Dynamic transcriptome analysis during early development of black rockfish (Sebastes schlegelii)

Area of Science:

• Aquaculture
• Developmental Biology
• Genomics

Background:

• Black rockfish (Sebastes schlegelii) are crucial for aquaculture but suffer population declines.
• Larval rearing is difficult, leading to deformities and slow growth in high-density cultures.

Purpose of the Study:

• To understand the molecular mechanisms behind rapid growth and developmental transitions in black rockfish.
• To identify genes and pathways involved in early development for aquaculture improvement.

Main Methods:

• Transcriptomic profiling using RNA-Sequencing (RNA-Seq) across three developmental stages (larval, post-larval, juvenile).
• Differential gene expression analysis, Gene Ontology (GO) enrichment, and KEGG pathway analysis.
• Identification of key 'hub' genes regulating growth and differentiation.

Main Results:

• Significant dynamic transcriptomic changes were observed between developmental stages.
• Stage-specific pathways identified include antigen processing (larvae) and autophagy (post-larvae).
• Metabolic pathways like long-term potentiation and proteasome-mediated protein degradation were highlighted, with hub genes (haao, sec61a1, vcp) linked to metabolism and protein synthesis.

Conclusions:

• This study provides foundational transcriptomic data for black rockfish early development.
• Identified genes and pathways offer a molecular basis for enhancing larval survival and aquaculture performance.