The integrated contig with five sequences was identified to 8, 675bp, exactly, which separately comprised Bos taurus rRNA gene of 18S, ITS1, 5.8S, ITS2 and 28S with the length of l,873bp, 1, 072bp, 150bp, 1, 038bp and 4, 542bp.

• 采用DNAstar的SeqMan软件将5个奶牛rRNA基因片段序列拼接成8，675bp的片段，找出18S rDNA、ITS1、5.；8SrDNA、ITS2和28S rDNA大小分别为1，873bp、1，072bp、150bp、1，038bp和4，542bp。