Mating system parameters in a natural population of Abies borisii regis Mattfeld

Abstract

Isozymes were used to estimate mating system parameters of one natural Abies borisii regis population from the Pertouli forest, Thessaly, Greece. Starch gel electrophoresis was performed and 17 trees were genotyped for seven variable loci using open-pollinated seeds. Under the mixed mating model, selfing rate was significantly different from zero although outcrossing accounted for 94% of all zygotes formed. The parental fixation index was significantly lower than zero, indicating heterozygote excess. A limited number of parents was shown to participate in the matings.