排序方式: 共有55条查询结果,搜索用时 15 毫秒
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山西汉族人群DYS460基因座遗传多态性 总被引:1,自引:1,他引:0
本文对山西地区汉族群体的DYS460基因座遗传多态性进行了调查,现报道如下。1材料与方法1.1样品100名无关男性个体和20名女性个体来自山西汉族人群,取外周血1ml,用EDTA抗凝,DNA提取采用TKM法[1]并做相应调整:TKM破坏红细胞,白细胞用2×蛋白酶K消化液(20 mmol/L Tris-HCl,pH7.6;20 mmol/L EDTA,pH8.0;300 mmol/L NaCl;1%SDS)和蛋白酶K(100μg/ml)55℃水浴3~5h。酚-氯仿抽提,无水乙醇沉淀,最后溶于无菌去离子水中。1.2方法引物引物序列参照基因库GDB,由大连TaKa-La公司合成。PCR扩增及电泳检测50μl反应体系,含50~100ng基因… 相似文献
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Ann Marie Gross M.S. ; Amy A. Liberty M.S. ; Megan M. Ulland B.S. ; Jacquelyn K. Kuriger M.S. 《Journal of forensic sciences》2008,53(1):125-134
Abstract: Y-chromosomal short-tandem repeat (Y-STR) amplification has been used in forensic casework at the Bureau of Criminal Apprehension (BCA) Forensic Science Laboratory since 2003. At that time, two separate amplifications were required to type the SWGDAM recommended loci (DYS19, DYS385a/b, DYS389I, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS438, and DYS439). The Yfiler™ kit coamplifies these loci as well as DYS437, DYS448, DYS456, DYS458, DYS635, and Y GATA H4. The Yfiler™ kit was validated following the internal validations outlined in the SWGDAM revised validation guidelines. Our studies show that 0.125 ng of male DNA will generate a complete 17 locus profile and that as little as 0.06 ng of male DNA yields an average of nine loci. In the male–male mixtures, a complete profile from the minor component was detected up to 1:5 ratio; most of the alleles of the minor component were detected at a 1:10 ratio and more than half the alleles of the minor component were detected at a 1:20 ratio. Complete YSTR profiles were obtained when 500 pg male DNA was mixed with female DNA at ratios up to 1:1000. At ratios of 1:5000 and 1:10,000 (male DNA to female DNA) inhibition of the YSTR amplification was evident. The YSTR results obtained for the adjudicated case samples gave significantly more probative information than the autosomal results. Our studies demonstrate that the Yfiler™ kit is extremely sensitive, does not exhibit cross-reactivity with female DNA, successfully types male DNA in the presence of overwhelming amounts of female DNA and is successful in typing actual forensic samples from adjudicated cases. 相似文献
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Population: 103 unrelated male individuals from Cebu province, Central Visayas region of the Philippines. 相似文献
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目的建立检测DYS385的新方法。方法比较基因数据库(GDB)中推荐的引物和Schneider所设计的引物扩增DYS385的效果;在此基础上,以GDB推荐的引物作为外引物,Schneider所设计的引物作为内引物,通过调整内、外引物的浓度,优化扩增条件,建立DYS385的半巢式PCR体系。结果与常规方法相比,采用Schneider所设计的引物扩增DYS385,扩增片段缩短112bp,电泳分离的效果好,灵敏度提高2倍,达500pg;建立的半巢式扩增方法,能特异性扩增短片段,灵敏度提高20倍,达50pg。结论建立的DYS385半巢式扩增方法具有更高的特异性和灵敏度,适合法医学应用。 相似文献
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Y染色体STR的银染复合扩增 总被引:2,自引:0,他引:2
目的建立一套Y染色体STR的复合扩增体系,检测中国藏族人群的单倍型分布。方法利用复合扩增的方法扩增DYS434、DYS443和DYS456三个基因座,利用聚丙烯酰胺凝胶电泳银染进行分型,检测西藏藏族101名无关男性个体单倍型分布。结果三个基因座在藏族样本中分别检测出4、4、6个等位基因,共检测出31种单倍型,其单倍型的变异度是0.9481,标准误为0.0049。结论Y-STR的复合扩增在法医学的亲权鉴定和个人识别中有重要的作用。 相似文献
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Genetics and genomics of core short tandem repeat loci used in human identity testing 总被引:8,自引:0,他引:8
Butler JM 《Journal of forensic sciences》2006,51(2):253-265
Over the past decade, the human identity testing community has settled on a set of core short tandem repeat (STR) loci that are widely used for DNA typing applications. A variety of commercial kits enable robust amplification of these core STR loci. A brief history is presented regarding the selection of core autosomal and Y-chromosomal STR markers. The physical location of each STR locus in the human genome is delineated and allele ranges and variants observed in human populations are summarized as are mutation rates observed from parentage testing. Internet resources for additional information on core STR loci are reviewed. Additional topics are also discussed, including potential linkage of STR loci to genetic disease-causing genes, probabilistic predictions of sample ethnicity, and desirable characteristics for additional STR loci that may be added in the future to the current core loci. These core STR loci, which form the basis for DNA databases worldwide, will continue to play an important role in forensic science for many years to come. 相似文献