Abstract

All taxa of Erigeron sect. Conyza are invasive in the Mediterranean basin. Three species, E. bonariensis, E. canadensis, and E. sumatrensis, are the most widespread in Italy, Spain, and Portugal. Based on analysis of the morphological features (the shape and the diameter of inflorescences, the degree of the pubescence of the shoots and leaves), several individuals could not be attributed to any species, since they had intermediate parameters. A hypothesis on the hybridogenic origin of these plants was advanced. The hybridogenic activity of Erigeron sect. Conyza in the secondary distribution range was studied molecular genetically analyzing the ISSR fragments and ITS site of nuclear DNA. All Erigeron invasive species have very low hybridogenic activity, and plants with intermediate traits are not always hybrids.

中文翻译：

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灯眉科的入侵物种。地中海中的Conyza及其杂交活性

摘要

埃里盖隆教派的所有分类单元。Conyza在地中海盆地具有侵入性。在意大利，西班牙和葡萄牙，三种物种，即博纳里肠球菌，加拿大小肠球菌和苏门答腊肠球菌最为广泛。通过分析形态特征（花序的形状和直径，枝和叶的短柔化程度），几个个体不能归因于任何物种，因为它们具有中间参数。提出了关于这些植物的杂交起源的假说。的hybridogenic活动灯盏教派。Conyza在二级分布范围内，研究了分子遗传学分析ISSR片段和核DNA的ITS位点。所有灯盏入侵物种具有非常低hybridogenic活动，并与中间性状的植物并不总是杂种。