| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Mating system parameters in a high density population of andirobas in the Amazon forest
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| Autores: |
Campos,Tatiana de
Cunha,Marcia Oliveira da
Sousa,Adna Cristina Barbosa de
Teixeira,Renata Beltrão
Raposo,Andrea
Sebbenn,Alexandre Magno
Wadt,Lucia Helena de Oliveira
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| Data: |
2013-05-01
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| Ano: |
2013
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| Palavras-chave: |
Carapa guianensis
Allogamy
Conservation
Genetic breeding
Microsatellite
Population size
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| Resumo: |
The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models. Twelve open‑pollinated progeny arrays of 15 individuals were sampled in an area with C. guianensis estimated density of 25.7 trees per hectare. Overall, the species has a mixed reproductive system, with a predominance of outcrossing. The multilocus outcrossing rate (t m = 0.862) was significantly lower than the unity, indicating that self‑pollination occurred. The rate of biparental inbreeding was substantial (t m ‑ t s = 0.134) and significantly different from zero. The correlation of selfing within progenies was high (r s = 0.635), indicating variation in the individual outcrossing rate. Consistent with this result, the estimate of the individual outcrossing rate ranged from 0.598 to 0.978. The multilocus correlation of paternity was low (r p(m) = 0.081), but significantly different from zero, suggesting that the progenies contain full‑sibs. The coancestry within progenies (Θ = 0.185) was higher and the variance effective size (Ne(v) = 2.7) was lower than expected for true half‑sib progenies (Θ = 0.125; Ne(v) = 4). These results suggest that, in order to maintain a minimum effective size of 150 individuals for breeding, genetic conservation, and environmental reforestation programs, seeds from at least 56 trees must be collected.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500006
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2013000500006
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.48 n.5 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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