人类线粒体DNA的异质型

研究中国人群中线粒体 D 环区不同组织间的差别,用 PCR-测序方法对53个无关个体的毛发与血液样本进行线粒体 DNA 高变区 HVⅠ进行测序分析,通过377测序仪检测,发现1例个体中血液与毛发样本线粒体 HV Ⅰ区15997～16401间存在序列差异。在16235碱基处,毛发样本表现为 T,血液样本为 C/T。结果显示中国人群同一个体不同组织存在线粒体序列差异。     

利用16S rDNA序列鉴定常见嗜尸性蝇类种属

目的通过分析16S rDNA 551bp基因序列,鉴定常见嗜尸性蝇类种属。方法随机采集17个地区放置于室外草地的家兔尸体上7个种24只嗜尸性苍蝇样本,经形态学鉴定种类后,提取胸肌DNA,对16S rDNA 551bp基因片段进行PCR扩增,产物纯化、测序后上传GenBank;利用MEGA 4.0软件构建序列间的系统发育树,分析建立种内及种间进化分歧表。结果 24只样本16S rDNA序列分析显示7种蝇类可以较好聚类;其中棕尾别麻蝇种内进化分歧整体均数为2.8%,家蝇为1.5%,丽蝇科的5个种均在0.7%以内。上述7个蝇种的种间进化分歧均数在1.6%～7.1%之间。其中,棕尾别麻蝇、家蝇与其它蝇类的种间分歧均数在4.0%～7.1%之间。结论本文分析结果显示,蝇种间同源性相差明显,采用mtDNA 16S rDNA中551bp基因序列分析,可进行蝇种鉴定。     

利用COI序列序列鉴定常见嗜尸性蝇种

目的 检测嗜尸性蝇类线粒体DNA(mtDNA)细胞色素氧化酶辅酶Ⅰ(COI)中278bp序列,鉴定蝇科3属5种嗜尸性蝇,解决其形态学种类鉴定的难题,为死亡时间推断提供技术支持.方法 从15省、市(地区)室外草地家兔尸体上采集蝇科3属5种共计18个蝇类成蝇样本,提取mtDNA进行PCR扩增,序列测定且上传GENBANK,...     

World War One Italian and Austrian soldier identification project: DNA results of the first case

We report the results of an attempt to identify the supposed remains of a famous World War I (WWI) Italian soldier who was killed in battle along the Italian front in 1915.Thanks to the availability of offspring from both paternal and maternal lineage Y-STRs and mtDNA were analysed and both showed a clear exclusion scenario: the remains did not belong to the supposed war hero.This is the first effort of identification of the remains of soldiers who perished during World War I within a multidisciplinary project aimed at the retrieval of historical and cultural aspects linked to WWI, and the systematic study of the remains of soldiers and ultimately their identification. This last step involves both Italian and Austrian laboratories.