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The potential role of polyploidy and hybridisation in the further evolution of the highly invasive Fallopia taxa in Europe

机译：多倍体和杂交技术在欧洲高度侵入性的Falopia分类群的进一步发展中的潜在作用

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摘要

Japanese knotweed s.l. comprises Fallopia japonica, F. sachalinensis, F. × bohemica and any F2s or backcrosses. The parental taxa were introduced from the East to the West as garden ornamentals in the nineteenth century, and soon spread beyond the confines of the garden to become widespread and persistent weeds. Since only female F. japonica var. japonica was introduced, its impressive spread has occurred solely by vegetative means. However, the initial lack of genetic variability has been complemented by an extensive series of hybridisations in the adventive range. We examine the history, spread, reproductive biology and ecological impact of these species in the West. The role and importance of polyploidy and hybridisation in their invasion of the West is discussed, as are the implications of these factors for the potential further evolution of the group.
机译：日本虎杖包括日本阔贝（Fallopia japonica），沙棘（F. sachalinensis），波希米亚（B. bohemica）和任何F2或回交。父母的分类单元在19世纪从东方引入到西方作为花园的装饰物，并很快传播到花园之外，成为广泛而持久的杂草。由于只有雌性日本粳稻变种。引进了粳稻，它的广泛传播完全是通过植物来实现的。但是，最初缺乏遗传变异性的方法已经在不定范围内进行了广泛的杂交。我们研究了这些物种在西方的历史，传播，生殖生物学和生态影响。讨论了多倍体和杂交在其入侵西方方面的作用和重要性，以及这些因素对该群体潜在进一步进化的影响。

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