Genetic polymorphisms in Iranian native poultry breeds Part II. Isoenzyme polymorphisms with special reference to alkaline phosphatase and esterase

Abstract

Esterase and alkaline phosphatase polymorphisms were studied in five Iranian native chicken breeds maintained in genetic reserve: Naked Neck, Dashtyaty, Lary, Marandy and Common breed. The frequency of esterase allele A is ranging from 0.50 to 0.19, that of allele B from 0.79 to 0.49 and C from 0.14 to 0.02 in the breeds studied. The genotypic frequencies of alkaline phosphatase AA ranged from 0.481 to 0.315 that of genotype aa from 0.648 till 0.519 for the breeds respectively. No electrophoretic band was found in the Dashtyary and Common breed. The gene frequencies of allele A ranged from 0.279-0.176 that of gene a ranged from 0.823-0.720. The heterozygosity index range for esterase was 0.579-0.344 and for alkaline phosphatase 0.599-0.480. The accuracy to distinguish chickens from one breed from the other taking random samples is low both for esterase loci PD 0.75 to 0.52 and alkaline phosphatase loci PD 0.67 to 0.62, for more accurate separation more polymorphic loci are needed to be typed.