caa a22 4500 475807235 CHVBK 20180406123750.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF00985369 doi (NATIONALLICENCE)springer-10.1007/BF00985369 Isozyme evidence regarding the origins of three allopolyploid species of Polytrichastrum (Polytrichaceae, Bryophyta) [Elektronische Daten] [Gregory Derda, Robert Wyatt] Electrophoretic data show thatPolytrichastrum pallidisetum, P. ohioense, andP. sexangulare are allopolyploids. They display fixed, heterozygous banding patterns at five to six of the 11 enzyme loci that we screened. In total, we sampled 304 populations representing three genera (Polytrichastrum, Polytrichum, andPogonatum) and 18 species in our examination of the allopolyploids and their putative haploid progenitors. There were no extant species that fit perfectly as a progenitor of any allopolyploid. BothP. pallidisetum andP. ohioense appear to have originated as intergeneric hybrids between one progenitor with aPolytrichastrum-type genome and another with aPolytrichum-type genome. The extant haploid species with the most similar genomes to the putative progenitors ofP. pallidisetum werePolytrichastrum appalachianum andPolytrichum commune, whereas forPolytrichastrum ohioense the species werePolytrichastrum formosum (orP. longisetum) andPolytrichum commune. Polytrichastrum sexangulare was genetically more similar to species ofPogonatum, as was one taxon that appears to be one of its progenitors,P. sexangulare var.vulcanicum ( =Polytrichum/Pogonatum sphaerothecium). The other progenitor also must have possessed alleles that are common in species ofPogonatum. The Polytrichaceae are a relatively ancient group of mosses, and the hybridizations that gave rise to these allopolyploids may have occurred long ago. It is likely that the genomes of the original progenitors have changed over time or that those progenitors are now extinct. Springer-Verlag, 2000 Bryophyta nationallicence Polytrichaceae nationallicence Polytrichum nationallicence Polytrichastrum nationallicence Pogonatum nationallicence allopolyploid nationallicence progenitor nationallicence intergeneric hybrid nationallicence genetic identity nationallicence isozyme nationallicence Derda Gregory Department of Botany, University of Georgia, 30602, Athens, Georgia, USA aut Wyatt Robert Highlands Biological Station, P.O. Box 580, 28741, Highlands, North Carolina, USA aut Plant Systematics and Evolution Springer-Verlag 220/1-2(2000-03-01), 37-53 0378-2697 220:1-2<37 2000 220 606 https://doi.org/10.1007/BF00985369 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985369 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Derda Gregory Department of Botany, University of Georgia, 30602, Athens, Georgia, USA aut NATIONALLICENCE 700 1- Wyatt Robert Highlands Biological Station, P.O. Box 580, 28741, Highlands, North Carolina, USA aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 220/1-2(2000-03-01), 37-53 0378-2697 220:1-2<37 2000 220 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer