title: Genetic diversity  in a germplasm bank of Oenocarpus mapora (Arecaceae).
abstract: Oenocarpus  mapora is an Amazonian palm species commonly used by native  populations for food and in folk medicine. We measured genetic variability,  using RAPD markers, of material kept in a germplasm bank composed of accessions  sampled from the Brazilian Amazon. These included 74 individuals from 23  accessions sampled from 9 localities in three States of the Brazilian Amazon.  Jaccard genetic similarities were calculated based on 137 polymorphic bands,  amplified by 15 primers. Dendrograms constructed based on the genetic  similarities among individuals and sample localities demonstrated genetic  separation of Acre State from the States of Amazonas and Pará. Two models in  three hierarchical levels were considered for AMOVA: one considering the  grouping of sampling sites in each state, and the other considering sampling  sites in each subgroup formed by the dendrograms. The first model showed no  significant genetic variation among states. On the other hand, genetic  variation among subgroups was significant. In this model, the  within-sample-site genetic diversity was 47.15%, which is considered to be low,  since O. mapora is allogamous. By means of Bayesian analysis, the sample  sites were clustered into five groups, and their distribution was similar to  what we found in the dendrograms based on genetic similarity.
authors.affiliation: Embrapa Amazônia Oriental, Belém, PA, Brasil. elisa@cpatu.embrapa.br
authors.forename: E F
authors.initials: EF
authors.lastname: Moura
authors.forename: M S P
authors.initials: MS
authors.lastname: de Oliveira
mesh_terms: D028023:Arecaceae / Q000235:genetics*; D018070:Biological Specimen Banks; D001938:Brazil; D016000:Cluster Analysis; D060146:Ecotype; D014644:Genetic Variation; D005838:Genotype; D005843:Geography; D008957:Models, Genetic; D010802:Phylogeny; D011110:Polymorphism, Genetic; D012639:Seeds / Q000235:genetics*