Allozymes as aids for identification and differentiation of some Populus maximowiczii Henry Clonal varieties

Allozyme genotypes of nine Populus maximowiczii clonal varieties originating in China and Japan were determined for 35 loci coding for 12 enzyme systems in root tips. The interclonal variability was controlled by 13 polymorphic loci. Seven unique multilocus genotypes were identified. The unique genotypes differed from each other on an average of 6.73 loci. Principal Component (PC) 1 from the Principal Component Analysis of the clonal allozyme genotype data separated the clones into two distinct groups; one consisting of clones of Chinese and another clones of Japanese origins. Japanese clones of different sources were further differentiated by the PC 2. Allozyme genotypes were found to be useful for identification of clones and differentiation of their geographic origins.