Astyanax surface and cave fish morphs.

EvoDevo
William R. Jeffery

Abstract

The small teleost fish Astyanax mexicanus has emerged as an outstanding model for studying many biological topics in the context of evolution. A major attribute is conspecific surface dwelling (surface fish) and blind cave dwelling (cavefish) morphs that can be raised in the laboratory and spawn large numbers of transparent and synchronously developing embryos. More than 30 cavefish populations have been discovered, mostly in northeastern Mexico, and some are thought to have evolved independently from surface fish ancestors, providing excellent models of parallel and convergent evolution. Cavefish have evolved eye and pigmentation regression, as well as modifications in brain morphology, behaviors, heart regenerative capacity, metabolic processes, and craniofacial organization. Thus, the Astyanax model provides researchers with natural "mutants" to study life in the challenging cave environment. The application of powerful genetic approaches based on hybridization between the two morphs and between the different cavefish populations are key advantages for deciphering the developmental and genetic mechanisms regulating trait evolution. QTL analysis has revealed the genetic architectures of gained and lost traits. In addition, so...Continue Reading

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Citations

Feb 16, 2021·Molecular and Cellular Endocrinology·Ayelén Melisa Blanco, José Luis Soengas
Apr 9, 2021·Developmental Biology·Misty R Riddle, Chi-Kuo Hu
May 1, 2021·Frontiers in Cell and Developmental Biology·Jorge Torres-Paz, Sylvie Rétaux

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Methods Mentioned

BETA
transgenic

Software Mentioned

AIM
AMCS
Ensembl

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