An STR forensic typing system for genetic individualization of domestic cat (Felis catus) samples

A forensic genotyping panel of 11 tetranucleotide STR loci from the domestic cat was characterized and evaluated for genetic individualization of cat tissues. We first examined 49 candidate STR loci and their frequency assessment in domestic cat populations. The STR loci (3-4 base pair repeat motifs), mapped in the cat genome relative to 579 coding loci and 255 STR loci, are well distributed across the 18 feline autosomes. All loci exhibit Mendelian inheritance in a multi-generation pedigree. Eleven loci that were unlinked and were highly heterozygous in cat breeds were selected for a forensic panel. Heterozygosity values obtained for the independent loci, ranged from 0.60-0.82, while the average cat breed heterozygosity obtained for the 11 locus panel was 0.71 (range of 0.57-0.83). A small sample set of outbred domestic cats displayed a heterozygosity of 0.86 for the 11 locus panel. The power of discrimination of the panel is moderate to high in the cat breeds examined, with an average P(m) of 3.7E-06. The panel shows good potential for genetic individualization within outbred domestic cats with a P(m) of 5.31E-08. A multiplex protocol, designed for the co-amplification of the 11 loci and a gender-identifying locus, is species specific and robust, generating a product profile with as little as 0.125 nanograms of genomic DNA.     

中国鄂温克族人群15个STR基因座多态性研究

目的调查15个STR基因座在中国鄂温克族人群中的基因频率分布。方法应用PowerPlex16System复合扩增系统,对99名鄂温克族无关个的血样DNA进行多态性研究。结果在鄂温克族人群中15个STR基因座偶合率(Pm)在0.0205～0.1733之间,个体识别概率(DP)在0.8267～0.9795之间,杂合度在0.6061～0.9091之间,三联非父排除率(PE)在0.4038～0.7690之间,多态性信息总量(PIC)在0.5985～0.8734之间,15个STR基因座总TDP值为0.9999999999998,所有基因座经χ2检验符合Hard-Weinberg平衡。结论上述15个STR基因座在鄂温克族人群中等位基因分布较好,个体识别率高,适合法医个体识别和亲子鉴定。     

中国东部蒙古族人群15个STR基因座多态性研究

目的调查15个STR基因座在中国东部蒙古族人群中的基因频率分布。方法应用四色荧光标记引物复合扩增技术,对105名东部蒙古族无关个的血样15个STR基因座进行多态性研究。结果在东部蒙古族人群中15个STR基因座偶合率在0.0084～0.2169之间,个体识别概率(DP)在0.7831～0.9916之间,杂合度在0.5619～0.9231之间,三联非父排除率(PE)在0.4490～0.8444之间,多态性信息总量(PIC)在0.5438～0.9178之间,15个STR基因座总TDP值为0.9999999999998,所有基因座经χ2检验符合Hard-Weinberg平衡。结论上述15个STR基因座在东部蒙古族人群中等位基因分布较好,个体识别率高,适合法医个体识别和亲子鉴定。     

犬11个STR基因座的遗传多态性

目的调查犬11个STR基因座的群体遗传多态性。方法应用自主构建的犬11个STR基因座（PEZ1、PEZ2、PEZ3、PEZ5、PEZ6、PEZ8、PEZ12、FH2010、FH2054、FH2132和FH2611）荧光复合扩增体系，扩增105只犬的样本，统计各基因座扩增结果，并分析其群体遗传参数。结果11个STR基因座的累积非父排除率和累积个体识别率分别为0．9330621和0．9999999．平均杂和度和平均多态信息含量分别为0．502和0．640。结论该11个犬STR基因座的遗传多态性较好，可以有效用于犬的个体识别和亲权鉴定。     

广西苗族人群15个STR基因座的多态性调查

目的调查广西苗族人群无关个体的15个STR基因座(D8S1179、D21S11、D7S820、CSF1PO、D3S1358、TH01、D13S317、D16S539、D2S1338、D19S433、vWA、TPOX、D18S51、D5S818、FGA)多态性,研究其在法医学检验中的应用价值。方法应用AmpFlSTRIdentifilerTM荧光标记复合扩增系统对274例广西苗族无关个体血样DNA进行15个STR基因座的复合扩增,用ABI3100遗传分析仪对扩增产物进行检测,用GeneScan、GenoTyper软件进行基因分型,统计计算15个STR基因座的群体遗传学参数。结果IdentifilerTM荧光标记系统的15个STR基因座在广西苗族人群的累积偶合率为5.04×10-17,累积非父排除率分别为0.9999993。结论该15个STR基因座可满足广西苗族人群法医学的个体识别及亲权鉴定的需要。     

海南汉族人群19个STR基因座遗传多态性及其应用

目的建立海南地区汉族人群19个常染色体STR基因座的遗传多态性数据资料,并探讨此19-STR基因座系统在亲子鉴定中的应用。方法对海南汉族462例无血缘关系个体,采用Goldeneye~(TM) 20A系统复合扩增并检测,得到19个STR基因座的遗传数据信息;在283例亲子鉴定案例中,评价19-STR基因座系统的应用。结果 19个STR基因座的基因频率分布均符合Hardy-Weinberg平衡(P0.05),杂合度在0.603~0.914之间,累积个体识别率大于0.999 999 999 999 999,累积三联体非父排除率为0.999 999 994。283例亲子鉴定中,三联体170例,二联体113例;认定案例247例(87.3%),排除案例36例(12.7%);发生等位基因突变案例14例(4.9%),均为一步突变。结论 19个STR基因座中的14个基因座具有高度遗传多态性,19-STR基因座复合扩增分型系统具有较高的非父排除效能,可满足海南地区亲子鉴定的需要,同时应注意亲子鉴定中的基因突变现象。     

云南壮族人群15个STR基因座遗传多态性

目的 对600个云南壮族人群15个常染色体短串联重复(short tandem repeat,STR)序列基因座的遗传多态性进行调查,探讨云南壮族群体遗传学特性及在法医学中的应用价值.方法 使用AmpFLSTR? Identifiler? Direct PCR扩增试剂盒对此地区600名壮族无关个体血样DNA进行PCR扩...     

广西地区壮族人群17个STR基因座遗传多态性研究

目的调查广西地区壮族人群17个STR基因座遗传多态性,为法医物证鉴定和群体遗传研究提供基础数据。方法收集2624份广西地区壮族人群无关个体样本采用Chelex-100提取样本DNA,用PowerPlex■18D System试剂盒进行PCR扩增及检测,计算群体遗传学参数。结果17个常染色体STR基因型分布均符合Hardy-Weinberg平衡定律(P>0.05),共检测出235个等位基因,971种基因型,累积个体识别率(TDP)为0.999999999999999,累积非父排除率(CPE)为0.999999772。结论17个STR基因座在广西地区壮族人群中具有较好的遗传多态性,可以用于法医学中个体识别和亲权鉴定,也可用于群体遗传学及法医学研究。     

河南汉族群体6个STR基因座遗传多态性研究

目的　通过研究 6个STR基因座FGA ,TPOX ,D3S135 8,vWA ,D8S1179,D2 1S11的遗传多态性 ,了解它们在河南汉族人群中的多态分布 ,与其他群体进行比较 ,得出遗传距离 ,并了解它在法医学中的应用价值。　方法　采用多聚酶链式反应扩增这 6个基因座 ,采用非变性聚丙烯酰氨凝胶电泳银染显色分析。　结果　得出这 6个基因座在河南汉族人群中的基因频率 ,并计算得出杂合度、个体识别率、非父排除率 ,与其他群体比较得出进化距离。　结论　这 6个基因座有较高的杂合度 ,并且具有相对遗传稳定性 ,在人群中的分布符合Hardy -Weinberge平衡 ,有较高的法医学价值 ,可以应用于个体识别和亲权鉴定。     

21个非CODIS STR基因座的遗传多态性

目的 调查华东汉族人群21个非CODIS STR基因座的遗传多态性并评价其法医学应用价值.方法 用AGCU 21+1 STR试剂盒,对华东地区汉族225个无关个体的21个非CODIS STR基因座进行扩增,用3130遗传分析仪检测扩增产物,GeneMapper ID v3.2软件进行分型,采用PowerStats v1...     

湖南汉族人群21个STR基因座的遗传多态性(英文)

目的调查湖南地区汉族人群21个STR基因座(D3S1358、D13S317、D7S820、D16S539、Penta E、D2S441、TPOX、TH01、D2S1338、CSF1PO、Penta D、D10S1248、D19S433、v WA、D21S11、D18S51、D6S1043、D8S1179、D5S818、D12S391和FGA)的遗传多态性。方法共采集560例湖南汉族健康无关个体血液样本,使用Chelex-100法提取DNA,应用AGCU EX22试剂盒及9700 PCR扩增仪进行复合扩增,扩增产物使用310遗传分析仪进行分离分析。结果共发现248个等位基因,等位基因频率分布在0.001~0.518。除Penta E(P=0.023)外,其余基因座的基因型分布均符合Hardy-Weinberg平衡。21个基因座的累积个人识别率、累积非父排除率、累积匹配率分别为0.999 999 999 999 999 999 999 999 8、0.999 999 998和1.36×10-25。结论 21个STR基因座在湖南汉族人群中呈高度多态性。本研究可为法医学个人识别及亲子鉴定提供有价值的数据及理论基础。     

Individualization of tiger by using microsatellites

In investigating criminal cases of poaching and smuggling involving tigers (Panthera tigris), the number of tiger individuals involved is critical for determining the penalty. Morphological methodologies do not often work because tiger parts do not possess the distinctive characteristics of the individual. Microsatellite DNAs have been proved a reliable marker for the individualization of animals. Seven microsatellite loci derived from domestic cat (Felis catus) were selected to individualize tigers, namely F41, F42, F146, Fca304, Fca391, Fca441 and Fca453. A reference population containing 37 unrelated tigers were used to investigate alleles, allelic frequencies, genotypes and genotype frequencies of each locus. Consequently, the data was used to assess the validity of the combination of seven loci for tiger individualization. All loci were polymorphic and easy to amplify. Three out of the seven loci were significantly departure from the Hardy-Weinberg Equilibrium (P < 0.05). Cumulative discrimination power (DP) calculated with observed genotype frequencies was 0.99999789. Match probability of an individual in the reference population with a random individual in seven loci ranged from 7.34 x 10(-9) to 2.77 x 10(-5). This suggests that combining the seven microsatellite loci provides desirable power to individualize tigers. The combination of seven loci was applied to a case of tiger bone smuggling. Genotypes of all samples were identical in all seven loci, and the P(M) of the evidence samples in the seven loci hit 5.63 x 10(-7), provided evidence that the bones belong to a single tiger.     

Patterns of genetic polymorphism at the 10 X-chromosome STR loci in Mongol population

Genetic diversity at 10 X-chromosome STR loci has been approved and widely used for forensic science field. In this paper, we have studied this genetic diversity in various Mongol ethnic group with geographic backgrounds. Allele frequencies of 10 X-chromosome STR loci, including DXS7133, DXS6799, DXS8378, DXS7423, DXS6804, HPRTB, DXS7424, DXS7132, DXS6789 and DXS101, were obtained from healthy unrelated individuals (53 females and 47 males) of Mongol ethnic group lived in north China. Gene diversity analysis showed that the average heterozygosity was uniformly high (0.687) in the studied population. The coefficient of PIC was 0.99998.     

华东地区汉族人群D2S1399和D5S2500基因座的遗传多态性研究

目的研究D2S1399和D5S2500基因座在中国华东地区汉族群体遗传多态性。方法应用PCR、聚丙烯酰胺垂直电泳及银染技术检测D2S1399和D5S2500基因座的遗传多态性。结果D2S1399和D5S2500基因座在中国华东汉族群体分别检出11个和9个等位基因,其观察杂合度(Ho)分别为0.745和0.807,多态信息含量(PIC)分别为0.850和0.750,个体识别能力(DP)分别为0.958和0.917,非父排除率(PE)分别为0.554和0.643。结论D2S1399和D5S2500两个基因座是高度多态性STR基因座,在法医学中有重要应用价值。     

贵州汉族19个STR基因座多态性及法医学应用

目的调查19个常染色体STR基因座在贵州汉族人群中的等位基因分布,评估其在法医学中的应用价值。方法应用Goldeneye~(TM) DNA身份鉴定系统20A试剂盒,研究贵州520名汉族无关健康个体19个常染色体STR基因座多态性。用310型遗传分析仪进行毛细管电泳,Gene Mapper~ID v3.1进行基因分型。结果 19个常染色体STR基因座的杂合度为0.603 8~0.916 4,个体识别率为0.790 0~0.985 6,非父排除率为0.295 5~0.826 9,多态信息含量为0.553 5~0.908 9,累积个体识别率为1-1.230 0×10~(-22),累积非父排除率为0.999 999 99。贵州汉族和其他五个地域的汉族两两之间等位基因频率比较,仅贵州汉族与山东汉族、辽宁汉族、山西汉族之间存在基因频率差异具有统计学意义。结论 D19S433等19个常染色体STR基因座在贵州汉族人群中具有良好的遗传多态性,对群体遗传学和法医物证学研究有应用价值。     

藏獒犬11个STR基因座遗传多态性

目的建立犬STR复合扩增体系,为犬个体识别和亲权鉴定提供一种检测方法。方法用自行建立的11个犬STR基因座复合扩增体系,使用ABI3130XL遗传分析仪,对107份藏獒唾液DNA样本的扩增产物进行检测及统计学分析。结果除1个基因座杂合度低于60%,其他10个基因座杂合度均高于70%;11个基因座PIC值均在0.6以上;11个基因座中有8个基因座的个体识别率在0.938以上,其余3个基因座均在0.826以上;父权排除率除TETRA为0.267,其余在0.401~0.749之间,偶合机率1.08×10-13。结论此11个犬STR基因座在藏獒犬中具有较高的个体识别能力,可用于犬类个体识别和亲权鉴定。     

Mitochondrial DNA sequencing of cat hair: an informative forensic tool

Approximately 81.7 million cats are in 37.5 million U.S. households. Shed fur can be criminal evidence because of transfer to victims, suspects, and/or their belongings. To improve cat hairs as forensic evidence, the mtDNA control region from single hairs, with and without root tags, was sequenced. A dataset of a 402-bp control region segment from 174 random-bred cats representing four U.S. geographic areas was generated to determine the informativeness of the mtDNA region. Thirty-two mtDNA mitotypes were observed ranging in frequencies from 0.6-27%. Four common types occurred in all populations. Low heteroplasmy, 1.7%, was determined. Unique mitotypes were found in 18 individuals, 10.3% of the population studied. The calculated discrimination power implied that 8.3 of 10 randomly selected individuals can be excluded by this region. The genetic characteristics of the region and the generated dataset support the use of this cat mtDNA region in forensic applications.     

1066例新疆汉族人群21个常染色体STR基因座遗传多态性分析

目的研究21个常染色体STR基因座(CSF1PO,D3S1358,D5S818,D7S820,D8S1179,D13S317,D16S539,D18S51,D21S11,FGA,TH01,VWA,D2S1338,D19S433,D1S1656,D12S391,D2S441,D10S1248,TPOX,D22S1045,SE33)在新疆汉族人群中的遗传多态性。方法用GlobalFiler^TM R PCR Amplification荧光标记试剂盒对1066例新疆汉族无关个体的DNA进行PCR扩增,3500遗传分析仪电泳分析,用GeneMapper■ID-X v1.4软件分析等位基因片段大小,用Modified-Powerstates和Arlequin v3.5分析软件进行等位基因频率和法医学常用参数统计分析。结果在新疆汉族人群中,21个常染色体STR基因座不存在连锁不平衡现象,基因型分布符合Hardy–Weinberg平衡,共检出282个等位基因和1147种基因型,杂合度期望值(He)范围从0.6291(TPOX)到0.9428(SE33),多态信息含量(PIC)范围从0.5648(TPOX)到0.9393(SE33),累计个体识别率(CDP)>0.99999999999999999999。结论新疆汉族人群21个常染色体STR基因座具有较高多态性,可以用于法医学亲权鉴定和个体识别,也可以用于人类学和遗传学研究。     

STR遗传多态性调查中样本量和采样方式选择初探

目的对STR基因座进行遗传学调查时样本量大小和采样方式进行考察分析。方法用DNA Typer~(TM)19试剂盒对血卡样本进行直扩,ABI3730型遗传分析仪电泳检测,Genemapper ID v3.2软件进行等位基因分型,根据公式计算群体遗传学参数。计算样本量在50、100、150、200、250、300、350、400、450、500十个水平上遗传多态性水平,并评估与总体的差异。计算常见的四种采样方法(整群采样、随机采样、系统采样、分层采样)所抽取样本遗传多态性水平,并评估抽样误差。结果 18个STR基因座在河北地区16 058份随机样本共检出317种等位基因,基因频率分布在3.114e-5~0.515。18个STR基因座在河北群体水平上PM为6.04e-14,TDP为0.999 999 999 999 94,CEP为0.999 999 987 514 828。PM值、CEP值在样本量大于200后中值基本稳定。四种抽样方法的抽样误差大小是:整群抽样≥单纯随机抽样≥系统抽样≥分层抽样。结论 DNATyper~(TM)19试剂盒的18个STR基因座在河北地区具有较高的遗传多态性水平。在小范围内进行人群频率调查时,可随机选择200份样本代表当地遗传多态性水平。在相对较大范围或遗传背景复杂的区域,可采用分层抽样的方法降低抽样误差。     

Efficiency Analysis of EX16 +10Y Kit on Detection of the Uygur Population in Xinjiang ProvinceCSCD

Objective: To analyse the efficiency of EX16+10Y kit on the forensic detection of the Uygur in Xinjiang province. Methods: The blood samples were extracted from 4 620 male individuals of Uygur in Xinjiang province, and amplified by EX16+10Y kit. The typing of amplification products was performed by 3130xl genetic analyzer. Results: The genotyping graphs of 15 autosomal STR loci and 10 Y -chromosomal STR loci from 4 620 male individuals of Uygur in Xinjiang province were acquired completely. The genotype distribution of 15 autosomal STR loci was consistent with Hardy-Weinberg equilibrium. The heterozygosity, polymorphism information content and discrimination power of STR loci were 0.637-0.838, 0.580-0.860 and 0.811-0.978, respectively. There were 766 haplotypes in 10 Y -chromosomal STR loci. Conclusion: The test results of EX16+10Y kit is accurate and trustworthy, which can simultaneously be used for the individual identification and the screening of paternal pedigree in practical work. © 2018 by the Editorial Department of Journal of Forensic Medicine.