The presence of hybrid genotypes resulting from the mating of native and invasive species poses numerous problems to invasive species managers, including initial difficulty in hybrid detection, unpredictable ecological impacts to recipient ecosystems, and variability in response to management actions. We conducted a molecular study of internal transcribed spacer sequences to determine whether hybridization has occurred between the North American macrophyte Nymphoides aquatica and the invasive N. cristata where their distributions overlap in the southeastern United States (US). A hybrid N. aquatica × N. cristata population was detected within Lake Moultrie, in South Carolina. Given the broad geographic overlap in the distributions of N. aquatica and N. cristata in the southeastern US, and previously documented hybridization between the natives N. aquatica and N. cordata, additional monitoring for hybrid populations throughout the introduced range is strongly suggested. At a minimum, hybrid monitoring should take place in the nine counties of three states where both species are documented. Here, we discuss next steps to better characterize genetic diversity within hybrid Nymphoides populations and the potential management implications.

由原生物种和入侵物种交配产生的杂交基因型的存在给入侵物种管理人员带来了许多问题，包括杂交检测的最初困难，对受体生态系统的不可预测的生态影响以及响应管理措施的可变性。我们对内部转录的间隔区序列进行了分子研究，以确定是否在北美大型植物Nymphoides aquatica和入侵的N. cristata之间发生了杂交，它们的分布在美国东南部（美国）重叠。一种混合N.菜类 ×  N.鸡冠花人口莫尔特里湖内检测，在南卡罗来纳州。鉴于地理分布的广泛重叠N. aquatica和N. cristata位于美国东南部，并且先前有文献记载了本地N. aquatica和N. cordata之间的杂交，强烈建议在引入的整个范围内对杂交种群进行额外监测。至少应在两个州都有记录的三个州的九个县进行混合监测。在这里，我们讨论了下一步措施，以更好地表征杂种夜蛾种群内的遗传多样性及其潜在的管理意义。