A novel sex-determining QTL in Nile tilapia (Oreochromis niloticus).

ABSTRACT:

Background

Fish species often exhibit significant sexual dimorphism for commercially important traits. Accordingly, the control of phenotypic sex, and in particular the production of monosex cultures, is of particular interest to the aquaculture industry. Sex determination in the widely farmed Nile tilapia (Oreochromis niloticus) is complex, involving genomic regions on at least three chromosomes (chromosomes 1, 3 and 23) and interacting in certain cases with elevated early rearing temperature as well. Thus, sex ratios may vary substantially from 50%.

Results

This study focused on mapping sex-determining quantitative trait loci (QTL) in families with skewed sex ratios. These included four families that showed an excess of males (male ratio varied between 64% and 93%) when re

SUBMITTER: Palaiokostas C 

PROVIDER: S-EPMC4358704 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature