| Abstract: | Allozyme variation in 6 enzyme systems coding 10 loci was estimated for 18 subpopulations of Anthoxanthum alpinum from three altitudinal transects in two localities of the Swiss Alps.Mean proportions of polymorphic loci (95% criterion), average number of alleles per locus, andmean expected heterozygosity were 64.9%, 2.37 and 0. 252, respectively. Mean genetic distanceamong populations was 0.011, and 79% of the genetic variation resided within populations. Basedon allozyme analysis, marginal subpopulations appeared to have similar level of genetic variability tocentral subpopulations. Relatively high genetic differentiation, low gene flow values and smallneighbourhood sizes suggested that inbreeding followed by genetic drift was possible causes of lowgenetic variability in Arpette A. alpinum populations. |
