Protein polymorphism in quail populations selected for large body size

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Abstract
The polymorphism of 5 enzyme loci (amylase, alkaline phosphatase, albumin, for 4 wk body wt was compared to that of the unselected control line (C). for 4 wk body wt was compared to that of the unselected control line (C). Three loci in the C line and 2 in the P line demonstrated polymorphism. Plamsa amylase was separated into 6 bands and zymograms were classified on the basis of these bands into 9 phenotypes. Of the 9 types 3 were of relatively high activity and 6 were of relatively low activity. All 9 types were found in the C line; all birds of the P line had only the most active type. Two alkaline phosphatase alleles (Akp-2B and Akp-2C) were segregating in the C line. Gene frequencies of alkaline phosphatase for the Akp-2B allele were 0.92 in the C line and 1.00 in the P line. Two albumin alleles (AlbQ1 and AlbQ2) were segregating in both populations. Gene frequencies for the AlbQ1 allele were 0.74 in the C line and 0.81 in the P line. Two red cell esterase-D alleles (Es-DF and Es-DF) were segregating in both populations. The gene frequency for the Es-DS allele (0.61) was higher than that of the Es-DF allele in the C line. In the P line the frequency of the Es-DF allele was higher than that of the Es-DS allele. Heterozygosities of the C and P lines were estimated as 0.2258 and 0.1560, respectively. The relative inbreeding coefficient of the P line, calculated from heterozygosities was 0.31.