MORPHOLOGICAL AND ALLOZYMIC POLYMORPHISM AND DIFFERENCES AMONG LOCAL-POPULATIONS IN BRADYBAENA-FRUTICUM (MULLER,O.F., 1777) (GASTROPODA, STYLOMMATOPHORA, HELOCOIDEA)
A. Falniowski et al., MORPHOLOGICAL AND ALLOZYMIC POLYMORPHISM AND DIFFERENCES AMONG LOCAL-POPULATIONS IN BRADYBAENA-FRUTICUM (MULLER,O.F., 1777) (GASTROPODA, STYLOMMATOPHORA, HELOCOIDEA), Malacologia, 35(2), 1993, pp. 371-388
Morphological variation (shell colour and banding, mantle pigmentation
, colour and pigmentation of reproductive organs, external form of the
mucous gland) and allozymic polymorphism at 13 loci (by means of vert
ical slab polyacrylamide gel electrophoresis) were studied in Bradybae
na fruticum (O. F. Muller, 1777) from 11 localities in southern Poland
and Slovakia. Descriptions and illustrations of variation in all the
morphological characters, and frequencies at every locality are given.
Of the 13 loci studied, six were polymorphic. The proportion of polym
orphic loci (15.5-46.1%, mean 36%) was relatively low for a morphologi
cally polymorphic species. Heterozygote frequencies were as expected f
rom Hardy-Weinberg equilibrium, with the exception of the CAP(1) locus
, at which a significant heterozygote excess was found. The values of
Nei's distances between populations (0.017-0.282) were relatively high
for geographically close conspecific populations, and often a higher
Value of genetic distance did not correspond with a greater geographic
distance. For morphological characters and for allozyme frequencies (
directly and after computing Cavalli-Sforza and Edwards's are distance
s) similarity trees were computed for all populations by means of the
maximum likelihood and additive tree techniques.