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塔克拉玛干沙漠腹地隔离人群线粒体DNA序列多态性分析 总被引:13,自引:0,他引:13
对新疆塔克拉玛干沙漠腹地的75名克里雅人线粒体DNA的高可变I区的15996—16401的片段进行了序列分析,在所测定的75个个体中,共检测到68个位点存在变异,界定了71种不同的单倍型。克里雅人群的核昔酸变异度和平均核苷酸差异都介于所报道的东方人群和西方人群之间。根据Neighbor-joining法构建系统发育树,发现中亚的各人群均处于东方人群的亚洲谱系和西方人群的欧洲谱系之间,并且克里雅与新疆维吾尔和境外维吾尔之间的遗传距离最近,表明他们之间有很密切的亲缘关系。 相似文献
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目的:研究新疆尉犁县的现代罗布人群线粒体DNAD-loop区序列遗传多态性,并初步探讨现代罗布人群和其他人群的亲缘关系。方法:应用PER扩增直接测序法,对23个所测定的个体序列采用ClustalX、Mega3.1、hrlequin等软件包进行分析。结果:23个个体中,共检测到47个变异位点,界定了22种不同的单倍型,计算出偶合概率P值为0.05482,变异度h值为0.99604。结论:现代罗布人与中亚各民族的亲缘关系很近,尤其是与新疆维吾尔族有很近的亲缘关系。 相似文献
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贵州四个民族人群线粒体DNA Region V的遗传多态性 总被引:2,自引:0,他引:2
目的研究世居贵州的侗族、仡佬族、土家族和彝族人群线粒体DNA Region V的遗传多态性。方法采用PCR-PAGE和克隆测序法对4个群体108份样本的mtDNA Region V进行序列分析。结果只检测到标准型和短型(即9-bp缺失)两种多态。贵州四个民族人群的平均9-bp缺失频率为22.2%,在侗族、仡佬族、土家族和彝族人群中依次为32.1%、22.6%、17.2%和15.0%。结论贵州四个民族mtDNA9-bp缺失频率均较高,这与其地域分布相一致;贵州彝族和土家族显示了相似的缺失频率,提示两者可能有共同的祖先。 相似文献
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目的研究世居贵州的侗族、仡佬族、土家族和彝族人群线粒体DNA RegionⅤ的遗传多态性。方法采用PCR-PAGE和克隆测序法对4个群体108份样本的mtDNA RegionⅤ进行序列分析。结果只检测到标准型和短型(即9-bp缺失)两种多态。贵州四个民族人群的平均9-bp缺失频率为22.2%,在侗族、仡佬族、土家族和彝族人群中依次为32.1%、22.6%、17.2%和15.0%。结论贵州四个民族mtDNA 9-bp缺失频率均较高,这与其地域分布相一致;贵州彝族和土家族显示了相似的缺失频率,提示两者可能有共同的祖先。 相似文献
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贵州水族人群线粒体DNA序列多态分析 总被引:11,自引:0,他引:11
研究了我国贵州水族64个个体线粒体DNA控制区第一高变区序列的变异情况,在所测定的495bp序列中,共检测到73个点存在变异,界定了48种不同的单倍型,单倍型的系统发育分析表明水族中存在一些古老的单倍型类型,并且其中的几个单倍型在欧亚人群中也存在分布,来自群体历史动态分析估算的水族群体扩张时间距今约6万年,这些结果提示水族是一个古老的民族群体,结合前期测定的广西壮族以及其他报道的民族人群的比较分析发现,水族在总体上表现出与壮族相近,但又不同于壮族这一典型的南方民族群体。 相似文献
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耐力运动员及普通人群线粒体DNA调控区遗传多态性分析 总被引:13,自引:0,他引:13
目的:通过PCR技术对优秀耐力项目运动员以及普通个体的mtDNA调控区遗传多态性进行分析,以期发现与运动能力相关联的基因标记。方法:以单根毛发为检材,运用PCR技术分析中国优秀耐力性项目运动员(n=67),一般水平运动员(n=33)以及普通人群(n=20)的线粒体DNA调控区(D-Loop)的RFLP。结果:优秀耐力性项目运动员线粒体特定区域RFLP分布与普通人群至显著性差异。结论:一些在优秀运动 相似文献
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中国牦牛线粒体DNA多态性及遗传分化 总被引:24,自引:3,他引:24
用20种限制性内切酶分析了我国5个牦牛群体90个个体的限制性片段长度多态性,其中AvaI,AvaII、BglII、EcoRI.HindIII、HpaI6个酶切类型具有多态性,共发现5种mtDNA单倍型,每种单倍型中检出50-55个位点,并利用双酶切制定出其物理图谱。我国牦牛群体mtDNA多样度HT为0.1065,群体内的平均一致性概率为0.8966,表明我国牦牛群体mtDNA多态性较贫乏,群体间的平均净遗传距离Pet为0.000201,群体基因分化系数Gst为0.0291,我国牦牛群体mtDNA变异只有2.91%来自群体间的差异,群体间的分化程度较低。并根据报道,比较了牦牛和其他家养牛种的mtDNA遗传分化,估计出牦牛和普通牛、瘤牛的分化时间大约分别在1.1-2.2百万年和1.01-1.02百万年之间。 相似文献
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贵州汉族,苗族,布依族和水族人群线粒体DNA多态性研究 总被引:15,自引:2,他引:13
本文运用16种限制性内切酶对来自贵州的汉族、苗族、布依族和水族的150个样本进行了mtDNA的限制性片段长度多态性(RFLP)分析。共检测到31种限制性格局(Restrictionpattern),其中HaeII-13型、EcoRV-3型和PstI-4型3种限制性格局为新报道综合这些限制性格局,共得出28种mtDNA类型(mtDNAtype)。运用UPG法和简约法分析了各mtDNA类型之间、各人群之间的聚类关系,结果表明:水族人群的mtDNA变异度较大;汉族和苗族的亲缘关系最近,布依族和水族有着较远的亲缘关系。 相似文献
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人癌细胞线粒体DNA控制区序列特征分析 总被引:8,自引:2,他引:8
胡义德 钱桂生 李淑平 陈维中 毛宝龄HU Yide QIAN Gui-sheng LI Shu-ping CHEN Wei-zhong MAO Bao-ling 《遗传》1999,21(4):1-5
为了探讨癌细胞mtDNA控制区序列的变化特征, 采用PCR产物限制性片段长度多态性(PCR-RFLP)分析与直接测序相结合的方法,对比分析6株人癌细胞系、 6例癌患者及4例健康成人白细胞mtDNA控制区序列。发现第16519位T→C、16 534位A→G、46位T→G和49位A→C突变, 在癌细胞系和癌患者白细胞mtDNA中分别占50%(3/6)和33.3%(2/6), 健康成人白细胞mtDNA中未见此类型突变;第16 278位C→T突变,在癌细胞系mtDNA中占50%(3/6),显著高于正常人群mtDNA中此位点的多态性变异。表明癌细胞和癌患者白细胞mtDNA重链复制起点及其 相邻D环区的特征性突变可能与细胞癌变/或癌的易感性有关。
Abstract: To explore the sequence feature of mitochondrial DNA(mtDNA) control region in human carcinoma cells, polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) and direct sequence techniques were used to analyze the sequence of mtDNA control region of 6 human carcinoma cell lines versus white blood cells which from 6 tumor patients and 4 normal adults. The T to C mutation at np 16 519, A to G mutation at np 16 534, T to G mutation at np 46, and A to C mutation at np 49 was found in 50% (3/6 cases) of carcinoma cell lines and in 33.3%(2/6 cases) of tumor patients, but it was not found in normal adults. The C to T mutation at np 16 278 was found in 50%(3/6 cases) of carcinoma cell lines, it was significantly higher than that of the polymorphism of normal population. These findings suggest that the typical mutation in the starting area of heavy-strand replication and the first half of D-loop region might probably be associated with carcinogenesis or susceptibility of carcinoma. 相似文献
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DiMauro S 《Bioscience reports》2007,27(1-3):5-9
The small, maternally inherited mitochondrial DNA (mtDNA) has turned out to be a hotbed of pathogenic mutations: 15 years
into the era of ‘mitochondrial medicine’, over 150 pathogenic point mutations and countless rearrangements have been associated
with a variety of multisystemic or tissue-specific human diseases. MtDNA-related disorders can be divided into two major groups:
those due to mutations in genes affecting mitochondrial protein synthesis in toto and those due to mutations in specific protein-coding
genes. Here we review the mitochondrial genetics and the clinical features of the mtDNA-related diseases. 相似文献
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Li H Cai X Winograd-Cort ER Wen B Cheng X Qin Z Liu W Liu Y Pan S Qian J Tan CC Jin L 《American journal of physical anthropology》2007,134(4):481-488
Mitochondrial DNA (mtDNA) polymorphism has been studied systematically in the Han, Tibeto-Buman, and Hmong-Mien ethnic families of southern East Asia. Only two families in this region, Daic and Austro-Asiatic, were still uninvestigated. Daic is a major ethnic family in South China and Southeast Asia and has a long history. To study mtDNA polymorphism within this family, all the Daic populations of China and some of Vietnam (774 individuals from 30 populations) were typed by HVS-1 region sequencing and by PCR-RFLP assays. The observed high Southern type frequencies (B, F, M7, R) confirmed Daic as a typical Southern group. mtDNAs of other populations (126 individuals from 14 populations) from Austro-Asiatic ethnic families neighboring the Daic were also typed. Networks of mtDNA haplogroups in South China were traced from these new data and those from the literature. Ethnic families share many haplogroups, indicating their common origin. However, the two largest families in South China, Daic, and Hmong-Mien, polarized into several ethnic family specific haplogroups. Haplogroup ages were estimated in the networks of high-frequency haplogroups (B, F, M7, R), and they were found to originate about 50,000 years ago. In contrast, ethnic family specific haplogroups all originated around 20,000 years ago. We therefore conclude that modern humans have lived in South China for a long time, inside-ethnogenesis was a rather late event, and frequent inmixing was taking place throughout. MtDNA data of Daic, Austro-Asiatic and other populations in South China has therefore proven pivotal for studying the human history of East Asia. 相似文献
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哺乳动物线粒体DNA(mitochondrial DNA, mtDNA)位于线粒体.当细胞中mtDNA发生突变时,就会出现野生型与突变型mtDNA的共存.这种情况被称为mtDNA异质性.从mtDNA异质性的形成到在表型上引起相应的病变是一个复杂的过程.mtDNA异质性是如何形成和其在特异组织的增殖复制,mtDNA异质性的变化对个体的影响,如何提高mtDNA突变负荷检测的精度和灵敏度都是近些年的研究热点.本文对mtDNA异质性的检测、遗传、组织特异性以及其相关的疾病等方面进行了阐述. 相似文献