A Comparative View on Sex Differentiation and Gametogenesis Genes in Lungfish and Coelacanths

Genome Biology and Evolution
Maria Assunta BiscottiManfred Schartl

Abstract

Gonadal sex differentiation and reproduction are the keys to the perpetuation of favorable gene combinations and positively selected traits. In vertebrates, several gonad development features that differentiate tetrapods and fishes are likely to be, at least in part, related to the water-to-land transition. The collection of information from basal sarcopterygians, coelacanths, and lungfishes, is crucial to improve our understanding of the molecular evolution of pathways involved in reproductive functions, since these organisms are generally regarded as "living fossils" and as the direct ancestors of tetrapods. Here, we report for the first time the characterization of >50 genes related to sex differentiation and gametogenesis in Latimeria menadoensis and Protopterus annectens. Although the expression profiles of most genes is consistent with the intermediate position of basal sarcopterygians between actinopterygian fish and tetrapods, their phylogenetic placement and presence/absence patterns often reveal a closer affinity to the tetrapod orthologs. On the other hand, particular genes, for example, the male gonad factor gsdf (Gonadal Soma-Derived Factor), provide examples of ancestral traits shared with actinopterygians, which ...Continue Reading

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Citations

Sep 22, 2018·Genome Biology and Evolution·Maria Assunta BiscottiAdriana Canapa
Oct 12, 2018·Annual Review of Animal Biosciences·Mateus Contar AdolfiManfred Schartl
Dec 8, 2020·Frontiers in Genetics·Junjian DongXing Ye
Feb 5, 2021·Frontiers in Cell and Developmental Biology·Mateus C AdolfiManfred Schartl
Jul 13, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Mateus Contar AdolfiManfred Schartl
Jul 27, 2021·Frontiers in Cell and Developmental Biology·Chen-Wei Hsu, Bon-Chu Chung
Jul 13, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Matthias StöckYann Guiguen

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Methods Mentioned

BETA
PCRs
PCR
ESR

Software Mentioned

tBLASTn
Gblocks
_ calculator
KaKs
MrBayes
CLC Genomics Workbench
PhyloFish
ClustalW

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