On the rediscovery of Volvox perglobator (Volvocales, Chlorophyceae) and the evolution of outcrossing from self-fertilization

Erik R. Hanschen, Dinah R. Davison, Patrick J. Ferris, Richard E Michod

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Hypothesis: Genetic recombination underlies the frequent origins of self-fertilization and rare reversions to outcrossing. Organisms: Volvox perglobator, Gonium pectorale, volvocine green algae. Methods: We report the rediscovery of a volvocine alga, obligate outcrossing V. perglobator, including morphological characteristics and molecular phylogeny. We use ancestral-state reconstruction and phylogenetic simulation to demonstrate multiple transitions between self-fertilization and outcrossing. We sequence sex-determining genes in multiple volvocine algae. Results: We find significant support for numerous origins of self-fertilization and multiple reversions to outcrossing. Volvox perglobator is one of these reversions to outcrossing. Combination of ancestrally sex-restricted and sex-determining genes into the same genotype correlates with the evolution of self-fertilization. Re-segregation of these same sex-determining loci into separate sexes correlates with the evolution of outcrossing. These results suggest that recombination underlies the evolutionary transitions between self-fertilization and outcrossing in the volvocine algae.

Original languageEnglish (US)
Pages (from-to)299-318
Number of pages20
JournalAegyptus
Volume19
Issue number3
StatePublished - May 1 2018

Fingerprint

phylogeny
segregation
reconstruction
simulation
Rediscovery
Gene
Recombination

Keywords

  • Homothallism
  • Phylogenetics
  • Reversion
  • Self-fertilization
  • Sexual reproduction
  • Volvocine green algae

ASJC Scopus subject areas

  • Archaeology
  • History
  • Archaeology

Cite this

On the rediscovery of Volvox perglobator (Volvocales, Chlorophyceae) and the evolution of outcrossing from self-fertilization. / Hanschen, Erik R.; Davison, Dinah R.; Ferris, Patrick J.; Michod, Richard E.

In: Aegyptus, Vol. 19, No. 3, 01.05.2018, p. 299-318.

Research output: Contribution to journalArticle

Hanschen, Erik R. ; Davison, Dinah R. ; Ferris, Patrick J. ; Michod, Richard E. / On the rediscovery of Volvox perglobator (Volvocales, Chlorophyceae) and the evolution of outcrossing from self-fertilization. In: Aegyptus. 2018 ; Vol. 19, No. 3. pp. 299-318.
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