Are reptiles predisposed to temperature-dependent sex determination?

Sexual Development : Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation
Arthur GeorgesStephen D Sarre

Abstract

Vertebrates show an astonishing array of sex determining mechanisms, including male and female heterogamety, multiple sex chromosome systems, environmental sex determination, parthenogenesis and hermaphroditism. Sex determination in mammals and birds is extraordinarily conservative compared to that of reptiles, amphibians and fish. In this paper, we explore possible explanations for the diversity of sex determining modes in reptiles, and in particular, address the prevalence of reptilian temperature-dependent sex determination (TSD) and its almost haphazard distribution across the reptile phylogeny. We suggest that reptiles are predisposed to evolving TSD from genotypic sex determination (GSD) by virtue of the uniquely variable thermal environment experienced by their embryos during the critical period in which sex is determined. Explicit mechanisms for canalization of sexual phenotype in the face of high thermal variation during development provide a context for thermolability in sex determination at extremes and the raw material for natural selection to move this thermolability into the developmental mainstream when there is a selective advantage to do so. Release of cryptic variation when canalization is challenged and fails...Continue Reading

Citations

Dec 8, 2009·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Tariq EzazStephen D Sarre
Jan 6, 2012·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Denis O'MeallyJennifer A Marshall Graves
Jan 8, 2011·Biology Letters·Alexander E QuinnArthur Georges
Jul 26, 2012·Conservation Biology : the Journal of the Society for Conservation Biology·Kimberly A MillerNicola J Nelson
Aug 2, 2011·Annual Review of Genomics and Human Genetics·Stephen D SarreArthur Georges
Sep 5, 2012·General and Comparative Endocrinology·Samadhan K Phuge, Narahari P Gramapurohit
Nov 27, 2014·Biological Reviews of the Cambridge Philosophical Society·Martina Johnson Pokorná, Lukáš Kratochvíl
Oct 1, 2011·The Quarterly Review of Biology·Tobias Uller, Heikki Helanterä
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Oct 20, 2011·Developmental Biology·Verónica Díaz-HernándezHoracio Merchant-Larios
Dec 3, 2016·Sexual Development : Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation·Jean-François Baroiller, Helena D'Cotta
Oct 31, 2016·Sexual Development : Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation·Clare E HolleleyArthur Georges
Mar 21, 2017·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Maria Michela PallottaTeresa Capriglione
Jul 5, 2018·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·David T Booth
Jan 18, 2020·Journal of Evolutionary Biology·Lisa E SchwanzStephen D Sarre
Feb 7, 2020·Biological Reviews of the Cambridge Philosophical Society·Meghan A CastelliClare E Holleley
May 13, 2018·Genes·Shayer Mahmood Ibney AlamTariq Ezaz

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