中文摘要：

作者于2005年2月从广东省湛江市硇洲岛一位渔民手中采集到一块鲸类的脊椎骨,据渔民对该搁浅鲸类的外形描述推断该骨骼属于一种大型须鲸.为了鉴定该脊椎骨所属的种类,本文利用分子生物学技术,从中提取基因组DNA,并以此为模板特异性扩增Cyt b基因的部分序列进行物种鉴定.

英文摘要：

In order to identify an unknown whale vertebra＇s species,genomic DNA is extracted from the bone powder by proteinase K and phenol/chloroform,and a partial Cyt b gene sequence as long as 565 bp is amplified by PCR（Polymerase Chain Reaction）.The blasting result in GenBank shows that the vertebra sample has maximal similarity with Balaenoptera omurai,it is 99%.It indicates that the vertebra is Balaenoptera omurai.The phylogenetic tree based on UPGMA is consistent with the blasting result.Analysis of software MEGA shows that the Cyt b gene sequence of the vertebra sample has 1-2 nucleotides which are different from the homologous sequence of B.omurai（accession AB201257,AB201256）,thus,the sequence is a new haplotype.This is the first record of B.omurai which distributes in the South China Sea.