Disentangling the relationship of the Australian marsupial orders using retrotransposon and evolutionary network analyses

Genome Biology and Evolution
Susanne GallusM A Nilsson

Abstract

The ancestors to the Australian marsupials entered Australia around 60 (54-72) Ma from Antarctica, and radiated into the four living orders Peramelemorphia, Dasyuromorphia, Diprotodontia, and Notoryctemorphia. The relationship between the four Australian marsupial orders has been a long-standing question, because different phylogenetic studies have not been able to consistently reconstruct the same topology. Initial in silico analysis of the Tasmanian devil genome and experimental screening in the seven marsupial orders revealed 20 informative transposable element insertions for resolving the inter- and intraordinal relationships of Australian and South American orders. However, the retrotransposon insertions support three conflicting topologies regarding Peramelemorphia, Dasyuromorphia, and Notoryctemorphia, indicating that the split between the three orders may be best understood as a network. This finding is supported by a phylogenetic reanalysis of nuclear gene sequences, using a consensus network approach that allows depicting hidden phylogenetic conflict, otherwise lost when forcing the data into a bifurcating tree. The consensus network analysis agrees with the transposable element analysis in that all possible topologie...Continue Reading

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Citations

May 7, 2016·Systematic Biology·Claudia Solís-LemusCécile Ané
Nov 25, 2016·Scientific Reports·Benjamin P KearMichael Westerman
Jan 27, 2017·Brain, Behavior and Evolution·Sandra E Dos SantosSuzana Herculano-Houzel
Jul 13, 2020·Journal of Evolutionary Biology·Julie MarinAmaury Lambert
May 6, 2017·BMC Evolutionary Biology·Axel H NewtonAndrew J Pask
Feb 17, 2017·Zoological Letters·Marcelo R Sánchez-Villagra, Analía M Forasiepi

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Methods Mentioned

BETA
Amplicon Taq
PCR

Software Mentioned

BLAT
CENSOR
jModelTest
MrBayes
SplitsTree4
Geneious

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