Estudos de acessos de Asnacardium Humile a. st. hill por meio da caracterização morfológica e de marcadores rapd

Abstract

The knowledge of the genetic variability of the bushy cashew is important to maximize the use of its genetic resources to future programs of improvement and conservation of the species. In this report, the genetic variability of 122 accesses of A. humile coming from 11 cities (provenances) from Cerrado was quantified through RAPD markers. The primers with bigger expression were OPA11 and 08. The ten primers used generated 157 bands, being 156 polymorphic (99%), with an average of 15,6 bands/ primer. It was detected a great variability in the towns, being the polymorphism higher than 90%, except the ones original from Jataí-GO. The accessions of Caiapônia-GO and Santo Antônio do Descoberto-GO were the most distant genetically. The total dissimilarity between accesses ranged from 0,103 to 0,796, with averages of 0,390. The accesses 87 and 114 from Serranópolis-GO and Santo Antônio do Descoberto-GO, respectively, were the most distant genetically, showing the importance of these prevenances in the enrichment of the germoplasm bank of the specie. The cajuzinho-do-cerrado presents a high rate of genetic variability is considered a potential species in conservation programs in sit u and ex situ and in breeding programs is that most of this is within their populations.