High levels of genetic differentiation and selfing in the Brazilian cerrado fruit tree Dipteryx alata Vog. (Fabaceae)

Autor(es)

Tarazi, Roberto ^{[1, 2]} ; Moreno, Maria Andreia ; Gandara, Flavio Bertin ; Ferraz, Elza Martins ; Teixeira Moraes, Mario Luiz ^[3] ; Vinson, Christina Cleo ^[4] ; Ciampi, Ana Yamaguishi ^[4] ; Vencovsky, Roland ^[1] ; Kageyama, Paulo Yoshio

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Genet, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, Dept Ciencias Florestais, Lab Reprod & Genet Especies Arboreas, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba, SP - Brazil

^[3] Univ Estadual Paulista, Dept Fitotecnia Tecnol Alimentos & Socio Econ, Ilha Solteira, SP - Brazil

^[4] Empresa Brasileira Pesquisa Agropecuaria, Embrapa Recursos Genet & Biotecnol, Lab Genet Vegetal, Brasilia, Go - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GENETICS AND MOLECULAR BIOLOGY; v. 33, n. 1, p. 78-85, 2010.
• Citações Web of Science: 12

Resumo

Dipteryx alata is a native fruit tree species of the cerrado (Brazilian savanna) that has great economic potential because of its multiple uses. Knowledge of how the genetic variability of this species is organized within and among populations would be useful for genetic conservation and breeding programs. We used nine simple sequence repeat (SSR) primers developed for Dipteryx odorata to evaluate the genetic structure of three populations of D. alata located in central Brazil based on a leaf sample analysis from 101 adults. The outcrossing rate was evaluated using 300 open-pollinated offspring from 25 seed-trees. Pollen dispersal was measured by parentage analysis. We used spatial genetic structure (SGS) to test the minimal distance for harvesting seeds in conservation and breeding programs. Our data indicate that the populations studied had a high degree of genetic diversity and population structure, as suggested by the high level of divergence among populations . The estimated outcrossing rate suggested a mixed mating system, and the intrapopulation fixation index was influenced by SGS. We conclude that seed harvesting for genetic conservation and breeding programs requires a minimum distance between trees of 196 m to avoid collecting seeds from related seed-trees. (AU)

• Processo FAPESP: 06/59386-1 - Genética e ecologia de Hymenaea stigonocarpa Mart. ex Hayne no Bioma Cerrado do estado de São Paulo
• Beneficiário: Maria Andréia Moreno
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• 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
• Modalidade de apoio: Bolsas no Brasil - Doutorado