<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Clive M. Brasier</style></author><author><style face="normal" font="default" size="100%">Kirk, S.A.</style></author><author><style face="normal" font="default" size="100%">Jose Delcan</style></author><author><style face="normal" font="default" size="100%">David E.L. Cooke</style></author><author><style face="normal" font="default" size="100%">Thomas Jung</style></author><author><style face="normal" font="default" size="100%">Man In’t Veld, W.A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Phytophthora alni sp. nov. and its variants: designation of emerging heteroploid hybrid pathogens spreading on Alnus trees</style></title><secondary-title><style face="normal" font="default" size="100%">Mycological Research</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1017/S0953756204001005</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">10</style></number><volume><style face="normal" font="default" size="100%">108</style></volume><pages><style face="normal" font="default" size="100%">1172-1184</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In 1993 a destructive new &lt;em&gt;Phytophthora&lt;/em&gt; pathogen of riparian &lt;em&gt;Alnus&lt;/em&gt; trees was discovered in the UK and subsequently shown to be present in other parts of Europe. The new &lt;em&gt;Phytophthora&lt;/em&gt; comprised a group of emergent heteroploid hybrids, probably between &lt;em&gt;P. cambivora&lt;/em&gt; and a species related to &lt;em&gt;P. fragariae.&lt;/em&gt; 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 &lt;em&gt;Phytophthora alni&lt;/em&gt; subsp. &lt;em&gt;alni.&lt;/em&gt; The Swedish variant is designated as &lt;em&gt;P. alni&lt;/em&gt; subsp. &lt;em&gt;uniformis&lt;/em&gt;; and the Dutch, German and UK variants collectively as &lt;em&gt;P. alni&lt;/em&gt; subsp. &lt;em&gt;multiformis.&lt;/em&gt; The properties of the Dutch, German and UK variants within subsp. &lt;em&gt;multiformis&lt;/em&gt; 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.&lt;/p&gt;</style></abstract></record></records></xml>