Phylogenomic analyses of all species of swordtail fishes (genus Xiphophorus) show that hybridization preceded speciation.

Autor: Du K; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA., Ricci JMB; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA., Lu Y; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA., Garcia-Olazabal M; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA., Walter RB; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA., Warren WC; Department of Animal Sciences, Department of Surgery, Institute for Data Science and Informatics, University of Missouri, Bond Life Sciences Center, Columbia, MI, USA., Dodge TO; Department of Biology & Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA., Schumer M; Department of Biology & Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA., Park H; Division of Biotechnology, College of Life Science and Biotechnology, Korea University, Seoul, Republic of Korea., Meyer A; Department of Biology, University of Konstanz, Konstanz, Germany. axel.meyer@uni-konstanz.de., Schartl M; The Xiphophorus Genetic Stock Center, Texas State University, San Marcos, Texas, TX, USA. phch1@biozentrum.uni-wuerzburg.de.; Developmental Biochemistry, Biocenter, University of Wuerzburg, Am Hubland, Wuerzburg, Germany. phch1@biozentrum.uni-wuerzburg.de.; Research Department for Limnology, University of Innsbruck, Mondsee, Austria. phch1@biozentrum.uni-wuerzburg.de.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Aug 04; Vol. 15 (1), pp. 6609. Date of Electronic Publication: 2024 Aug 04.
DOI: 10.1038/s41467-024-50852-6
Abstrakt: Hybridization has been recognized to play important roles in evolution, however studies of the genetic consequence are still lagging behind in vertebrates due to the lack of appropriate experimental systems. Fish of the genus Xiphophorus are proposed to have evolved with multiple ancient and ongoing hybridization events. They have served as an informative research model in evolutionary biology and in biomedical research on human disease for more than a century. Here, we provide the complete genomic resource including annotations for all described 26 Xiphophorus species and three undescribed taxa and resolve all uncertain phylogenetic relationships. We investigate the molecular evolution of genes related to cancers such as melanoma and for the genetic control of puberty timing, focusing on genes that are predicted to be involved in pre-and postzygotic isolation and thus affect hybridization. We discovered dramatic size-variation of some gene families. These persisted despite reticulate evolution, rapid speciation and short divergence time. Finally, we clarify the hybridization history in the entire genus settling disputed hybridization history of two Southern swordtails. Our comparative genomic analyses revealed hybridization ancestries that are manifested in the mosaic fused genomes and show that hybridization often preceded speciation.
(© 2024. The Author(s).)
Databáze: MEDLINE
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