Using microsatellite loci, we assessed the mating system and genetic diversity of the dioecious tropical tree Genipa americana in a natural population (NP) and a progeny test (PT). For NP, we also estimated the paternity correlation within and among fruits and mean pollen dispersal distance. As expected for dioecious species, all offspring originated from outcrossing (t = 1). Mating among relatives (1 − ts) and paternity correlation (rp) were variable among progenies (1 − ts = 0.03–0.19; rp = 0.04–0.40), but greater in NP than in PT. Fixation index (F) was generally significant and lower in adults than in offspring, indicating selection against inbred individuals. Paternity correlation was higher within (0.40) than among (0.26) fruits, indicating a lower effective number of pollen donors (Nep) within (2.5) than among (3.8) fruits. Due to the higher rp in NP, the effective size within progenies (Ne) was lower (2.69) than PT (3.27). The pollen dispersal pattern was strongly leptokurtic, suggesting long-distance pollen dispersal (mean of 179 m). The results show that both populations can be used for seed collection in environmental reforestation programmes; however, considering that PT is structured in maternal progenies, NP is more suitable for seed collection due to the lower probability of mating among related trees.

中文翻译：

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估计遗传多样性、交配系统和花粉传播，为美洲金雀花树的异地保护提供信息。

使用微卫星位点，我们评估了雌雄异株热带树的交配系统和遗传多样性美洲栀子在自然种群 (NP) 和后代测试 (PT) 中。对于 NP，我们还估计了果实内部和果实之间的亲子关系以及平均花粉传播距离。正如对雌雄异株物种的预期，所有后代都来自异交（吨= 1)。亲属之间的交配（1 -吨s) 和亲子关系 (rp）在后代中是可变的（1 -吨s= 0.03–0.19；rp= 0.04–0.40），但在 NP 中比在 PT 中更大。固视指数 (F) 在成年人中通常显着且低于后代，表明对近交个体的选择。亲子关系在（0.40）中高于（0.26）果实，表明花粉供体的有效数量较低（ñep) 在 (2.5) 中比在 (3.8) 中。由于较高rp在 NP 中，后代内的有效大小 (ñe) 比 PT (3.27) 低 (2.69)。花粉散布模式是强烈的leptokurtic，表明长距离花粉散布（平均179 m）。结果表明，这两个种群均可用于环境再造林计划中的种子采集；然而，考虑到 PT 是在母系后代中构建的，由于相关树之间的交配概率较低，NP 更适合种子收集。