INVESTIGATION OF GENETIC-VARIATION OF ISO ZYME LOCI IN SIBERIAN LARCHLARIX SIBIRICA LDB

Investigation of allozyme variation in nine populations of Siberian la rch (Larix sibirica Ldb.) revealed levels of allozyme variation typica l for coniferous species. Expected hererozygosity H-exp was 12 - 16%, the proportion of polymorphic loci was 38 - 55% and the average number of alleles was 1.4 - 2.0. The larch populations were shown to be sign ificantly subdivided (F-st = 8.2%). This is mainly due to differences between the western and eastern races, reaching 0.019 - 0.029 in Nei's genetic distances (unbiased estimates). The zone of transition betwee n the races reached 100 km.