Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055132
Research center of Embrapa/Collection: Embrapa Acre - Artigo em periódico indexado (ALICE)
Date Issued: 2015
Type of Material: Artigo em periódico indexado (ALICE)
Authors: 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.
Additional Information: 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.
Title: Mating system variation among populations, individuals and within and among fruits in Bertholletia excelsa.
Publisher: Silvae Genetica, Deutschland, v. 64, p. 5-6, 2015.
Language: en
Keywords: Castanha do brasil
Ação antrópica
Marcador microssatélite
Embrapa Acre
Rio Branco (AC)
Acre
Amazônia Ocidental
Western Amazon
Amazonia Occidental
Embrapa Recursos Genéticos e Biotecnologia
Mato Grosso
Actividades antropogénicas
Fitomejoramiento
Madera tropical
Marcadores genéticos
Nuez del Brasil
Repeticiones de microsatélite.
Polinización
Description: 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.
Thesagro: Melhoramento genético vegetal
Reprodução vegetal
Essência florestal
Castanha do pará
Bertholletia excelsa
População de planta
Polinização
Marcador genético
Campo Experimental
Flora.
NAL Thesaurus: Plant breeding
Tropical wood
Brazil nuts
Pollination
Anthropogenic activities
Genetic markers
Microsatellite repeats.
Data Created: 2016-10-20
ISSN: 0037-5349
Appears in Collections:Artigo em periódico indexado (CPAF-AC)

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