GENETIC-VARIABILITY IN LARCH LARIX SUKACZ EWII DUL IN THE SOUTHERN URALS - SPATIAL DIFFERENTIATION OF THE POPULATION

Spatial distribution of larch Larix sukaczewii in the southern Urals w as studied by 17 isozyme loci controlling ten isozyme systems. Two hun dred plants from four populations were analyzed. 97% of total genetic diversity was determined by variability within populations and 3% by v ariability between populations. Nei's and Gregorius' genetic distances were 0.010+/-0.003 and 0.070+/-0.002, respectively. Genetic distances did not correlate with geographical distances between populations. Th e obtained estimates of interpopulation differentiation were lower tha n those found for other larch species.