Genetic determination and JARID2 over-expression in a thermal incubation experiment in Casque-Headed Lizard.

ABSTRACT: Non-avian reptiles, unlike mammals and birds, have undergone numerous sex determination changes. Casque-Headed Lizards have replaced the ancestral XY system shared across pleurodonts with a new pair of XY chromosomes. However, the evolutionary forces that triggered this transition have remained unclear. An interesting hypothesis suggests that species with intermediate states, with sex chromosomes but also thermal-induced sex reversal at specific incubation temperatures, could be more susceptible to sex determination turnovers. We contrasted genotypic data (presence/absence of the Y chromosome) against the histology of gonads of embryos from stages 35-37 incubated at various temperatures, including typical male-producing (26°C) and female-producing (32°C) temperatures. Our work apparently r

SUBMITTER: Suarez-Varon G 

PROVIDER: S-EPMC9262179 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature