (Caenophidia), the important amniote lineage encompassing more than 3,000 living species, possess highly conserved female heterogamety across all families. However, we still lack any knowledge on the gene(s) and the molecular mechanism controlling sex determination. Triploid individuals spontaneously appear in populations of diploid species and can provide an important insight into the evolution of sex determination. Here, we report a case of spontaneous triploidy in a male of the twin-spotted ratsnake (Elaphe bimaculata) with ZZW sex chromosomes. We speculate that as both ZZ and ZZW individuals develop male gonads, the ratio between the number of Z chromosomes and autosomes, and not the presence of the W chromosome in the genome, drives sex determination in the advanced snakes.

KEYWORDS:

Female heterogamety; Reptiles; Sex chromosomes; Triploidy

PMID:
29913458
DOI:
10.1159/000490124

Supplemental Content

Full text links

Icon for S. Karger AG, Basel, Switzerland
Loading ...
Support Center