Investigation of Sex Determination in Starry Flounder ( ) Reveals Sex Chromosome Evolution in Pleuronectiformes and Identifies a Sex-specific Marker

Overview

Journal Zool Res

Publisher Science Press

Specialties Biology
Veterinary Medicine

Date 2024 Nov 21

PMID 39572017

Authors

Wei-Jing Li

Yu-Man Zhang

Shuo Li

Yu-Yan Liu

Chen Li

Sheng-Lei Han

Kai-Qiang Liu

Lucas Benites Doretto

Bing-Hua Liu

Hai-Jun Huang

Zhi-Long Sun

Qian Wang

Hong-Yan Wang

Chang-Wei Shao

Affiliations

Soon will be listed here.

Abstract

The identification of sex chromosomes is fundamental for exploring the mechanism and evolution of sex determination. , a species exhibiting clear sexual dimorphism and homomorphic chromosome pairs, has received limited research concerning its sex determination mechanisms. Clarifying the sex chromosome of will enhance our understanding of sex chromosome evolution in Pleuronectiformes. This study employed whole-genome resequencing to investigate the sex chromosome and sex determination system in . Notably, Chr23 was identified as the sex chromosome in , with the sex-determining region (SDR) occupying 48.1% of the chromosome and featuring an XX/XY system. Sex chromosome turnover was observed within Pleuronectiformes, with , , and sharing a common ancestral karyotype. No inversions were detected within the SDR of , although chromosomal rearrangements between sex chromosomes and autosomes were identified. Additionally, a sex-specific marker for was ascertained, enabling genetic sex identification, with significant implications for improving breeding programs and aquaculture practices.

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