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Updated: May 23, 2026

A Simple Chamber for Long-term Confocal Imaging of Root and Hypocotyl Development
07:59

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Published on: May 17, 2017

The pipid root.

Adam J Bewick1, Frédéric J J Chain, Joseph Heled

  • 1Department of Biology, Life Sciences Building Room 328, McMaster University, 1280 Main Street West Hamilton, ON L8S 4K1, Canada.

Systematic Biology
|March 23, 2012
PubMed
Summary
This summary is machine-generated.

Phylogenomic data resolve pipid frog evolutionary relationships and divergence times, overcoming challenges like genealogical discordance and homoplasy. This study clarifies pipid frog diversification during Gondwanaland

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Area of Science:

  • Evolutionary biology
  • Molecular systematics
  • Phylogenetics

Background:

  • Estimating phylogenetic relationships and divergence times is crucial for understanding evolution but faces challenges like short internodes, genealogical discordance, homoplasy, and incomplete fossil records.
  • Pipid frogs (Pipa, Hymenochirus, Silurana, Xenopus) present complex evolutionary history with disagreements in previous studies, despite a rich fossil record and geological context.

Purpose of the Study:

  • To accurately estimate the evolutionary relationships and divergence times of pipid frog genera.
  • To address analytical challenges in phylogenetics using large phylogenomic datasets and advanced methods.
  • To provide new insights into the biogeography and chronology of pipid diversification.

Main Methods:

  • Generated a large phylogenomic dataset using high-throughput sequencing and public databases.
  • Analyzed sequence data from 113 autosomal regions and mitochondrial genomes of Pipa, Hymenochirus, Silurana, Xenopus, and Rhinophrynus dorsalis.
  • Employed multilocus coalescence methods and multiple analytical approaches to infer species trees and divergence times.

Main Results:

  • Recovered strong support for the ((Xenopus, Silurana)(Pipa, Hymenochirus)) phylogenetic topology.
  • Provided geologically calibrated divergence time estimates consistent with fossil data.
  • The findings offer new insights into pipid frog biogeography and diversification during the breakup of Gondwanaland.

Conclusions:

  • Phylogenomic data are essential for resolving complex phylogenetic problems, particularly in groups with challenging evolutionary histories like pipid frogs.
  • The study successfully integrated molecular data with geological information to reconstruct evolutionary history.
  • This research advances our understanding of pipid frog evolution and demonstrates the power of phylogenomics in molecular systematics.