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Related Experiment Videos

Is cladogenesis heritable?

Vincent Savolainen1, Stephen B Heard, Martyn P Powell

  • 1Molecular Systematics Section, Jodrell Laboratory, Royal Botanic Gardens, Kew TW9 3DS, UK. v.savolainen@rbgkew.org.uk

Systematic Biology
|January 30, 2003
PubMed
Summary
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Speciation rates show heritability, meaning traits influencing lineage splitting are passed down. This study provides broad evidence for heritable cladogenesis across diverse taxa, impacting macroevolutionary models.

Area of Science:

  • Evolutionary biology
  • Macroevolutionary studies
  • Phylogenetics

Background:

  • Heritability of speciation rates and extinction risks is key for macroevolutionary models.
  • Direct evidence for this heritability has been limited.
  • Previous studies suggested heritability in birds.

Purpose of the Study:

  • To test for the heritability of speciation rates across diverse taxa.
  • To assess the occurrence, strength, and generality of heritable cladogenesis.
  • To apply an established phylogenetic test to large-scale DNA sequence data.

Main Methods:

  • Correlating ancestral and descendant branch lengths in phylogenetic trees.
  • Utilizing DNA sequence-based phylogenetic analyses for plants, insects, fungi, and bacteria.

Related Experiment Videos

  • Employing maximum parsimony, maximum likelihood, nonparametric rate smoothing, and molecular clock methods.
  • Using a randomization procedure to assess the statistical significance of results.

    • Main Results:

    • A pattern consistent with heritable net cladogenesis was found in most clades analyzed.
    • The study applied an established phylogenetic test to large-scale DNA sequence data.
    • Evidence for heritability was detected across a broad range of taxa, including plants, insects, fungi, and bacteria.

    Conclusions:

    • Heritability of cladogenesis appears to be a general phenomenon.
    • This heritability is detectable across numerous lineages and diverse taxa.
    • Findings support the inclusion of heritable speciation rates in macroevolutionary models.