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Related Experiment Video

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Microinjection of CRISPR/Cas9 Protein into Channel Catfish, Ictalurus punctatus, Embryos for Gene Editing
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Deep Transcriptomic Analysis Reveals the Dynamic Developmental Progression during Early Development of Channel

Xiaoli Ma1,2, Baofeng Su1,2, Yuan Tian1

  • 1School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL 36849, USA.

International Journal of Molecular Sciences
|August 5, 2020
PubMed
Summary

This study details channel catfish early development using RNA sequencing, identifying key genes involved in growth, morphogenesis, and cell cycle regulation. These findings provide crucial insights into fish embryogenesis and offer a valuable dataset for future functional genomics research.

Keywords:
RNA sequencingWGCNAchannel catfishearly development

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Area of Science:

  • Developmental Biology
  • Genomics
  • Ichthyology

Background:

  • The transition from fertilized egg to larva in fish involves complex biological processes.
  • Understanding early development is crucial for aquaculture and evolutionary studies.

Purpose of the Study:

  • To analyze the transcriptome of early developmental stages in channel catfish (Ictalurus punctatus).
  • To identify key genes and biological pathways regulating embryogenesis and larval development.

Main Methods:

  • RNA sequencing (seq) of seven developmental stages.
  • Differential gene expression analysis between timepoints.
  • Weighted Gene Co-expression Network Analysis (WGCNA) to identify gene modules.

Main Results:

  • Identified 22,635 genes and significant enrichment of growth, development, and morphogenesis categories between 2-6 days post fertilization (dpf).
  • Discovered four critical gene co-expression modules.
  • Highlighted hub genes (e.g., GDF10, FOXA2, SYCE3, CK1, OAZ2, TGFB1) involved in head formation, cell cycle, brain development, immune activity, and transport.

Conclusions:

  • The identified genes play vital roles in channel catfish embryogenesis and early development.
  • This study provides a rich dataset for functional genomic research.
  • New insights into the molecular mechanisms underlying channel catfish early development were revealed.