SUMMARY
Milk samples from 120 Russian Merino (Precos) and 30 Romanov sheep were
analyzed by polyacrilamide gel electrophoresis under acid conditions to study the
Genetic polymorphism of -lactoglobulin (-Lg) in two Russian sheep breeds. Five
different -Lg phenotypes (A, B, AB, AC and BC) were observed in Precos breed
milk, but only three phenotypes were found in Romanov breed milk (A, B and AB).
Differences in gene frequencies between flocks were observed. The gene frequencies
of -Lg were: A: 0.617, B: 0.36, C: 0.016 in Precos breed milk and A: 0.600, B:
0.400 in Romanov breed milk.