Phytophthora alni sp nov and its variants:: designation of emerging heteroploid hybrid pathogens spreading on Alnus trees
Phytophthora alni sp nov and its variants:: designation of emerging heteroploid hybrid pathogens spreading on Alnus trees
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DOI：
10.1017/s0953756204001005
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发表时间：
2004-10-01
影响因子：
--
通讯作者：
Man in't Veld, WA
中科院分区：
文献类型：
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作者：
Brasier, CM;Kirk, SA;Man in't Veld, WA
1993年，在英国发现了一种危害河岸赤杨属树木的新疫霉属病原体，随后在欧洲其他地区也有发现。新疫霉属由一组新出现的异倍体杂种组成，可能是在P. cambivora和一个与P. fragariae相关的物种之间。这些包括一个常见的，近四倍体的标准杂交，推定的异源多倍体;和四个罕见的主要变异类型与染色体数目之间的二倍体和四倍体，命名为瑞典，荷兰，德国和英国的变种。标准杂交类型在此正式命名为Alni Phytophthora subsp. alni。瑞典变种被命名为P. alni subsp. uniformis;和荷兰，德国和英国变种统称为P. alni subsp.多形的荷兰，德国和英国的变种在subsp。非正式地描述了多形。本文讨论了国际植物命名法规中有关挺水种杂种命名的问题及分类学选择的原因。
In 1993 a destructive new Phytophthora pathogen of riparian Alnus trees was discovered in the UK and subsequently shown to be present in other parts of Europe. The new Phytophthora comprised a group of emergent heteroploid hybrids, probably between P. cambivora and a species related to P. fragariae. These included a common, near tetraploid standard hybrid, the presumptive allopolyploid; and four scarcer major variant types with chromosome numbers intermediate between diploid and tetraploid, named the Swedish, Dutch, German and UK variants. The standard hybrid type is formally designated here as Phytophthora alni subsp. alni. The Swedish variant is designated as P. alni subsp. uniformis; and the Dutch, German and UK variants collectively as P. alni subsp. multiformis. The properties of the Dutch, German and UK variants within subsp. multiformis are informally described. The problems of designating emergent species hybrids under the International Code of Botanical Nomenclature and the reasons for the taxonomic choices made are discussed.