Two subspecies of common reed (Phragmites australis; Poaceae) exist in northern North America: the native P. australis subsp. americanus and the introduced P. australis subsp. australis. There are numerous native populations in Wisconsin, in addition to the more recently established populations of the introduced subspecies. We studied populations of both P. australis subspecies across Wisconsin in order to characterize the genetic diversity of both subspecies and to investigate whether any instances of hybridization could be ascertained in Wisconsin. Using eight microsatellite markers, we found minimal overlap in the alleles that could be recovered from native and introduced plants, and we found no evidence to suggest hybridization between subspecies, even in localities where native and introduced plants grow in close proximity. Overall, we found greater genetic variation in plants of the introduced subspecies relative to the native subspecies, and we observed some geographic patterns of allelic diversity.

中文翻译：

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威斯康星州本地和引进芦苇（普通芦苇）的遗传多样性

北美洲北部存在两种普通芦苇（芦苇；禾本科）亚种：原生芦苇亚种。americanus 和引入的 P. australis subsp。澳大利亚。除了最近建立的引入亚种的种群外，威斯康星州还有许多本地种群。我们研究了威斯康星州的两个 P. australis 亚种的种群，以表征两个亚种的遗传多样性，并调查是否可以在威斯康星州确定任何杂交实例。使用八个微卫星标记，我们发现可以从原生植物和引入植物中恢复的等位基因的重叠最小，并且我们没有发现任何证据表明亚种之间存在杂交，即使在原生植物和引入植物非常接近的地方也是如此。全面的，