Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

Página do item simplificado
dc.contributor.authorIbanes, B.
dc.contributor.authorSebbenn, A. M.
dc.contributor.authorAzevedo, V. C.R.
dc.contributor.authorMoreno, M. A.
dc.contributor.authorGandara, F. B.
dc.contributor.authorTambarussi, E. V. [UNESP]
dc.contributor.authorFerraz, E. M.
dc.contributor.authorDamasceno-Silva, K. J.
dc.contributor.authorLima, P. S.C.
dc.contributor.authorCarvalhaes, M. A.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionInstituto Florestal de São Paulo
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:12:05Z
dc.date.available2018-12-11T17:12:05Z
dc.date.issued2015-01-01
dc.description.abstractGenetic studies in tropical tree species have found signs of decreased genetic diversity and increased levels of inbreeding and spatial genetic structure (SGS) in fragmented and exploited populations. The aim of this paper was to investigate genetic diversity, structure, and intrapopulation SGS using eight microsatellite loci for three Orbignya phalerata populations that have undergone different intensities of seed harvesting. From each population, we georeferenced and sampled 30 seedlings, 30 juveniles, and 30 adult trees. The total number of alleles over all loci (k), and observed (Ho) and expected heterozygosity (He) presented lower values for the population experiencing more intense fruit harvesting than less heavily exploited populations, suggesting that fruit harvesting may decrease genetic diversity. Null alleles were detected in practically all loci among seedlings, juveniles, and adults in all populations, indicating that the estimates of Ho, He and fixation index (F) are biased. When corrected for null alleles (FNull), the fixation index decreased for all samples, resulting in significantly higher than zero results for seedlings of all populations, but not for juveniles and adults of all populations. The comparison of FNull values between cohorts in the most heavily exploited population (ESP) suggests that inbred individuals are eliminated between seedling and adult stages. Significant SGS was detected up to 60 m in all populations, which indicates short distance seed dispersal. Genetic differentiation (G'ST) between pairwise populations was related to spatial distance between populations, with the greatest difference between more distant populations.en
dc.description.affiliationEscola Superior de Agricultura Luiz de Queiroz Universidade de São Paulo, Av. Pádua Dias, 11
dc.description.affiliationInstituto Florestal de São Paulo, CP 1322
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária-Recursos Genéticos e Biotecnologia, Av. W5 Norte (final) CP 02372
dc.description.affiliationPrograma de Pós Graduação em Ciência Florestal -FCA/UNESP - Botucatu Rua José Barbosa de Barros, No 1780 Portaria II: Rodovia Alcides Soares
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária - Meio Norte, Av. Duque de Caxias, 5650
dc.description.affiliationUnespPrograma de Pós Graduação em Ciência Florestal -FCA/UNESP - Botucatu Rua José Barbosa de Barros, No 1780 Portaria II: Rodovia Alcides Soares
dc.format.extent201-211
dc.identifier.citationSilvae Genetica, v. 64, n. 5-6, p. 201-211, 2015.
dc.identifier.issn0037-5349
dc.identifier.scopus2-s2.0-85019607504
dc.identifier.urihttp://hdl.handle.net/11449/174610
dc.language.isoeng
dc.relation.ispartofSilvae Genetica
dc.relation.ispartofsjr0,225
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBabassu
dc.subjectExploitation
dc.subjectForest management
dc.subjectGenetic diversity
dc.subjectOrbignya phalerata
dc.titleGenetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savannaen
dc.typeArtigo
unesp.departmentCiência Florestal - FCApt

Arquivos

Coleções

Botucatu - FCA - Faculdade de Ciências Agronômicas