Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil

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dc.creatorSoares, Sabrina Delgado
dc.creatorBandeira, Ludmila Ferreira
dc.creatorRibeiro, Stela Barros
dc.creatorTelles, Mariana Pires de Campos
dc.creatorSilva, João Augusto da
dc.creatorBorges, Canrobert Tormin
dc.creatorCoelho, Alexandre Siqueira Guedes
dc.creatorNovaes, Evandro
dc.date.accessioned2023-02-01T14:28:07Z
dc.date.available2023-02-01T14:28:07Z
dc.date.issued2020
dc.description.abstractGiven its high-valued wood, the African mahogany (Khaya grandifoliola) has been envisaged as a renewable source of tropical hardwoods in Brazil. However, there are concerns about the hypothesized low diversity among the few K. grandifoliola germplasm sources introduced in the country. Using eight microsatellite markers, we evaluated the genetic diversity and divergence among 53 superior trees selected from three provenances of K. grandifoliola located in the state of Pará. These populations are among the oldest plantations (>15 years) in Brazil and, therefore, the country’s main seed sources. The average number of alleles per locus was 5.9, expected heterozygosity was moderate (HE=0.56) and lower than the high observed heterozygosity (HO=0.74). Therefore, the intrapopulation fixation index was negative (f=-0.31) indicating the possibility that selection of superior trees might have favored heterozygous plants with heterosis. No genetic structure was observed between provenances. The genetic diversity observed within selected trees, with an effective population size (Ne) of 30.4, is comparable to that of natural populations of African and Brazilian mahoganies. Therefore, our results contradict the idea that the genetic diversity of K. grandifoliola introduced in Brazil is low and show that our germplasm can be exploited for breeding purposes.pt_BR
dc.identifier.citationSOARES, Sabrina Delgado et al. Genetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazil. Genetics and Molecular Biology, Ribeirão Preto, v. 43, n. 2, e20180162, 2020. DOI: 10.1590/1678-4685-GMB-2018-0162. Disponível em: https://www.scielo.br/j/gmb/a/zNFjG7GkVBXJMNNRTymg9Rt/?format=pdf&lang=en. Acesso em: 25 jan. 2023.pt_BR
dc.identifier.doihttps://doi.org/10.1590/1678-4685-GMB-2018-0162
dc.identifier.issne- 1676-5680
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/21832
dc.language.isoengpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentInstituto de Ciências Biológicas - ICB (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectMicrosatellitespt_BR
dc.subjectSSRpt_BR
dc.subjectGenetic structurept_BR
dc.subjectGenetic divergencept_BR
dc.subjectHardwoodpt_BR
dc.titleGenetic diversity in populations of African mahogany (Khaya grandioliola C. DC.) introduced in Brazilpt_BR
dc.typeArtigopt_BR

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