The frequencies of the three KRTAP20-2 alleles in the 373 Longdong cashmere goats were: A:68.37%, B: 28.95%, and C: 2.68%. Five genotypes (AA, AB, BB, AC, and BC) were detected. Of these, AA,AB, and BB were the most common, with a combined frequency of 94%. The remaining two genotypes(AC and BC) occurred at a frequency less than 5%, and genotype CC was not observed.