Paternity analysis reveals significant isolation and near neighbor pollen dispersal in small Cariniana legalis Mart. Kuntze populations in the Brazilian Atlantic Forest

Autor(es)

Tambarussi, Evandro V. ^[1] ; Boshier, David ^[2] ; Vencovsky, Roland ^[1] ; Freitas, Miguel L. M. ^[3] ; Sebbenn, Alexandre M. ^[3]

Afiliação do(s) autor(es)

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

^[2] Dept Plant Sci, Oxford OX1 3RB - England

^[3] Inst Florestal Sao Paulo, BR-01059970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOLOGY AND EVOLUTION; v. 5, n. 23, p. 5588-5600, DEC 2015.
• Citações Web of Science: 9

Resumo

Throughout the world, large trees are increasingly rare. Cariniana legalis is the tallest tree species of the Brazilian Atlantic Forest, reaching up to 60m in height. Due to extensive deforestation of the Atlantic Forest, remnant C. legalis populations are small and spatially isolated, requiring the development of strategies for their conservation. For insitu and ex situ genetic conservation to be effective, it is important to understand the levels and patterns of spatial genetic structure (SGS), and gene flow. We investigated SGS and pollen flow in three small, physically isolated C. legalis stands using microsatellite loci. We measured, mapped, and sampled all C. legalis trees in the three stands: 65 trees from Ibicatu population, 22 trees from MGI, and 4 trees from MGII. We also collected and genotyped 600 seeds from Ibicatu, 250 seeds from MGI, and 200 seeds from MGII. Significant SGS was detected in Ibicatu up to 150m, but substantial levels of external pollen flow were also detected in Ibicatu (8%), although not in MGI (0.4%) or MGII (0%). Selfing was highest in MGII (18%), the smallest group of trees, compared to MGI (6.4%) and Ibicatu (6%). In MGI and MGII, there was a strong pattern of mating among near-neighbors. Seed collection strategies for breeding, insitu and ex situ conservation and ecological restoration, must ensure collection from seed trees located at distances greater than 350m and from several forest fragments. (AU)

• Processo FAPESP: 10/10704-7 - Fluxo gênico contemporâneo, sistema de cruzamento e distribuição espacial de genótipos em população fragmentada de jequitibá-rosa (Cariniana legalis Mart. Kuntze) por marcadores microssatélites e análise de parentesco
• Beneficiário: Alexandre Magno Sebbenn
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/12354-3 - Fluxo gênico contemporâneo, sistema de reprodução e estrutura espacial de genótipos em população fragmentada de jequitibá-rosa (Cariniana legalis Mart. O. Kuntze) utilizando marcadores microssatélites.
• Beneficiário: Evandro Vagner Tambarussi
• Modalidade de apoio: Bolsas no Brasil - Doutorado