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首页> 外文期刊>Biotropica >Fine-scale spatial genetic structure of ten dipterocarp tree species in a Bornean rain forest. (Special Section: Advances in dipterocarp ecology and conservation biology.)
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Fine-scale spatial genetic structure of ten dipterocarp tree species in a Bornean rain forest. (Special Section: Advances in dipterocarp ecology and conservation biology.)

机译：婆罗洲雨林中十个七叶树种的精细尺度空间遗传结构。 （特别部分：罗汉果生态学和保护生物学的进展。）

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摘要

Fine-scale spatial genetic structure is increasingly recognized as an important factor in the studies of tropical forest trees as it influences genetic diversity of local populations. The biologic mechanisms that generate fine-scale spatial genetic structure are not fully understood. We studied fine-scale spatial genetic structure in ten coexisting dipterocarp tree species in a Bornean rain forest using microsatellite markers. Six of the ten species showed statistically significant fine-scale spatial genetic structure. Fine-scale spatial genetic structure was stronger at smaller spatial scales (<=100 m) than at larger spatial scales (>100 m) for each species. Multiple regression analysis suggested that seed dispersal distance was important at the smaller spatial scale. At the larger scale (> 100 m) and over the entire sample range (0-1000 m), pollinators and spatial distribution of adult trees were more important determinants of fine-scale spatial genetic structure. Fine-scale spatial genetic structure was stronger in species pollinated by less mobile small beetles than in species pollinated by the more mobile giant honeybee (Apis dorsata). It was also stronger in species where adult tree distributions were more clumped. The hypothesized mechanisms underlying the negative correlation between clump size and fine-scale spatial genetic structure were a large overlap among seed shadows and genetic drift within clumped species.
机译：精细尺度的空间遗传结构已成为热带林木研究的重要因素，因为它影响当地居民的遗传多样性。产生精细尺度的空间遗传结构的生物学机制尚未完全了解。我们使用微卫星标记研究了婆罗洲雨林中十种并存的龙脑树物种的精细尺度空间遗传结构。十个物种中的六个显示出统计学上显着的精细尺度空间遗传结构。对于每个物种，较小规模的空间尺度（<= 100 m）的精细尺度空间遗传结构要强于较大的空间尺度（> 100 m）。多元回归分析表明，种子散布距离在较小的空间尺度上很重要。在更大的规模（> 100 m）和整个样本范围（0-1000 m）上，成年树的授粉媒介和空间分布是更精细的空间遗传结构的重要决定因素。流动性较小的小甲虫授粉的物种的精细尺度空间遗传结构要强于流动性较大的蜜蜂（Apis dorsata）授粉的物种。在成年树的分布更集中的物种中，它也更强。团块大小与精细尺度空间遗传结构之间负相关的假设机制是，种子阴影和团簇物种内的遗传漂移之间存在很大的重叠。

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