Related Experiment Video
Updated: May 11, 2026
10:00
Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis
Published on: January 12, 2015
Identification of the zebrafish maternal and paternal transcriptomes
Steven A Harvey1, Ian Sealy, Ross Kettleborough
1The Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK. steve.harvey@sanger.ac.uk
Development (Cambridge, England)
|May 31, 2013
Summary
Early zebrafish embryos rely on maternal factors for development. Researchers identified the first zygotic genes and uncovered how maternal mRNAs regulate this crucial maternal-to-zygotic transition.
Area of Science:
- Developmental Biology
- Genomics
- Molecular Biology
Background:
- Early embryonic development relies on maternal transcripts and proteins, not zygotic transcription.
- Zebrafish embryos possess the machinery for transcription but are transcriptionally repressed.
- The maternal-to-zygotic transition is a critical developmental switch.
Purpose of the Study:
- To distinguish maternal and zygotic transcriptomes in early zebrafish embryos.
- To identify the first zygotic genes expressed during development.
- To elucidate the molecular mechanisms governing the maternal-to-zygotic transition.
Main Methods:
- Exome sequencing
- RNA sequencing (RNA-seq)
- Analysis of maternal mRNA regulation
Main Results:
- Successfully discriminated between maternal and zygotic transcriptomes.
- Identified the earliest zygotic genes in zebrafish embryos.
- Revealed distinct maternal mRNA post-transcriptional regulation profiles.
- Demonstrated maternal mRNA roles in diverse zygotic transcription initiation modes.
Conclusions:
- Zygotic gene activation is a complex process involving more than just factor titration.
- Maternal mRNAs play active roles in initiating zygotic transcription.
- Understanding this transition is key to deciphering early embryonic development.
