MATING SYSTEM PARAMETERS IN A NATURAL-POPULATION OF ABIES BORISII REGIS MATTFELD

Isozymes were used to estimate mating system parameters of one natural Abies borisii regis population from the Pertouli forest, Thessaly, Gr eece. Starch gel electrophoresis was performed and 17 trees were genot yped for seven variable loci using open-pollinated seeds. Under the mi xed mating model, selfing rate was significantly different from zero a lthough outcrossing accounted for 94% of all zygotes formed. The paren tal fixation index was significantly lower than zero, indicating heter ozygote excess. A limited number of parents was shown to participate i n the matings.