Genetic structure of Brazilian wild rice (Oryza glumaepatula Steud., Poaceae) populations analyzed using microsatellite markers - Karasawa, Marines Marli Gniech; Vencovsky, Roland; Silva, Cynthia M.; Zucchi, Maria Imaculada; Oliveira, Giancarlo Conde Xavier; Veasey, Elizabeth Ann (Genetics and Molecular Biology, 2007)