Characterization and expression profiles of DMRT1, AMH, SF1 and P450aro genes during gonadal sex differentiation in Patagonian pejerrey Odontesthes hatcheri.

RICARDO HATTORI; JUAN IGNACIO FERNANDINO; CARLOS AUGUSTO STRÜSSMANN; GUSTAVO M. SOMOZA; MASASHI YOKOTA; SEIICHI WATANABE

CYBIUM

Société Française d’Ichtyologie

Año: 2008 vol. 32 p. 95 - 96

0399-0974

Temperature sex determination (TSD) has been documented in many fish species. Our understanding of this mechanism is greatly limited by the difficulty in discerning the genotypic sex of embryos/juveniles prior to morphological sex differentiation. In order to redress this problem, our group recently developed a strain of Odontesthes hatcheri, a species with genotypic sex determination (GSD) and TSD at intermediate and extreme temperatures, respectively, that possesses a SNP sex-linked marker. In this study, we used this strain (BBF1) to analyze how some sex differentiation genes are expressed in this species before and during gonadal sex differentiation at a sexually neutral, intermediate temperature.