Paternity analysis, pollen flow, and spatial genetic structure of a natural population of Euterpe precatoria in the Brazilian Amazon

Autor(es)

Ferreyra Ramos, Santiago Linorio ^[1] ; Dequigiovanni, Gabriel ^[2] ; Sebbenn, Alexandre Magno ^[3] ; Gomes Lopes, Maria Teresa ^[4] ; Vasconcelos de Macedo, Jeferson Luis ^[5] ; Veasey, Elizabeth Ann ^[2] ; Alves-Pereira, Alessandro ^[2] ; da Silva, Perla Pimentel ^[6] ; Garcia, Jose Nivaldo ^[7] ; Kageyama, Paulo Yoshio ^[7]

Afiliação do(s) autor(es)

^[1] Univ Fed Amazonas, Inst Ciencias Exatas & Tecnol, Itacoatiara, AM - Brazil

^[2] Univ Sao Paulo, ESALQ, Dept Genet, Piracicaba, SP - Brazil

^[3] Inst Florestal Sao Paulo, Secao Melhoramento & Conservacao Genet Florestal, Sao Paulo, SP - Brazil

^[4] Univ Fed Amazonas, Fac Ciencias Agr, Manaus, AM - Brazil

^[5] Embrapa Amazonia Ocidental, Manaus, AM - Brazil

^[6] Univ Estadual Paulista, Inst Pesquisa Bioenergia, Rio Claro, SP - Brazil

^[7] Univ Sao Paulo, ESALQ, Dept Ciencias Florestais, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOLOGY AND EVOLUTION; v. 8, n. 22, p. 11143-11157, NOV 2018.
• Citações Web of Science: 0

Resumo

Euterpe precatoria, known as acai do Amazonas, is a regionally important palm of the Amazon rainforest for the fruit production through extractive agriculture. Little information is available with regard to genetic diversity, gene flow, and spatial genetic structure (SGS) of acai populations, which are essential for the use, management, and conservation of genetic resources of the species. This research aimed to assess the genetic diversity, inbreeding level, SGS, and gene flow in four ontogenetic stages of a natural E. precatoria population in the Brazilian Amazon, based on 18 microsatellite loci. The study was carried out in a natural population dispersed in an area of about 10 ha. Leaf tissues of 248 plants were mapped and sampled and classified into four ontogenetic stages: reproductive (59), immature (70), young (60), and seedling (59). Genetic diversity indices were high for all ontogenetic stages. The fixation index (F) for all ontogenetic stages was not significantly different from zero, indicating the absence of inbreeding. A significant SGS was found for all ontogenetic stages (68-110 m), indicating seed dispersal over short distances. Paternity analysis detected pollen immigration of 39.1%, a selfing rate of 4.2%, and a mean pollen dispersal distance within the population of 531 m. The results indicate substantial allele input in the population via pollen immigration, contributing to the maintenance of the genetic diversity of the population. However, within a population, the renewal with new progenies selected from seed plants spaced at least 110 m apart is important to avoid collecting seeds from related plants. (AU)

• Processo FAPESP: 14/10947-8 - Diversidade e estrutura genética, fluxo gênico e sistema reprodutivo de Euterpe precatoria Mart. em populações naturais na Amazônia, nos estados do Acre, Roraima e Amazonas, por meio de marcadores microssatélites
• Beneficiário: Santiago Linorio Ferreyra Ramos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado