Abstract
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.
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Barrett, S. C. H., Eckert, C. G., Husband, B. C., 1993: Evolutionary processes in aquatic plant populations. — Aquatic Bot.44: 105–145.
Ellstrand, N. C., Roose, M. L., 1987: Patterns of genotypic diversity in clonal plant species. — Amer. J. Bot.74: 123–131.
Fager, E. W., 1972: Diversity: a sampling study. — Amer. Naturalist106: 293–310.
Gottlieb, L. D., 1981: Electrophoretic evidence and plant populations. — InReinhold, L. & al., (Eds): Progress in phytochemistry7: 1–46. — Oxford: Pergamon.
Grace, J. B., 1993: The adaptive significance of clonal reproduction in the angiosperms — an aquatic perspective. — Aquatic Bot.44: 159–180.
Guo, Y. H., Cook, C. D. K., 1989: Pollination efficiency ofPotamogeton pectinatus L. — Aquatic Bot.34: 381–384.
Hagström, J. O., 1916: Critical researches on the Potamogetons. — Kongl. Svenska Vetenskapsakad. Handl.55(5: 1–281.
Hamrick, J. L., Godt, M. J. W., 1990: Allozyme diversity in plant species. — InBrown, A. H. D., Clegg, M. T., Kahler, A. L., Weir, B. S., (Eds): Plant population genetics, breeding, and genetic resources, pp. 43–64. — Sunderland, MA: Sinauer.
Hedrick, P. W., 1975: Genetic similarity and distance: comments and comparisons. — Evolution29: 362–366.
Hettiarachchi, P., Triest, L., 1986: Isozyme polymorphism ofPotamogeton pectinatus L. — Proceedings of the 7th symposium on aquatic weeds, pp. 163–168.
Hettiarachchi, P., Triest, L., 1991: Isozyme polymorphism in the genusPotamogeton (Potamogetonaceae). — Opera Bot. Belg.4: 87–114. — Meise: National Botanic Garden of Belgium.
Hollingsworth, P. M., 1995: Chromosome numbers. — InPreston, C. D.: Pondweeds of Great Britain and Ireland, pp. 55–58. — London: B.S.B.I.
—, 1995a: Genetic variability in British populations ofPotamogeton coloratus (Potamogetonaceae). — Pl. Syst. Evol.197: 71–85.
—, 1995b: Isozyme evidence for hybridization betweenPotamogeton natans andP. nodosus (Potamogetonaceae) in Britain. — Bot. J. Linn. Soc.117: 59–69.
Hollingsworth, P. M., Preston, C. D., Gornall, R. J., 1996: Isozyme evidence for the parentage and multiple origins ofPotamogeton ×suecicus (P. pectinatus ×P. filiformis, Potamogetonaceae). — Pl. Syst. Evol.202: 219–232.
Hultén, E., Fries, M., 1986: Atlas of north European vascular plants north of the tropic of Cancer.1–3. — Königstein: Koeltz.
Hutchinson, G. E., 1975: A treatise on limnology.3. Limnological botany. — New York: Wiley.
Kalkman, L., van Wijk, R. J., 1984: On the variation in chromosome number inPotamogeton pectinatus L. — Aquatic Bot.20: 343–349.
Laushman, R. H., 1993: Population genetics of hydrophilous angiosperms. — Aquatic Bot.44: 147–158.
Les, D. H., 1986: The evolution of achene morphology inCeratophyllum (Ceratophyllaceae). I. Fruit-spine variation and relationships ofC. demersum, C. submersum andC. apiculatum. — Syst. Bot.11: 549–558.
—, 1988: Breeding systems, population structure and evolution in hydrophilous angiosperms. — Ann. Missouri Bot. Gard.75: 819–835.
—, 1991: Genetic diversity in the monoecious hydrophileCeratophyllum (Ceratophyllaceae). — Amer. J. Bot.78: 1070–1082.
Manly, B. F. J., 1994: Multivariate statistical methods. A primer. 2nd edn. — London: Chapman & Hall.
McMillan, C., 1991: Isozyme patterning in marine spermatophytes. — Opera Bot. Belgica4: 193–200. — Meise: National Botanic Garden of Belgium.
Parker, E. D., 1979: Ecological implications of clonal diversity in parthenogenetic morphospecies. — Amer. Zoologist19: 753–762.
Peet, R., 1974: The measurement of species diversity. — Annual Rev. Ecol. Syst.5: 285–307.
Pielou, E. C., 1969: An introduction to mathematical ecology. — New York: Wiley-Interscience.
Pieterse, A. H., Murphy, K. J., 1990: Aquatic weeds. — Oxford: Oxford University Press.
Preston, C. D., 1995: Pondweeds of Great Britain and Ireland. — London: B.S.B.I.
Sculthorpe, C. D., 1967: The biology of aquatic vascular plants. — London: Arnold.
Sneath, P. H. A., Sokal, R. R., 1973: Numerical taxonomy, 2nd edn. — San Francisco: Freeman.
Sorsa, P., 1988: Pollen morphology ofPotamogeton andGroenlandia (Potamogetonaceae) and its taxonomic significance. — Ann. Bot. Fenn.25: 179–199.
Stewart, A., Pearman, D. A., Preston, C. D., (Eds), 1994: Scarce plants in Britain. — Peterborough: J.N.C.C.
Triest, L., (Ed.), 1991a: Isozymes in water plants. — Opera Bot. Belg.4. — Meise: National Botanic Garden of Belgium.
—, 1991b: Isozymes inLagarosiphon (Hydrocharitaceae) populations from South Africa: the situation in dioecious, but mainly vegetatively propagating weeds. — Opera Bot. Belgica4: 71–85. — Meise: National Botanic Garden of Belgium.
—, 1991c: Enzyme polymorphism and its relationships to biological features in aquatic plants (including a comparison with terrestrial plants). — Opera Bot. Belgica4: 201–240. — Meise: National Botanic Garden of Belgium.
—, 1991: Isozymes in European and MediterraneanZannichellia (Zannichelliaceae) populations: a situation of predominant inbreeders. — Opera Bot. Belgica4: 133–166. — Meise: National Botanic Garden of Belgium.
Tur, N. M., 1982: Revisión del géneroPotamogeton L. en la Argentina. — Darwinia24: 217–265.
Van der Bijl, L., Sand-Jensen, K., Hjermind, A. L., 1989: Photosynthesis and canopy structure of a submerged plant,Potamogeton pectinatus, in a Danish lowland stream. — J. Ecol.77: 947–962.
Van Wijk, R. J., 1988: Ecological studies onPotamogeton pectinatus L. I. General characteristics, biomass production and life cycles under field conditions. — Aquatic Bot.31: 211–258.
—, 1989a: Ecological studies onPotamogeton pectinatus L. III. Reproductive strategies and germination ecology. — Aquatic Bot.33: 271–299.
—, 1988: Ecological studies onPotamogeton pectinatus L. II. Autecological characteristics, with emphasis on salt tolerance, intraspecific variation and isoenzyme patterns. — Aquatic Bot.32: 239–260.
Wendel, J. F., Weeden, N. F., 1989: Visualization and interpretation of plant isozymes. — InSoltis, D. E., Soltis, P. S., (Eds): Isozymes in plant biology, pp. 46–72. — Portland: Dioscorides.
Wiegleb, G., 1988: Notes on pondweeds — outlines for a monographical treatment of the genusPotamogeton L. — Repert. Spec. Nov. Regni Veg.99: 249–266.
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Hollingsworth, P.M., Preston, C.D. & Gornall, R.J. Genetic variability in two hydrophilous species ofPotamogeton, P. pectinatus andP. filiformis (Potamogetonaceae). Pl Syst Evol 202, 233–254 (1996). https://doi.org/10.1007/BF00983385
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DOI: https://doi.org/10.1007/BF00983385