caa a22 4500 475807162 CHVBK 20180406123750.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/BF00985048 doi (NATIONALLICENCE)springer-10.1007/BF00985048 Incongruent phylogeographies in spite of similar morphology, ecology, and distribution: Phippsia algida and P. concinna (Poaceae) in the North Atlantic region [Elektronische Daten] [Erik Ares, Minna Nurminiemi, Christian Brochmann] Phylogeographic and taxonomic relationships among 54 North Atlantic populations of the snowbed grass genusPhippsia were investigated based on isozymes and genetically based morphological variation. The results support recognition of two distinct species,P. algida andP. concinna, the latter with at least two subspecies. Both of these self-fertilizing arctic pioneer species were genetic allotetraploids almost without intrapopulational variation. The two species showed strikingly different phylogeographies in the North Atlantic region in spite of their similarity in morphology, habitat ecology, mating system, and dispersal ecology, and in spite of their present cooccurrence in many geographic areas, sometimes even in the same snowbeds. The same electrophoretic multilocus phenotype was observed in all populations ofP. algida, and although this species showed considerable morphological variation, the variation was unstructured geographically. Thus,P. algida showed a pattern similar to other arctic species investigated in the North Atlantic region; it has probably dispersed postglacially across the sea barriers among Greenland, Svalbard, Iceland, and Scandinavia. In contrast,P. concinna was virtually fixed for different multilocus phenotypes in the three main geographic areas analyzed (S Norway, Svalbard, Greenland), corresponding to fairly distinct divergence in morphology. This pattern suggests absence of postglacial among-area dispersal ofP. concinna in spite of all of its similarities with its congener; it may have immigrated to the North Atlantic from different source areas and/or survived the last glaciationin situ. Springer-Verlag, 2000 Phippsia algida nationallicence P. concinna nationallicence Poaceae nationallicence Phylogeography nationallicence isozyme analysis nationallicence genetic allopolyploidy nationallicence common garden experiment nationallicence morphometry nationallicence North Atlantic region nationallicence Ares Erik Dept. of Biology and Nature Conservation, Agricultural University of Norway, P. O. Box 5014, N-1432, Ås, Norway aut Nurminiemi Minna Dept. of Chemistry and Biotechnology, Agricultural University of Norway, P. O. Box 5040, N-1432, Ås, Norway aut Brochmann Christian Botanical Garden and Museum, University of Oslo, Trondheimsveien 23 B, N-0562, Oslo, Norway aut Plant Systematics and Evolution Springer-Verlag 220/3-4(2000-09-01), 241-261 0378-2697 220:3-4<241 2000 220 606 https://doi.org/10.1007/BF00985048 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985048 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ares Erik Dept. of Biology and Nature Conservation, Agricultural University of Norway, P. O. Box 5014, N-1432, Ås, Norway aut NATIONALLICENCE 700 1- Nurminiemi Minna Dept. of Chemistry and Biotechnology, Agricultural University of Norway, P. O. Box 5040, N-1432, Ås, Norway aut NATIONALLICENCE 700 1- Brochmann Christian Botanical Garden and Museum, University of Oslo, Trondheimsveien 23 B, N-0562, Oslo, Norway aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 220/3-4(2000-09-01), 241-261 0378-2697 220:3-4<241 2000 220 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer