Abstract
In a previous paper, isolation by distance at RFLP loci was demonstrated in 10 populations of sea beet growing on the Dorset (U.K.) coast. In the same populations there was no evidence of isolation by distance at isozyme loci. Here, the data are reanalysed to reduce biases resulting from nonrandom mating within the populations; the contrast between RFLPs and isozymes remains very clear. Separate analysis of cliff-top populations shows strong isolation by distance at both RFLP and isozyme loci, whereas in populations on sea walls around the perimeter of Poole Harbour there is isolation by distance at RFLP loci but not isozyme loci. Thus, whatever the cause of the difference between RFLP and isozyme loci, it occurs in the harbour populations only. There was no evidence that founder effects are a significant source of variation between populations on the perimeter of the harbour. This is very different from a previous finding of strong founder effects between populations on Furzey Island (in Poole Harbour).
Similar content being viewed by others
Article PDF
References
Goudet, J. 1995. Fstat V-1.2: A computer program to calculate F-statistics. J Hered, 86, 485–486.
Karl, S A, and Avise, J C. 1992. Balancing selection at allozyme loci in oysters: implications from nuclear RFLPs. Science, 256, 100–102.
Koehn, R K. 1978. Physiology and biochemistrf of enzyme variation: the interface of ecology and population genetics. In: Brassard, P. (ed.) Ecological Genetics: The Interface, pp. 51–72. Springer-Verlag, New York.
Koehn, R K, and Hilbish, T J. 1987. The adaptive importance of genetic variation. Am Sci, 75, 134–141.
Levins, R. 1970. Extinction. Lect Math Life Sci, 2, 75–77.
Lewontin, R C. 1991. Electrophoresis in the development of evolutionary genetics: milestone or millstone? Genetics, 128, 657–662.
Lönn, M. 1993. Genetic structure and allozyme-microhabitat associations in Bromus hordeaceus. Oikos, 68, 99–106.
Manly, B F J. 1991. The Statistics of Natural Selection. Chapman & Hall, London.
Mantel, N. 1967. The detection of disease clustering and a generalised regression approach. Cancer Res, 27, 209–220.
Mitton, J B. 1989. Physiological and demographic variation associated with allozyme variation. In: Soltis, D. E. and Soltis, P. E. (eds) Isozymes in Plant Biology, pp. 126–145.Chapman & Hall, London.
Nevo, E, Krugman, T, and Beiles, A. 1994. Edaphic natural selection of allozyme polymorphisms in Aegilops peregrina at a Galilee microsite in Israel. Heredity, 72, 109–112.
Prentice, H C, Lönn, M, Lefkovitch, L P, and Runyeon, H. 1995. Associations between allele frequencies in Festuca ovina and habitat variation in the alvar grasslands on the Baltic island of Öland. J Ecol, 83, 391–402.
Rainey, D Y, Mitton, J B, and Monson, R K. 1987. Associations between enzyme genotypes and dark respiration in perennial ryegrass, Lolium perenne L. Oecologia, 74, 335–338.
Raybould, A F, Mogg, R J, and Clarke, R T. 1996a. The genetic structure of Beta vulgaris ssp. maritima (sea beet) populations: RFLPs and isozymes show different patterns of gene flow. Heredity, 77, 245–250.
Raybould, A F, Goudet, J, Mogg, R J, Gliddon, C J, and Gray, A J. 1996b. Genetic structure of a linear population of Beta vulgaris ssp. maritima (sea beet) revealed by isozyme and RFLP analysis. Heredity, 76, 111–117.
Rice, W B. 1989. Analyzing tables of statistical tests. Evolution, 43, 223–225.
Riddoch, B J. 1993. The adaptive significance of electrophoretic mobility in phosphoglucose isomerase. Biol J Linn Soc, 50, 1–17.
Slatkin, M. 1993. Isolation by distance in equilibrium and non-equilibrium populations. Evolution, 47, 264–279.
Van Valen, L. 1965. Morphological variation and niche width. Am Nat, 99, 377–390.
Watt, W B. 1994. Allozymes in evolutionary genetics: self-imposed burden or extraordinary tool? Genetics, 136, 11–16.
Weir, B S, and Cockerham, C C. 1984. Estimating F-statistics for the analysis of population structure. Evolution, 38, 1358–1370.
Wright, S. 1943. Isolation by distance. Genetics, 28, 114–138.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Raybould, A., Mogg, R. & Gliddon, C. The genetic structure of Beta vulgaris ssp. maritima (sea beet) populations. II. Differences in gene flow estimated from RFLP and isozyme loci are habitat-specific. Heredity 78, 532–538 (1997). https://doi.org/10.1038/hdy.1997.83
Received:
Issue Date:
DOI: https://doi.org/10.1038/hdy.1997.83