Twenty ways to lose your bladder: common natural mutants in zebrafish and widespread convergence of swim bladder loss among teleost fishes

Evolution & Development
Amy R McCune, Rose L Carlson

Abstract

Convergence is an important evolutionary phenomenon often attributed solely to natural selection acting in similar environments. The frequency of mutation and number of ways a phenotypic trait can be generated genetically, however, may also affect the probability of convergence. Here we report both a high frequency of loss of gas bladder (swim bladder) mutations in zebrafish and widespread convergent loss of gas bladders among teleost fishes. The phenotypes of 22 of 27 recessive lethal mutations, carried by a sample of 26 wild-caught zebrafish, involve loss or noninflation of the gas bladder. Nine of these bladderless mutations showed no other obvious phenotypic abnormalities other than the lack of an inflated gas bladder. At least 19 of the 22 bladderless mutations are genetically distinct, as shown by unique morphology or complementation. Although we were not able to obtain eggs for all 21 required crosses to demonstrate definitively that the remaining three mutations are different from all other bladderless mutations, all available evidence suggests that these mutants are also distinct. At least 79 of 425 families of extant teleosts include one or more species lacking a gas bladder as adults. Analysis of the trait's phylogen...Continue Reading

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Citations

Oct 7, 2008·Briefings in Functional Genomics & Proteomics·Harold A Burgess, Michael Granato
Sep 29, 2004·Proceedings. Biological Sciences·Amy R McCuneAlexey S Kondrashov
May 11, 2013·Zygote : the Biology of Gametes and Early Embryos·Laura Satiko Okada NakaghiFrancisco Manoel de Braga
Apr 6, 2005·Evolution; International Journal of Organic Evolution·Matthew E ArnegardCarl D Hopkins
Mar 1, 2013·Evolution & Development·Amanda N CassAmy R McCune
Mar 5, 2014·Journal of Morphology·Joseph T EastmanKristen L Kuhn
Aug 5, 2016·Evolution; International Journal of Organic Evolution·Lauren Sumner-RooneySuzanne T Williams
May 3, 2007·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Sonja GeorgijevicSarah J Childs
Jan 24, 2008·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Tamara A Franz-Odendaal
Feb 10, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Gabriel H Kindl, Kelly E O'Quin
Aug 31, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Emily FunkAmy McCune
Jul 25, 2020·Nature Communications·Yu-Ri LeeCharles E Schwartz
Oct 22, 2020·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Alex M ZimmerSteve F Perry
Apr 10, 2018·The Science of the Total Environment·Le QianChengju Wang
Aug 5, 2005·Development·Audrey Holtzinger, Todd Evans
Mar 11, 2011·The Journal of Experimental Biology·Rose L Carlson, George V Lauder

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