目的：调查广西黑衣壮族人群4个短串联重复序列(short tandem repeats,STR)基因座：D5S818、D7S820、D13S317、vWA的群体遗传分布资料,探讨7个民族间的遗传关系。方法：应用荧光标记STR基因扫描技术分析152名广西黑衣壮族无关个体。以...目的：调查广西黑衣壮族人群4个短串联重复序列(short tandem repeats,STR)基因座：D5S818、D7S820、D13S317、vWA的群体遗传分布资料,探讨7个民族间的遗传关系。方法：应用荧光标记STR基因扫描技术分析152名广西黑衣壮族无关个体。以遗传距离和系统发生树来分析7个民族间遗传关系。结果：4个STR基因座平均观察杂合度为0．7814；平均多态信息总量为0．7375；累积个体识别力达0．9928809,累积非父排除率达0．9928809。新疆乌孜别克族、新疆维吾尔族、甘肃裕固族、云南白族、广西黑衣壮族、浙江畲族聚为一群,东部蒙古族自成一群。结论：广西黑衣壮族的4个STR基因座属高度遗传多态性标记；新疆乌孜别克族和维吾尔族、广西黑衣壮族和浙江畲族遗传关系较近。展开更多
For a long time,classification of Demodex mites has been based mainly on their hosts and phenotypic characteristics.A new subspecies of Demodex folliculorum has been proposed,but not confirmed.Here,cox1 partial sequen...For a long time,classification of Demodex mites has been based mainly on their hosts and phenotypic characteristics.A new subspecies of Demodex folliculorum has been proposed,but not confirmed.Here,cox1 partial sequences of nine isolates of three Demodex species from two geographical sources(China and Spain) were studied to conduct molecular identification of D.folliculorum.Sequencing showed that the mitochondrial cox1 fragments of five D.folliculorum isolates from the facial skin of Chinese individuals were 429 bp long and that their sequence identity was 97.4%.The average sequence divergence was 1.24% among the five Chinese isolates,0.94% between the two geographical isolate groups(China(5) and Spain(1)),and 2.15% between the two facial tissue sources(facial skin(6) and eyelids(1)).The genetic distance and rate of third-position nucleotide transition/transversion were 0.0125,2.7(3/1) among the five Chinese isolates,0.0094,3.1(3/1) between the two geographical isolate groups,and 0.0217,4.4(3/1) between the two facial tissue sources.Phylogenetic trees showed that D.folliculorum from the two geographical isolate groups did not form sister clades,while those from different facial tissue sources did.According to the molecular characteristics,it appears that subspecies differentiation might not have occurred and that D.folliculorum isolates from the two geographical sources are of the same population.However,population differentiation might be occurring between isolates from facial skin and eyelids.展开更多
文摘目的：调查广西黑衣壮族人群4个短串联重复序列(short tandem repeats,STR)基因座：D5S818、D7S820、D13S317、vWA的群体遗传分布资料,探讨7个民族间的遗传关系。方法：应用荧光标记STR基因扫描技术分析152名广西黑衣壮族无关个体。以遗传距离和系统发生树来分析7个民族间遗传关系。结果：4个STR基因座平均观察杂合度为0．7814；平均多态信息总量为0．7375；累积个体识别力达0．9928809,累积非父排除率达0．9928809。新疆乌孜别克族、新疆维吾尔族、甘肃裕固族、云南白族、广西黑衣壮族、浙江畲族聚为一群,东部蒙古族自成一群。结论：广西黑衣壮族的4个STR基因座属高度遗传多态性标记；新疆乌孜别克族和维吾尔族、广西黑衣壮族和浙江畲族遗传关系较近。
基金Project(No. 81271856)supported by the National Natural Science Foundation of China
文摘For a long time,classification of Demodex mites has been based mainly on their hosts and phenotypic characteristics.A new subspecies of Demodex folliculorum has been proposed,but not confirmed.Here,cox1 partial sequences of nine isolates of three Demodex species from two geographical sources(China and Spain) were studied to conduct molecular identification of D.folliculorum.Sequencing showed that the mitochondrial cox1 fragments of five D.folliculorum isolates from the facial skin of Chinese individuals were 429 bp long and that their sequence identity was 97.4%.The average sequence divergence was 1.24% among the five Chinese isolates,0.94% between the two geographical isolate groups(China(5) and Spain(1)),and 2.15% between the two facial tissue sources(facial skin(6) and eyelids(1)).The genetic distance and rate of third-position nucleotide transition/transversion were 0.0125,2.7(3/1) among the five Chinese isolates,0.0094,3.1(3/1) between the two geographical isolate groups,and 0.0217,4.4(3/1) between the two facial tissue sources.Phylogenetic trees showed that D.folliculorum from the two geographical isolate groups did not form sister clades,while those from different facial tissue sources did.According to the molecular characteristics,it appears that subspecies differentiation might not have occurred and that D.folliculorum isolates from the two geographical sources are of the same population.However,population differentiation might be occurring between isolates from facial skin and eyelids.
