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Jaw and branchial arch mutants in zebrafish II: anterior arches and cartilage differentiation

MPS-Authors
/persons/resource/persons290787

Piotrowski,  T
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons219033

Brand,  M       
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274433

Jiang,  Y-J
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons219231

Heisenberg,  C-P
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons277769

Beuchle,  D
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons219199

Grandel,  H
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274409

van Eeden,  FJM
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274429

Furutani-Seiki,  M
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274425

Granato,  M
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274411

Haffter,  P
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons191086

Hammerschmidt,  M
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274435

Kane,  DA
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274437

Kelsh,  RN       
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274439

Mullins,  MC
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274416

Odenthal,  J
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons274441

Warga,  RM
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons271460

Nüsslein-Volhard,  C
Department Genetics, Max Planck Institute for Developmental Biology, Max Planck Society;

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Citation

Piotrowski, T., Schilling, T., Brand, M., Jiang, Y.-J., Heisenberg, C.-P., Beuchle, D., et al. (1996). Jaw and branchial arch mutants in zebrafish II: anterior arches and cartilage differentiation. Development, 123, 345-356. doi:10.1242/dev.123.1.345.


Cite as: https://hdl.handle.net/21.11116/0000-000D-6FB4-C
Abstract
In a large scale screen for mutants that affect the early development of the zebrafish, 109 mutants were found that cause defects in the formation of the jaw and the more posterior pharyngeal arches. Here we present the phenotypic description and results of the complementation analysis of mutants belonging to two major classes: (1) mutants with defects in the mandibular and hyoid arches and (2) mutants with defects in cartilage differentiation and growth in all arches. Mutations in four of the genes identified during the screen show specific defects in the first two arches and leave the more posterior pharyngeal arches largely unaffected (schmerle, sucker, hoover and sturgeon). In these mutants ventral components of the mandibular and hyoid arches are reduced (Meckel's cartilage and ceratohyal cartilage) whereas dorsal structures (palatoquadrate and hyosymplectic cartilages) are of normal size or enlarged. Thus, mutations in single genes cause defects in the formation of first and second arch structures but also differentially affect development of the dorsal and ventral structures within one arch. In 27 mutants that define at least 8 genes, the differentiation of cartilage and growth is affected. In hammerhead mutants particularly the mesodermally derived cartilages are reduced, whereas jellyfish mutant larvae are characterized by a severe reduction of all cartilaginous elements, leaving only two pieces in the position of the ceratohyal cartilages. In all other mutant larvae all skeletal elements are present, but consist of smaller and disorganized chondrocytes. These mutants also exhibit shortened heads and reduced pectoral fins. In homozygous knorrig embryos, tumor-like outgrowths of chondrocytes occur along the edges of all cartilaginous elements. The mutants presented here may be valuable tools for elucidating the genetic mechanisms that underlie the development of the mandibular and the hyoid arches, as well as the process of cartilage differentiation.