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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Edge effects enhance selfing and seed harvesting efforts in the insect-pollinated Neotropical tree Copaifera langsdorffii (Fabaceae)

Texto completo
Autor(es):
Tarazi, R. [1] ; Sebbenn, A. M. [2] ; Kageyama, P. Y. [3] ; Vencovsky, R. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Genet, BR-13418900 Piracicaba, SP - Brazil
[2] Inst Florestal Sao Paulo, Piracicaba, SP - Brazil
[3] Univ Sao Paulo, Dept Ciencias Florestais, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: HEREDITY; v. 110, n. 6, p. 578-585, JUN 2013.
Citações Web of Science: 13
Resumo

Edge effects may affect the mating system of tropical tree species and reduce the genetic diversity and variance effective size of collected seeds at the boundaries of forest fragments because of a reduction in the density of reproductive trees, neighbour size and changes in the behaviour of pollinators. Here, edge effects on the genetic diversity, mating system and pollen pool of the insect-pollinated Neotropical tree Copaifera langsdorffii were investigated using eight microsatellite loci. Open-pollinated seeds were collected from 17 seed trees within continuous savannah woodland (SW) and were compared with seeds from 11 seed trees at the edge of the savannah remnant. Seeds collected from the SW had significantly higher heterozygosity levels (H-o = 0.780; H-e = 0.831) than seeds from the edge (H-o = 0.702; H-e = 0.800). The multilocus outcrossing rate was significantly higher in the SW (t(m) = 0.859) than in the edge (t(m) = 0.759). Pollen pool differentiation was significant, however, it did not differ between the SW (Phi(ft)'' = 0.105) and the edge (Phi(ft)'' = 0.135). The variance effective size within the progenies was significantly higher in the SW (N-e = 2.65) than at the edge (N-e = 2.30). The number of seed trees to retain the reference variance effective size of 500 was 189 at the SW and 217 at the edge. Therefore, it is preferable that seed harvesting for conservation and environmental restoration strategies be conducted in the SW, where genetic diversity and variance effective size within progenies are higher. (AU)

Processo FAPESP: 06/04490-9 - Diversidade genética, estrutura genética espacial, sistema de reprodução e fluxo gênico em uma população de Copaifera langsdorffii Desf. no cerrado
Beneficiário:Roberto Tarazi
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 07/06648-1 - Estrutura genética e sistema reprodutivo de espécies arbóreas do cerrado do estado de São Paulo
Beneficiário:Paulo Yoshio Kageyama
Linha de fomento: Auxílio à Pesquisa - Regular