Comparative Transcriptome Analysis Reveals Differentially Expressed Genes and Signaling Pathways Between Male and Female Red-Tail Catfish (Mystus wyckioides)
Sexual dimorphism is widespread in fish species. The red-tail catfish (Mystus wyckioides) is a commercially important catfish in the lower reaches of the Lancang River and the Mekong basin, and it shows a growth advantage in males. Here, RNA-seq was for the first time used to explore the gene expression difference between the sexes in the hypothalamus and pituitary of red-tail catfish, respectively. In the hypothalamus, 5732 and 271 unigenes have significantly higher and lower expressions, respectively, in males compared with females. KEGG analysis showed that 212 DEGs were annotated to 216 signaling pathways, and enrichment analysis suggested different levels of cAMP and glutamatergic synapse signaling between male and female hypothalami and some of the DEGs appear involved in gonad development and growth. In the pituitary, we found only 19 differentially expressed unigenes, which were annotated to 32 signaling pathways, most of which play important roles in gonad development.
KeywordsTranscriptome Hypothalamus Pituitary Growth Gonad development
This work was supported by National Key R&D Program of China (2018YFD0901201), the Key Program of Frontier Sciences of the Chinese Academy of Sciences (QYZDY-SSW-SMC025), the Yunnan Academician Workstation (Y73Z04-1-301), the earmarked fund for Modern Agro-industry Technology Research System (NYCYTX-49), and the Autonomous Project of the State Key Laboratory of Freshwater Ecology and Biotechnology (2016FBZ01).
Compliance with Ethical Standards
All experiments and animal treatments were approved by the Institute of Hydrobiology Institutional Animal Care and Use Committee (approval ID, keshuizhuan 0829).
Conflict of Interest
The authors declare that they have no competing interests.
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