Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562715
Title The genomes of the livebearing fish species Poeciliopsis retropinna and Poeciliopsis turrubarensis reflect their different reproductive strategies
Author(s) Kruistum, H. van; Guernsey, M.W.; Baker, J.C.; Kloet, Susan L.; Groenen, M.A.M.; Pollux, B.J.A.; Megens, H.J.W.C.
Source Molecular Biology and Evolution (2020). - ISSN 0737-4038 - 15 p.
Department(s) Animal Breeding and Genomics
Experimental Zoology
Aquaculture and Fisheries
Publication type Refereed Article in a scientific journal
Publication year 2020
Abstract The evolution of a placenta is predicted to be accompanied by rapid evolution of genes involved in processes that regulate mother–offspring interactions during pregnancy, such as placenta formation, embryonic development, and nutrient transfer to offspring. However, these predictions have only been tested in mammalian species, where only a single instance of placenta evolution has occurred. In this light, the genus Poeciliopsis is a particularly interesting model for placenta evolution, because in this genus a placenta has evolved independently from the mammalian placenta. Here, we present and compare genome assemblies of two species of the livebearing fish genus Poeciliopsis (family Poeciliidae) that differ in their reproductive strategy: Poeciliopsis retropinna which has a well-developed complex placenta and P. turrubarensis which lacks a placenta. We applied different assembly strategies for each species: PacBio sequencing for P. retropinna (622-Mb assembly, scaffold N50 of 21.6 Mb) and 10 Genomics Chromium technology for P. turrubarensis (597-Mb assembly, scaffold N50 of 4.2 Mb). Using the high contiguity of these genome assemblies and near-completeness of gene annotations to our advantage, we searched for gene duplications and performed a genome-wide scan for genes evolving under positive selection.We find rapid evolution inmajor parts of severalmolecular pathways involved in parent–offspring interaction in P. retropinna, both in the form of gene duplications as well as positive selection. We conclude that the evolution of the placenta in the genus Poeciliopsis is accompanied by rapid evolution of genes involved in similar genomic pathways as found in mammals.
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