Sex is determined by XX/XY sex chromosomes in Australasian side-necked turtles (Testudines: Chelidae).

ABSTRACT: Turtles demonstrate variability in sex determination and, hence, constitute an excellent model for the evolution of sex chromosomes. Notably, the sex determination of the freshwater turtles from the family Chelidae, a species-rich group with wide geographical distribution in the southern hemisphere, is still poorly explored. Here we documented the presence of an XX/XY sex determination system in seven species of the Australasian chelid genera Chelodina, Emydura, and Elseya by conventional (karyogram reconstruction, C-banding) and molecular cytogenetic methods (comparative genome hybridization, in situ hybridization with probes specific for GATA microsatellite motif, the rDNA loci, and the telomeric repeats). The sex chromosomes are microchromosomes in all examined species of the genus Chel

SUBMITTER: Mazzoleni S 

PROVIDER: S-EPMC7062838 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature