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Species boundaries inferred from microsatellite markers in the Kielmeyera coriacea complex (Calophyllaceae) and evidence of asymmetric hybridization

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Abstract

Kielmeyera coriacea is one of the most characteristic entities of the Cerrado, a savanna vegetation of Central Brazil and it is a morphologically highly variable polyploid species. In the revision of the genus, an earlier variety was elevated to a related species. However, this proposal has not been accepted by the scientific community and the problematic taxonomic circumscription of the group raises doubts about various scientific studies on plants identified as K. coriacea. In the present study, we investigated the subject by a population genetics approach using eight microsatellite markers in an attempt to understand better the relationships between the proposed species. Like morphological and anatomical observations, molecular studies of highly polymorphic markers showed a great similarity between K. coriacea and K. grandiflora. However, this tool could effectively screen the boundaries of the species complex and, in addition, detect an introgressive hybridization process.

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Acknowledgments

We would like to thank the technicians and students from the Center of Molecular Biology and Genetic Engineering (Unicamp) for technical assistance in the laboratory; and Lea M. E. Amaral, for important field assistance. This research had support from Faepex/Unicamp-Fundação de Apoio ao Ensino, à Pesquisa e Extensão da Universidade Estadual de Campinas. Graduate student and researcher grants from CNPq, Brazil, are acknowledged.

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  1. Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, Campinas, SP, 13083-970, Brazil

    Mayara Krasinski Caddah & Maria do Carmo Estanislau do Amaral

  2. Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6010, Campinas, SP, 13083-970, Brazil

    Anete Pereira de Souza

  3. R. Mario de Nucci 500, Campinas, SP, 13083-290, Brazil

    Volker Bittrich

  4. Brazilian Agricultural Research Corporation, Embrapa Acre, BR 364, km 14, Rio Branco, AC, 69908-970, Brazil

    Tatiana Campos

  5. São Paulo Agency of Technology and Agro-Business, Pólo Apta Centro Sul, SP 127, km 30, Piracicaba, SP, 13400-970, Brazil

    Maria Imaculada Zucchi

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  1. Mayara Krasinski Caddah
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Correspondence to Mayara Krasinski Caddah.

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Caddah, M.K., Campos, T., Zucchi, M.I. et al. Species boundaries inferred from microsatellite markers in the Kielmeyera coriacea complex (Calophyllaceae) and evidence of asymmetric hybridization. Plant Syst Evol 299, 731–741 (2013). https://doi.org/10.1007/s00606-012-0755-9

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