Despite their putative invasive potential, Miscanthus taxa have been increasingly viewed as promising crops for bioenergy production. Miscanthus x giganteus is cultivated worldwide due to its high productivity, and its non‐spreading growth limits its risk of invasion. However, the genetic uniformity of its unique cultivated clone has recently been questioned. We used morphometry, nuclear microsatellites, AFLP fingerprints and nrDNA ITS barcoding to assess Miscanthus genotypes cultivated in eastern France. As expected, the globally cultivated clone was the main morphotype and genotype of our samplings; however, we also identified a second genotype, assigned to M. sacchariflorus, in the sampled fields. Morphological differentiation partially overlaps genotypic assignation, probably due to disturbance at the crop edges. We also show that Miscanthus taxa are misidentified in commercial nurseries. Our study confirms previous reports of the occurrence of other accessions in fields of M. x giganteus. These taxonomic confusions limit the certainty that a single clone of M. x giganteus is cultivated. In this context, M. x giganteus crop fields may actually promote the dispersal of invasive Miscanthus taxa.

中文翻译：

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Miscanthus x giganteus作物田隐藏了入侵型M. sacchariflorus的基因型

尽管具有潜在的入侵潜力，芒草分类单元已被越来越多地视为有前途的生物能源生产作物。芒草（Miscanthus  x  giganteus）因其高生产力而在世界范围内种植，其未蔓延的生长限制了其入侵的风险。然而，最近有人质疑其独特栽培克隆的遗传一致性。我们使用形态计量学，核微卫星，AFLP指纹图谱和nrDNA ITS条形码对法国东部种植的芒草基因型进行了评估。不出所料，全球种植的克隆是我们样本的主要形态和基因型。但是，我们还鉴定了第二个基因型，即糖化分枝杆菌，在采样字段中。形态分化部分重叠基因型分配，这可能是由于作物边缘的干扰所致。我们还表明，在商业苗圃中误认了芒草分类单元。我们的研究证实了先前报道的M领域其他种质的发生。x  giganteus。这些分类上的混乱限制了M的单个克隆的确定性。x  giganteus被种植。在这种情况下，M。x  giganteus作物田实际上可能促进入侵性芒草分类单元的扩散。