Abstract: Yuxi fat-tailed sheep in Hennan were used to investigate the polymorphism of hemoglobin(Hb),transferrins(Tf),erythrocyte proteins(Ep),preceding-album(Pa) and arylesterase (Es) by discontinuous polyacrylamide gel electrophoresis (PAGE) .The results showed that there were three genetypes including HbAA, HbAB, HbBB on the locus of hemoglobin which were controlled by two allelic genes Hb^A and Hb^B in Yuxi fat-tailed sheep populations. The genotypic frequency of HbAA, HbAB, HbBB were 0.0571, 0.6286, 0.3143. The gene frequency of Hb^A and Hb^B were 0.3714 and 0.6286. There were three gene types including TfAA, TfAB, TfBB on the locus of transferrins which were controlled by two allelic genes Tf^Aand Tf^B in Yuxi fat-tailed sheep populations. The genotypic frequency of TfAA, TfAB, TfBB were 0.2000, 0.2545, 0.5455. The gene frequency of Tf^A and Tf^B were 0.3273 and 0.6727. The research discovered that it had examined the multi-state properties in the Ep gene place, it had the EpAA and the EpAa two genetypes. The genotypic frequency of EpAA, EpAa were 0.4286 and 0.5714. The gene frequency of Ep^A and Ep^a were 0.7143, 0.2857. The results showed that the Yuxi fat-tailed sheep Es loci had two alleles that Es⁺ and Es^-, and the Es⁺ and Es^- gene frequency 0.5500 and 0.4500 for the other, there were three kinds genotypes of Es⁺⁺, Es^+-, Es^--, the frequency were 0.4250, 0.2500, and 0.3250, respectively. The research discovered that it had not examined the multi-state properties in the preceding-album gene place.

Key words: Yuxi fat-tailed sheep; blood proteins; hemoglobin; transferrins; arylesterase 