Brittonia

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Chromosome Chaetogastra (Melastomataceae, Melastomateae)

  • Fabrício Schmitz Meyer
  • Klenya Rocha Braga
  • Eliana R. Forni-Martins
  • Renato Goldenberg
Article
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Abstract

Chaetogastra is the largest genus in Melastomateae, with about 165–190 species. The genus was only recently resurrected, based on species that have been traditionally treated in Tibouchina sects. Diotanthera, Pseudopterolepis, Purpurella and Simplicicaules. This article presents 15 chromosome counts for the genus, a review of the available counts and also a discussion of these counts in a systematic context. Although the sampling in the genus is still poor, the data found in the literature and in our research indicate x=9 as the base chromosome number for the genus. We also found that euploidy may be common in Chaetogastra, with diploid, tetraploid and hexaploid species. Basic chromosome numbers also seem to be a taxonomic character that distinguishes Chaetogastra (x=9) from Brachyotum (x=10).

Keywords

Brachyotum cytogenetics Tibouchina 

Notes

Acknowledgments

We thank Sandra Maria Carmello Guerreiro for the permission to use the Optic Microscope in the Laboratory of Plant Anatomy at Universidade Estadual de Campinas, Frank Almeda for the assistance with bibliography on chromosome counts of Melastomataceae, and two anonymous reviewers for the suggestions on a previous version of this work.

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Copyright information

© The New York Botanical Garden 2018

Authors and Affiliations

  • Fabrício Schmitz Meyer
    • 1
  • Klenya Rocha Braga
    • 1
  • Eliana R. Forni-Martins
    • 2
  • Renato Goldenberg
    • 3
  1. 1.Programa de Pós-Graduação em Biologia VegetalUniversidade Estadual de CampinasSão PauloBrazil
  2. 2.Departamento de Biologia VegetalUniversidade Estadual de CampinasSão PauloBrazil
  3. 3.Departamento de BotânicaUniversidade Federal do ParanáParanáBrazil

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