Scientific publications

Genetic characteristics of populations of Norway spruce (Picea abies Karst) and Scots pine (Pinus silvestris L.) have been studied using isozyme techniques. Despite large geographic distances between seed sources tested, the differences in genetic constitution of populations did not increase appreciably. The genetic distance (d) has been found to range from 0.006 to 0.017 for spruce and from 0.002 to 0.027 for pine. A notable exception to this rule is population of spruce from Kestenga (d = 0.023). Average values of alleles per locus were 1.95 for spruce and 1.72 for pine. Greater genetic variability resides within populations then between them. Generally, conifers in Karelia exhibite reduction of genetic diversity. This reduction may be due to: (i) marginal geographic location, (ii) intensive exploitation of forest trees.

Genetic study may be very useful for decisions of the range of possible seed transfers and on delimiting breeding zones. There are two seed zones in Karelia now. Each zone is presumed to represent relatively homogeneous unit, within which the genotypes are adapted to environmental conditions. Our study indicates that present seed zonation is needed to be reconstructed. Population structure of forest trees must be laid down in base of this seed zonation.