Abstract
1.1. Serum transferrins and hemoglobins were analyzed by starch-gel electrophoresis from ninety-seven wild sheep collected from eight localities across northern Iran and from two Iranian domestic sheep.2.2. Comparison of transferrins from the wild sheep with domestic sheep reference sera demonstrated Tf alleles A, B, C, D and E in the former; new transferrin alleles designated Tf's A+,B+ and E− were also observed.3.3. Transferrin allele frequencies provided a means for differentiating wild sheep populations of northwestern Iran from those of northeastern Iran; natural hybrids displayed transferrin frequencies of an intermediate nature. Applications of the transferrin data to some taxonomic problems and to the origin of domestic sheep are discussed.4.4. Iranian wild sheep were found to possess Hbg B only.
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