idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Thema Corona

Science Video Project
idw-Abo

idw-News App:

AppStore

Google Play Store



Instanz:
Teilen: 
18.08.2022 15:57

Genetic time travel back 50 million years: Scientific team reveals the correct evolutionary relationships among possums

Dr. Kathrin Kottke Stabsstelle Kommunikation und Öffentlichkeitsarbeit
Westfälische Wilhelms-Universität Münster

    Reunion in the animal kingdom. For decades separated Australasian possums can look forward to a joint future. A study of jumping genes shows that all possums share a common ancestry. In detail, the “presence (1)” or “absence (0) of 61 jumping genes indicates a common origin of all Possums (Phalangeroidea and Petauroidea) and only a distant relationship to kangaroos.

    The brushtail possum asked the sugar glider, “Are we related?” For many years, science answered “No”. For a long time, genetic data provided evidence that the australasiatic possums, the Phalangeroidea (including the brushtail possum) and Petauroidea (including the sugar glider), were divided into two phylogenetic branches without common ancestry.

    But, the research group of Dr. Jürgen Schmitz and Dr. Liliya Doronina from the Institute of Experimental Pathology at the University of Münster (WWU) recently found just the opposite. “Following our analyses of jumping genes, it is clear that all possums share a common ancestry” says Schmitz. In the past, morphological data had already hinted at a common origin of Phalngeroidea and Petauroidea, but DNA sequence analyses challenged and undermined these results.

    In contrast to previous genetic-based studies that examined gene sequences, we analyzed the more reliable insertions of jumping genes. Especially, short interspersed elements (SINEs), which a reliable source for resolving evolutionary relationships among species. “If we find a jumping gene in two species at the exact genomic location, we can be sure they are closely related, as such insertions do not happen by chance”, Schmitz explained.

    The team anlyzed complete genomes from 12 different marsupials, enabling them to investigate thousands of genomic positions. Among these, they found 61 genomic insertions of jumping genes at the exact locations in the genomes of all possum families. “These genetic markers demonstrate that all the various possums evolved from a shared ancestor,” says Doronina.

    The team traveled back 50 million years to clarify this important part of marsupial evolutionary history. Sometimes it is necessary to shake up old scientific ideas to save the biodiversity of species. About 8% of all Australian species became endangered in the last five years. Such animals can be better recognized and protected to retain biodiversity after a reliable estimation of their relatedness.


    Wissenschaftliche Ansprechpartner:

    PD Dr. Juergen Schmitz
    Institute of Experimental Pathology (ZMBE)
    University of Muenster
    Von-Esmarch-Str. 56
    D-48149 Muenster, Germany
    Phone: +49 251 8353066
    E-Mail: jueschm@uni-muenster.de


    Originalpublikation:

    https://doi.org/10.1093/sysbio/syac025


    Bilder

    Specialists for the evolutionary history of marsupials: Dr. Jürgen Schmitz and Dr. Liliya Doronina resolved the enigmatic evolutionary relationships among possums
    Specialists for the evolutionary history of marsupials: Dr. Jürgen Schmitz and Dr. Liliya Doronina r ...

    privat


    Merkmale dieser Pressemitteilung:
    Journalisten
    Biologie, Medizin
    überregional
    Forschungsergebnisse
    Englisch


     

    Specialists for the evolutionary history of marsupials: Dr. Jürgen Schmitz and Dr. Liliya Doronina resolved the enigmatic evolutionary relationships among possums


    Zum Download

    x

    Hilfe

    Die Suche / Erweiterte Suche im idw-Archiv
    Verknüpfungen

    Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.

    Klammern

    Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).

    Wortgruppen

    Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.

    Auswahlkriterien

    Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).

    Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).