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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
24/06/2005 |
Data da última atualização: |
29/11/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALVES, R. M.; ARTERO, A. S.; SEBBENN, A. M.; FIGUEIRA, A. |
Afiliação: |
RAFAEL MOYSES ALVES, CPATU; ANGELA S. ARTERO, USP/CENA; ALEXANDRE M. SEBBENN, INSTITUTO FLORESTAL DE SÃO PAULO; ANTONIO FIGUEIRA, USP/CENA. |
Título: |
Mating system in a natural population of Theobroma grandiflorum (Willd. ex Spreng.) Schum., by microsatellite markers. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Genetics and Molecular Biology, v. 26, n. 3, p. 373-379, 2003. |
Idioma: |
Inglês |
Conteúdo: |
The 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). MenosThe 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 bree... Mostrar Tudo |
Palavras-Chave: |
Brasil; Conservação de germoplasma; Nova Ipixuna; Pará; População natural. |
Thesagro: |
Cupuaçu; Genética. |
Thesaurus Nal: |
Amazonia. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/18122/1/a25v26n3.pdf
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Marc: |
LEADER 02250naa a2200253 a 4500 001 1406930 005 2016-11-29 008 2003 bl uuuu u00u1 u #d 100 1 $aALVES, R. M. 245 $aMating system in a natural population of Theobroma grandiflorum (Willd. ex Spreng.) Schum., by microsatellite markers. 260 $c2003 520 $aThe aim of this research was to study the mating system of a natural population of Theobroma grandiflorum (cupuassu) from Nova Ipixuna, Pará state, using microsatellite markers. Eight polymorphic microsatellite loci were analyzed in eight families, each represented by 10 six-month old seedlings derived from open-pollinated pods. The estimation for the multilocus outcrossing rate ($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). 650 $aAmazonia 650 $aCupuaçu 650 $aGenética 653 $aBrasil 653 $aConservação de germoplasma 653 $aNova Ipixuna 653 $aPará 653 $aPopulação natural 700 1 $aARTERO, A. S. 700 1 $aSEBBENN, A. M. 700 1 $aFIGUEIRA, A. 773 $tGenetics and Molecular Biology$gv. 26, n. 3, p. 373-379, 2003.
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Embrapa Amazônia Oriental (CPATU) |
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12. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | SILVA, É. L.; ALVES, R. M.; ALBUQUERQUE, P. S. B.; SEBBENN, A. M. Diversidade genética entre clones de cupuaçuzeiro com o uso de marcadores moleculares do tipo microssatélites. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA UFRA, 6.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL (AVALIAÇÃO - 2008), 12., 2008, Belém, PA. A importância da iniciação científica para a pós-graduação: anais. Belém, PA: UFRA: Embrapa Amazônia Oriental, 2008. Programa Institucional de Bolsas de Iniciação Científica (PIBIC). Disponível também on-line.Tipo: Artigo em Anais de Congresso / Nota Técnica |
Biblioteca(s): Embrapa Amazônia Oriental. |
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19. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | CAMBUIM, J.; AGUIAR, A. V. de; ZARUMA, D.; MORAES, M.; FREITAS, M.; SEBBENN, A. Sex ratio and status number in progenies test of dioecious tree species. The International Forestry Review, v. 16, n. 5, p. 375, 2014. Edição dos abstracts do 24º IUFRO World Congress, 2014, Salt Lake City. Sustaining forests, sustaining people: the role of research.Tipo: Resumo em Anais de Congresso |
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