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Title: Genetic diversity and structure of Oenocarpus mapora germplasm conserved at eastern Amazon
Other Titles: Diversidade e estruturação genética em germoplasma de Oenocarpus mapora conservado na Amazônia Oriental
Keywords: Oenocarpus mapora
Germoplasma vegetal
Genética vegetal
Melhoramento genético
Amazônia oriental
Issue Date: Dec-2015
Publisher: Universidade Federal do Pará
Citation: MOURA, Elisa Ferreira et al. Genetic diversity and structure of Oenocarpus mapora germplasm conserved at eastern Amazon. Revista Brasileira de Fruticultura, Jaboticabal, v. 3, n. 4, p. 984-992, out./dez. 2015. Disponível em: <>. Acesso em: 10 jan. 2017. <>.
Abstract: The aim of this study was to evaluate the genetic diversity and structure in the germoplasm of Oenocarpus mapora conserved at Eastern Amazon. Thus, 88 individuals were genotyped with five microsatellite loci. These individuals belong to 24 accessions that were sampled in eight sample places of three Brazilian Amazon states conserved at the Active Germplasm Bank (AGB) of Embrapa Eastern Amazon. All loci were polymorphic and they generated 85 alleles with an average of 17 alleles per loci. Total genetic diversity (HE) was 0.48. Sample places were considered genetically distinct, with ?p = 0.354. The analysis of molecular variance (AMOVA) identified that the genetic portion among areas was of 36.14% and within 63.86%. The Nei distances varied from 0.091 between Abaetetuba and Santo Antônio do Tauá, both in the state of Pará (PA), to 4.18, between Parintins, AM and Rio Branco, AC. By means of Bayesian analysis, it was identified nine clusters that compose the accessions of the germplasm bank, with different distributions among individuals. The study showed high fixation rates per sample area, which indicates that there may have been significant inbreeding or crossing among parental individuals. It suggests that future samples should be made of different plants in natural populations. Even though, it was verified that there is considerable genetic variation in the germplasm of O. mapora.
ISSN: 1806-9967
Appears in Collections:Artigos Científicos - ICB

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