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Chapitre D'ouvrage Année : 2023

Developmental and genetic basis of troglomorphic traits in the teleost fish Astyanax mexicanus

Résumé

Since their discovery in 1936, blind morphs of the genus Astyanax have served as an important model for genetic and developmental studies of trait evolution. An indispensable component of this model system is the presence of extant surface-dwelling morphs, which enable comparative studies with cave-dwelling morphs. This comparative paradigm has provided insight into the developmental basis of a number of constructive traits (e.g., numerical increases in taste and touch receptors) and regressive traits (e.g., pigmentation and vision loss) evolving in this system. Here, we review major discoveries in the developmental regime of cave-dwelling animals, as well as the historic pattern of genetic discoveries. Accordingly, we review the developmental features of troglomorphic traits in cave-dwelling fish, as well as mechanisms underlying cavefish evolution and embryonic origins. We also review the historic timeline of innovation and advancement through genetic and genomic studies in Astyanax. Collectively, this body of work informs how examinations of the developmental and genetic basis for trait evolution has provided insight to the origin of morphological differences in cave animals and animal groups more broadly.
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Dates et versions

hal-04279540 , version 1 (10-11-2023)

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Citer

Joshua Gross, Tyler Boggs, Sylvie Rétaux, Jorge Torres-Paz. Developmental and genetic basis of troglomorphic traits in the teleost fish Astyanax mexicanus. Academic Press. Groundwater Ecology and Evolution 2nd Edition, Elsevier, chapter 15 - 351-371, 2023, 978-0-12-819119-4. ⟨10.1016/B978-0-12-819119-4.00004-4⟩. ⟨hal-04279540⟩
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