Zk. Shigapov et al., GENETIC-VARIATION AND DIFFERENTIATION IN NATURAL-POPULATIONS OF THE COMMON PINE PINUS-SYLVESTRIS L, Genetika, 31(10), 1995, pp. 1386-1393
Genetic variation and differentiation for 12 gene-enzyme systems was e
xamined electrophoretically in eight natural populations of the common
pine from the southern Urals (Russia), eastern Germany, and Latvia. T
he observed and expected heterozygosity values, averaged over all loci
, were 0.156 and 0.183, respectively. The proportion of polymorphic lo
ci was 48.3% and 59.4%, according to the 95% and 99% criteria, respect
ively. The average number of alleles per locus was 2.18, or 1.96 accor
ding to the 1% criterion. Intrapopulation variation explained approxim
ately 98% of the total genetic diversity, while interpopulation hetero
geneity accounted only for 2%. Nei's genetic distances between the pop
ulations varied from 0.004 to 0.022, averaging 0.010. Cluster analysis
did not show associations between the distribution of the populations
on the dendrogram and their geographic location. These results confir
m existing evidence on the high level of genetic variation and low dif
ferentiation, which is characteristic of most conifer species,with lar
ge population sizes and extensive ranges.