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dc.contributor.authorALVES, R. M.pt_BR
dc.contributor.authorARTERO, A. S.pt_BR
dc.contributor.authorSEBBENN, A. M.pt_BR
dc.contributor.authorFIGUEIRA, A.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2005-06-24pt_BR
dc.date.issued2003pt_BR
dc.identifier.citationGenetics and Molecular Biology, v. 26, n. 3, p. 373-379, 2003.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/406930pt_BR
dc.descriptionThe aim of this research was to study the mating system of a natural population of Theobroma grandiflorum (cupuassu) from Nova Ipixuna, Pará state, using microsatellite markers. Eight polymorphic microsatellite loci were analyzed in eight families, each represented by 10 six-month old seedlings derived from open-pollinated pods. The estimation for the multilocus outcrossing rate ($tm= 1.0) and individual outcrossing rate ($t= 1.0) for this population suggests that T. grandiflorum may be a perfect outbreeding (allogamous) species. Likewise, for the studied population the estimate for single locus outcrossing rate ($ts) was elevated (0.946), but lower than $tm, confirming the likely outcrossing character of the species and suggesting the occurrence of 5.4% biparental inbreeding rate ($tm-$ts). The estimation of genetic divergence ($FST) between allelic frequencies in ovules and pollen revealed a deviation from random mating in 75% of the evaluated loci. Likewise, the estimate of correlation of paternity ($rp= 0.930) and the mean coefficient of co-ancestrality within families ($?xy= 0.501) indicated that the outcrossings were predominantly correlated, and the offspring were full-sibs. These results suggested that for this particular population of T. grandiflorum, the sampling strategy for genetic conservation and breeding should adopt specific models for families derived from correlated outcrossing (full-sibs) and not the ones usually adopted in classic outcrossing species breeding programs (half-sibs).pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPopulação naturalpt_BR
dc.subjectConservação de germoplasmapt_BR
dc.subjectNova Ipixunapt_BR
dc.subjectParápt_BR
dc.subjectBrasilpt_BR
dc.titleMating system in a natural population of Theobroma grandiflorum (Willd. ex Spreng.) Schum., by microsatellite markers.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-11-29T11:11:11Zpt_BR
dc.subject.thesagroCupuaçupt_BR
dc.subject.thesagroGenéticapt_BR
dc.subject.nalthesaurusAmazoniapt_BR
riaa.ainfo.id406930pt_BR
riaa.ainfo.lastupdate2016-11-29pt_BR
dc.contributor.institutionRAFAEL MOYSES ALVES, CPATU; ANGELA S. ARTERO, USP/CENA; ALEXANDRE M. SEBBENN, INSTITUTO FLORESTAL DE SÃO PAULO; ANTONIO FIGUEIRA, USP/CENA.pt_BR
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