, Volume 137, Issue 2, pp 221–231 | Cite as

Genetic analysis of a local population of Oryza glumaepatula using SSR markers: implications for management and conservation programs

  • Ana Rosa de Campos Vaz
  • Tereza Cristina de Oliveira Borba
  • Claudio Brondani
  • Paulo Hideo Nakano Rangel
  • Graziela Silvia de Oliveira Camargo
  • Mariana Pires de Campos Telles
  • José Alexandre Felizola Diniz Filho
  • Rosana Pereira Vianello Brondani


Knowledge of natural diversity and population structures of wild species, which might be related to cultivated species, is fundamental for conservation and breeding purposes. In this study, a genetic characterization of a large population of Oryza glumaepatula, occurring in a 10 km2 area located at Tamengo Basin (Paraguay River, Brazil), was performed using SSR markers. This population is annually dragged from the river to permit navigation; one goal of this study was to examine the impact of this removal on genetic variability. From 18 polymorphic SSR markers, a total of 190 alleles were detected in a sample of 126 individuals, with an average of 10.3 alleles/locus, and a He of 0.67. The five QTL-related markers showed an average He value of 0.56, while the remaining 13 markers detected an average estimate of 0.70. An apparent outcrossing rate of 30%, a high proportion of alleles at low frequencies (56%), and the presence of exclusive alleles (9.5%) were found, with strong evidence of the establishment of individuals from different populations upstream in the Paraguay River. For conservation purposes, the river drag has no effect on the population. However, periodical seed collection from the Corumbá population can preserve part of the genetic variability present in upstream populations reducing the need for upriver collecting expeditions.


Conservation genetics Wild rice Microsatellite markers Natural genetic resources Paraguay River Population genetics 


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Ana Rosa de Campos Vaz
    • 1
    • 2
  • Tereza Cristina de Oliveira Borba
    • 1
  • Claudio Brondani
    • 1
  • Paulo Hideo Nakano Rangel
    • 1
  • Graziela Silvia de Oliveira Camargo
    • 3
  • Mariana Pires de Campos Telles
    • 4
  • José Alexandre Felizola Diniz Filho
    • 5
  • Rosana Pereira Vianello Brondani
    • 1
  1. 1.Laboratório de Biotecnologia Vegetal, EmbrapaCentro Nacional de Pesquisa de Arroz e FeijãoGoiâniaBrazil
  2. 2.Departamento de BiologiaUniversidade Católica de GoiásGoiâniaBrazil
  3. 3.Departamento de BiologiaUniversidade Anhanguera Centro Universitário de GoiásGoiâniaBrazil
  4. 4.Departamento de ZootecniaUniversidade Católica de GoiásGoiâniaBrazil
  5. 5.Departamento de Ecologia e EvoluçãoUniversidade Federal de GoiásGoiâniaBrazil

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