Compared with sequence of TYR gene of non-black bone sheep, there were two nucleotide mutation sites in exon1 of black bone sheep, located in No.64 and No.154 amino acid codons, respectively;

• 结果发现，检测的乌骨绵羊TYR基因第一外显子有两个变异位点，分别位于第64和154号编码氨基酸上，但都属于同义突变。