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Related Experiment Video

Updated: Jul 6, 2026

Production of Haploid Zebrafish Embryos by In Vitro Fertilization
07:54

Production of Haploid Zebrafish Embryos by In Vitro Fertilization

Published on: July 14, 2014

Maternal nodal and zebrafish embryogenesis.

James T Bennett1, Heather L Stickney, Wen-Yee Choi

  • 1Developmental Genetics Program, Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, New York 10016, USA.

Nature
|November 13, 2007
PubMed
Summary

Maternally provided Squint (Sqt) and Cyclops (Cyc) Nodal signals are not essential for dorsal axis formation in zebrafish. This study refutes the hypothesis that these maternal Nodal activities determine dorsoventral patterning in fish and amphibians.

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Area of Science:

  • Developmental biology
  • Molecular biology
  • Genetics

Background:

  • Dorsal axis specification in fish and amphibians relies on asymmetric Wnt pathway component localization.
  • Gore et al. proposed that maternal Squint (Sqt) acts as a dorsal determinant in zebrafish.

Discussion:

  • This research directly tested the hypothesis proposed by Gore et al. regarding the role of maternal Nodal signaling in zebrafish dorsoventral patterning.
  • The findings challenge the established understanding of maternal determinants in early embryonic development.

Key Insights:

  • Maternal activities of the Nodal genes Squint (Sqt) and Cyclops (Cyc) are demonstrated to be dispensable for establishing the dorsal axis in zebrafish.
  • The study provides critical evidence against the requirement of these specific maternal Nodal signals for dorsoventral patterning.

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Related Experiment Videos

Last Updated: Jul 6, 2026

Production of Haploid Zebrafish Embryos by In Vitro Fertilization
07:54

Production of Haploid Zebrafish Embryos by In Vitro Fertilization

Published on: July 14, 2014

Generation of Parabiotic Zebrafish Embryos by Surgical Fusion of Developing Blastulae
10:38

Generation of Parabiotic Zebrafish Embryos by Surgical Fusion of Developing Blastulae

Published on: June 11, 2016

A Simple and Effective Transplantation Device for Zebrafish Embryos
06:59

A Simple and Effective Transplantation Device for Zebrafish Embryos

Published on: August 2, 2021

Outlook:

  • Further investigation into alternative maternal factors or pathways involved in zebrafish dorsal axis formation is warranted.
  • This work may necessitate a re-evaluation of the roles of Nodal signaling in early vertebrate development across different species.