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. 2011 Feb 9;11:40. doi: 10.1186/1471-2148-11-40

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Copyright ©2011 Rochet et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Phylogenetic reconstruction of the Alpova lineage (Paxillaceae) based on ITS, showing putative evolutional events in relation with host specificity. Red: species associated with Alnus sect. Alnus. Green: species associated with Alnus sect. Alnobetula. Brown: species associated with alders of both sections. Red star shows putative basal association with Alnus sect. Alnus. Arrows show events of speciation associated with host specificity; red arrow: host-dependent radiation with Alnus subgen. Alnus; green arrow: host shifts from Alnus subgen. Alnus to A. alnobetula.