caa a22 4500 477038514 CHVBK 20180405111311.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00983385 doi (NATIONALLICENCE)springer-10.1007/BF00983385 Genetic variability in two hydrophilous species of Potamogeton, P. pectinatus and P. filiformis ( Potamogetonaceae ) [Elektronische Daten] [P. Hollingsworth, C. Preston, R. Gornall] Genetic variability inPotamogeton pectinatus andP. filiformis was studied by means of isozymes. The overall levels of variability were similar to some other well studied hydrophilous species, and were shown to be distributed more between than within populations. This partitioning of variability was attributed to three main factors. (1) Clonal growth (as measured by the frequency of multi-enzyme phenotypes) was shown to be a major factor in both species, although more important inP. pectinatus. (2) Low levels of sexual reproduction were shown to be a likely contributor to the partitioning of variability inP. pectinatus; such reproduction is probably limited by seedling recruitment rather than by infrequent flowering. (3) Geographical isolation was indicated as a factor regulating gene flow at distances of more than about 1000 km in both species, with the data suggesting that dispersal between populations is mainly by seed rather than by vegetative means. Springer-Verlag, 1996 Potamogetonaceae nationallicence Potamogeton nationallicence Genetic variability nationallicence isozymes nationallicence hydrophily nationallicence dispersal nationallicence Hollingsworth P. Division of Environmental & Evolutionary Biology, Institute of Biomedical & Life Sciences, University of Glasgow, G12 8QQ, Glasgow, UK aut Preston C. Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, PE17 2LS, Huntingdon, UK aut Gornall R. Botany Department, University of Leicester, LE1 7RH, Leicester, UK aut Plant Systematics and Evolution Springer-Verlag 202/3-4(1996-09-01), 233-254 0378-2697 202:3-4<233 1996 202 606 https://doi.org/10.1007/BF00983385 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00983385 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hollingsworth P. Division of Environmental & Evolutionary Biology, Institute of Biomedical & Life Sciences, University of Glasgow, G12 8QQ, Glasgow, UK aut NATIONALLICENCE 700 1- Preston C. Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, PE17 2LS, Huntingdon, UK aut NATIONALLICENCE 700 1- Gornall R. Botany Department, University of Leicester, LE1 7RH, Leicester, UK aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 202/3-4(1996-09-01), 233-254 0378-2697 202:3-4<233 1996 202 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer