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Registro Completo |
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Biblioteca(s): |
Embrapa Agrossilvipastoril; Embrapa Rondônia. |
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Data corrente: |
21/12/2016 |
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Data da última atualização: |
07/03/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WADT, L. H. de O.; BALDONI, A. B.; SILVA, V. S.; CAMPOS, T. de; MARTINS, K.; AZEVEDO, V. C. R.; MATA, L. R. da; BOTIN, A. A.; HOOGERHEIDE, E. S. S.; TONINI, H.; SEBBENN, A. M. |
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Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-Rondonia; AISY BOTEGA BALDONI TARDIN, CPAMT; Universidade Federal do Acre; TATIANA DE CAMPOS, CPAF-Acre; Universidade Federal de São Carlos; VANIA CRISTINA RENNO AZEVEDO, Cenargen; LORENA RAMOS DA MATA, Cenargen; Universidade Federal de Mato Grosso; EULALIA SOLER SOBREIRA HOOGERHEIDE, CPAMT; HELIO TONINI, CPAMT; Instituto Florestal de São Paulo. |
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Título: |
Mating system variation among populations, individuals and within and among fruits in Bertholletia excelsa. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Silvae Genetica, Deutschland, v. 64, p. 5-6, 2015. |
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Idioma: |
Português |
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Conteúdo: |
The aim of this study was to investigate variation in mating system among three Brazilian Amazon populations of the tree Bertholletia excelsa with different levels of anthropogenic interventions. We collected open-pollinated seeds from one natural population, remnant trees dispersed in a pasture, and trees from a plantation. Outcrossing rate not varied among the populations and indicates that all seeds were originated from outcrossing (tm=1.0). Mating among relatives was significant higher in the plantation than forest and pasture populations,
probably due the fact that many trees are related in the plantation. Correlated mating was significantly higher in pasture (rp=0.47) and plantation (rp=0.51) than in the natural population (rp=0.22), suggesting that trees in natural population are pollinated by a higher number of pollen donors. The paternity correlation was significantly higher within (rp(w)=0.41) than among fruits (rp(a)=0.18), showing a higher probability to find full-sibs within than among fruits. The fixation index was generally lower in seed trees than in their seedlings, suggesting selection for heterozygous individuals from seedling to adult stages. Progeny arrays collected from the natural population had a lower proportion of pairwise full-sibs than in pasture and plantation and higher variance effective size (2.75) than trees in pasture (2.15) and plantations (2.22). Results highlight that seed collections for conservation, breeding and reforestation programs preferentially should be carried out in natural populations due low proportion highest variance effective size within progeny. MenosThe aim of this study was to investigate variation in mating system among three Brazilian Amazon populations of the tree Bertholletia excelsa with different levels of anthropogenic interventions. We collected open-pollinated seeds from one natural population, remnant trees dispersed in a pasture, and trees from a plantation. Outcrossing rate not varied among the populations and indicates that all seeds were originated from outcrossing (tm=1.0). Mating among relatives was significant higher in the plantation than forest and pasture populations,
probably due the fact that many trees are related in the plantation. Correlated mating was significantly higher in pasture (rp=0.47) and plantation (rp=0.51) than in the natural population (rp=0.22), suggesting that trees in natural population are pollinated by a higher number of pollen donors. The paternity correlation was significantly higher within (rp(w)=0.41) than among fruits (rp(a)=0.18), showing a higher probability to find full-sibs within than among fruits. The fixation index was generally lower in seed trees than in their seedlings, suggesting selection for heterozygous individuals from seedling to adult stages. Progeny arrays collected from the natural population had a lower proportion of pairwise full-sibs than in pasture and plantation and higher variance effective size (2.75) than trees in pasture (2.15) and plantations (2.22). Results highlight that seed collections for conservation, breeding and reforestation programs ... Mostrar Tudo |
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Palavras-Chave: |
Castanheira. |
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Thesagro: |
Acasalamento; Bertholletia Excelsa; Polinização; Reprodução. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/149054/1/26156.pdf
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Marc: |
LEADER 02495naa a2200301 a 4500
001 2059096
005 2017-03-07
008 2015 bl --- 0-- u #d
100 1 $aWADT, L. H. de O.
245 $aMating system variation among populations, individuals and within and among fruits in Bertholletia excelsa.$h[electronic resource]
260 $c2015
520 $aThe aim of this study was to investigate variation in mating system among three Brazilian Amazon populations of the tree Bertholletia excelsa with different levels of anthropogenic interventions. We collected open-pollinated seeds from one natural population, remnant trees dispersed in a pasture, and trees from a plantation. Outcrossing rate not varied among the populations and indicates that all seeds were originated from outcrossing (tm=1.0). Mating among relatives was significant higher in the plantation than forest and pasture populations, probably due the fact that many trees are related in the plantation. Correlated mating was significantly higher in pasture (rp=0.47) and plantation (rp=0.51) than in the natural population (rp=0.22), suggesting that trees in natural population are pollinated by a higher number of pollen donors. The paternity correlation was significantly higher within (rp(w)=0.41) than among fruits (rp(a)=0.18), showing a higher probability to find full-sibs within than among fruits. The fixation index was generally lower in seed trees than in their seedlings, suggesting selection for heterozygous individuals from seedling to adult stages. Progeny arrays collected from the natural population had a lower proportion of pairwise full-sibs than in pasture and plantation and higher variance effective size (2.75) than trees in pasture (2.15) and plantations (2.22). Results highlight that seed collections for conservation, breeding and reforestation programs preferentially should be carried out in natural populations due low proportion highest variance effective size within progeny.
650 $aAcasalamento
650 $aBertholletia Excelsa
650 $aPolinização
650 $aReprodução
653 $aCastanheira
700 1 $aBALDONI, A. B.
700 1 $aSILVA, V. S.
700 1 $aCAMPOS, T. de
700 1 $aMARTINS, K.
700 1 $aAZEVEDO, V. C. R.
700 1 $aMATA, L. R. da
700 1 $aBOTIN, A. A.
700 1 $aHOOGERHEIDE, E. S. S.
700 1 $aTONINI, H.
700 1 $aSEBBENN, A. M.
773 $tSilvae Genetica, Deutschland$gv. 64, p. 5-6, 2015.
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Registro original: |
Embrapa Agrossilvipastoril (CPAMT) |
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