Araujo F L, Siqueira M V B M, Grando C, Viana J P G, Pinheiro J B, Alves-Pereira A, Campos J B, Brancalion P H S, Zucchi M I
Centro de Recursos Genéticos Vegetais, Instituto Agronômico, Campinas, SP, Brasil
Universidade do Sagrado Coração, Bauru, SP, Brasil.
Genet Mol Res. 2017 Jan 23;16(1):gmr-16-01-gmr.16019105. doi: 10.4238/gmr16019105.
Guaçatonga (Casearia sylvestris) is a native plant of the Atlantic Forest, with high medicinal potential and relevance for reforestation programs. The aim of this study was to characterize, with microsatellite markers, two populations of C. sylvestris from remaining areas of the Atlantic Forest in the State of São Paulo. High allelic variation was found in both populations (N = 101 and 117; A = 12.5 and 14.4), although with high endogamy coefficients (f = 0.640 and 0.363). Estimates of genetic structure suggested the presence of considerable genetic divergence between the populations (F = 0.103); however, there was no spatial genetic structure within the populations. Genetic divergence may have occurred due to decreased gene flow between the fragmented populations as the result of deforestation. The results of this study demonstrate the importance of genetic diversity and its characterization in native plants within remaining forest areas for the management and restoration of such areas.
瓜卡托尼亚（南美桤木）是一种原产于大西洋森林的植物，具有很高的药用潜力，对造林计划也很重要。本研究的目的是利用微卫星标记对圣保罗州大西洋森林剩余区域的两个南美桤木种群进行特征分析。在两个种群中均发现了较高的等位基因变异（N = 101和117；A = 12.5和14.4），尽管其近交系数较高（f = 0.640和0.363）。遗传结构估计表明种群之间存在相当大的遗传分化（F = 0.103）；然而，种群内部不存在空间遗传结构。由于森林砍伐导致碎片化种群之间的基因流动减少，可能发生了遗传分化。本研究结果证明了遗传多样性及其在剩余森林区域本土植物中的特征分析对于这些区域的管理和恢复的重要性。
