Mismatches between the genetic and phenotypic sex in the wild Kou population of Nile tilapia Oreochromis niloticus.

ABSTRACT: Sex determination and sex chromosomes can be very diverse between teleost species. The group of tilapias shows a polymorphism in sex determination not only between closely related species but also between domestic strains within a species. In the Nile tilapia, the major effect genes and therefore the Y chromosome have been located on either linkage group 1 (LG1) or LG23 depending on the strains. In a Japanese strain, the sex determinant of LG23 (the amhY gene) has been identified as a duplicated amh (anti-Müllerian hormone) gene, with its gametolog found on the X chromosome (amhX). AmhY is located in tandem with the amhΔY gene (a truncated form) on the Y chromosome. X and Y chromosome markers based on the amh genes have been validated only on a few domestic strains but not in wild populati

SUBMITTER: Sissao R 

PROVIDER: S-EPMC6754722 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature