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外文期刊>Nordic Journal of Botany
>Are linear-leaved Potamogeton hybrids really so rare? Molecular evidence for multiple hybridizations between P. acutifolius and P. compressus in central Europe
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Are linear-leaved Potamogeton hybrids really so rare? Molecular evidence for multiple hybridizations between P. acutifolius and P. compressus in central Europe
Due to insufficient morphological differentiation, hybridization among linear-leaved species of Potamogeton is rarely observed and recognized. Here, we applied molecular tools (sequencing of nrITS and rpl32-trnL cpDNA intergenic spacer) to study several natural, central European populations of morphologically intermediate forms between two closely related species, P. acutifolius and P. compressus, to examine their taxonomical status and test whether they represented the variation range of the species or are results of interspecific hybridization. Both DNA regions provided distinguishing characters between putative parental species. The ITS sequences from all the morphologically intermediate specimens displayed an additive pattern combining the variation of both parental species, providing evidence for the hybrid origin of all these plants. This case study suggests that hybrids of linear-leaved Potamogeton species are more common than usually believed, but have been difficult to identify without molecular tools.
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机译：由于形态分化,不足linear-leaved物种之间的杂交Potamogeton很少观察和认识。在这里,我们应用分子工具(测序nrITS和rpl32-trnL cpDNA基因间的间隔)研究几种自然,欧洲中部种群的形态中间形式两个密切相关的物种,P。acutifolius p . compressus,审视自己和测试他们是否分类地位代表物种的变化范围是种间杂交的结果。DNA区域提供有区别的字符假定的亲代物种之间。序列的形态中间标本显示一种添加剂结合两个家长的变化模式物种,为混合起源提供证据所有的这些植物。混合动力车的linear-leaved Potamogeton物种比通常认为的更为普遍,但没有分子很难辨认工具。
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