Plant Systematics and Evolution

, Volume 300, Issue 7, pp 1693–1705

Genetic structure of disjunct Argentinean populations of the subtropical tree Anadenanthera colubrina var. cebil (Fabaceae)

Authors

    • Departamento de Genética. Facultad de Ciencias Exactas, Químicas y NaturalesUniversidad Nacional de Misiones
    • Instituto de Biología Subtropical (UNaM-CONICET)
    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET-Argentina)
  • María Victoria García
    • Departamento de Genética. Facultad de Ciencias Exactas, Químicas y NaturalesUniversidad Nacional de Misiones
    • Instituto de Biología Subtropical (UNaM-CONICET)
    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET-Argentina)
  • Kathleen Prinz
    • Institute for Systematic Botany with Herbarium Haussknecht and Botanical GardensFriedrich-Schiller-University Jena
    • Forest Genetics and Forest Tree BreedingGeorg-August-University Göttingen
  • Rolando Rivera Pomar
    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET-Argentina)
    • Laboratorio de Genética y Genómica Funcional, Centro Regional de Estudios GenómicosUniversidad Nacional de La Plata
  • Reiner Finkeldey
    • Forest Genetics and Forest Tree BreedingGeorg-August-University Göttingen
Original Article

DOI: 10.1007/s00606-014-0995-y

Cite this article as:
Barrandeguy, M.E., García, M.V., Prinz, K. et al. Plant Syst Evol (2014) 300: 1693. doi:10.1007/s00606-014-0995-y
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Abstract

Anadenanthera colubrina var. cebil is a native South American tree species inhabiting seasonally dry tropical forests (SDTFs). Its current disjunct distribution presumably represents fragments of a historical much larger area of this forest type, which has also been highly impacted by human activities. In this way the hypothesis of this study is that the natural populations of A. colubrina var. cebil from Northern Argentina represent vestiges of ancient fragmentation, but they are additionally influenced by a certain degree of gene flow among them. We aimed to analyze the genetic structure of both nuclear and chloroplast DNA to evaluate the relative role of ancient and recent fragmentation on intraspecific diversity patterns. Sixty-nine individuals of four natural populations were analyzed using eight nuclear microsatellites (ncSSR) and four chloroplast microsatellite loci (cpSSR). The level and distribution of genetic variation were estimated by standard population genetic parameters and Neighbor Joining as well as Bayesian analyses. The eight ncSSR loci were highly polymorphic, while genetic diversity of cpSSRs was low. Nuclear SSRs displayed lower genetic differentiation among populations than cpSSR haplotypes (FST 0.11 and 0.95, respectively). However, high differentiation between phytogeographic provinces was observed in both genomes. The high genetic differentiation detected emphasizes the role of ancient fragmentation. However, the Paranaense province also shows the effects of recent fragmentation on genetic structure, whereas gene flow by pollen preserves the effects of genetic drift in the Yungas province.

Keywords

CurupayChloroplast haplotypesGenetic structureMicrosatellitesSeasonally dry tropical forests (SDTFs)

Copyright information

© Springer-Verlag Wien 2014