Centro Universitário de Saúde, Ciências Humanas e Tecnológicas do Piauà –UNINOVAFAPI, ua Vitorino Orthiges Fernandes, 6123 - Uruguai, Teresina - PI, 64073-505, Brazil.
Laboratory of Cytogenetics and Mutagenesis. Department of Biological Sciences and Postgraduate Program in Genetics and Plant Breeding. Federal University of PiauÃ, Teresina (PiauÃ)-64009-550, Brazil.