阿根廷巴塔哥尼亚西北部原住民种群的线粒体 DNA 多样性和进化史

4区 生物学 Q2 Medicine
M. Postillone, Virginia A. Cobos, Celmira Urrutia, C. Dejean, P. Gonzalez, S. Perez, Valeria Bernal
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引用次数: 0

摘要

长期以来,来自巴塔哥尼亚的美洲印第安人后裔的遗传组成一直是人们关注的焦点,尽管在许多地理区域可获得的信息仍然很少。在此,我们首次对巴塔哥尼亚西北部内乌肯北部地区的线粒体 DNA(mtDNA)控制区的变异进行了分析,旨在研究这些人类群体进化史的过程和历史事件。我们分析了来自内乌肯北部两个地方的 113 个个体,以及来自内乌肯南部的 6 个个体和以前发表的来自阿根廷和智利邻近地区的 223 个 mtDNA 序列。我们估计了分子变异的单倍型变异和空间结构。在来自内乌肯北部的两个样本(n = 70)中,美洲印第安人亚单倍群占主导地位,其中 D1g 和 C1b13 代表性最强,但比例不同。这些样本的美洲印第安人 mtDNA 单倍型与邻近地区的变异相似。单倍型的变异大多发生在群体内部;群体之间的变异相对较少,而且与地理空间的关系不大。内乌肯省北部最常见的亚单倍群具有巴塔哥尼亚和智利阿劳卡尼亚原住民的特征,可能起源于晚更新世或全新世早期。然而,mtDNA单倍型的空间变异偏离了纬度模式,表明在全新世晚期,不同地区之间的基因流动程度不同,内乌肯北部以及该地区与智利、内乌肯南部和里奥内格罗的邻近人群之间的基因流动程度适中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mitochondrial DNA Diversity and Evolutionary History of Native Human Populations of Argentinean Northwest Patagonia
The genetic composition of Amerindian descendants from Patagonia has long been a focus of interest, although the information available is still scarce for many geographic areas. Here, we report the fijirst analysis of the variation in the mitochondrial DNA (mtDNA) control region for an area of northwestern Patagonia, the North of Neuquén, with the aim of studying the processes and historical events that modeled the evolutionary history of these human groups. We analyzed 113 individuals from two localities of northern Neuquén, along with 6 from southern Neuquén and 223 previously published mtDNA sequences from neighboring areas in Argentina and Chile. We estimated the haplotypic variation and spatial structure of molecular variability. Amerindian subhaplogroups predominate in the two samples from northern Neuquén (n = 70), with D1g and C1b13 the most represented, although in diffferent proportions. These samples exhibit Amerindian mtDNA haplotypes similar to the variants from neighboring areas. Most of haplotype variability was within group; variation among groups was relatively low and scarcely associated with geographical space. The most frequent subhaplogroups in northern Neuquén are characteristic of native populations from Patagonia and Chilean Araucanía, and probably originated in the region during the Late Pleistocene or Early Holocene. However, the spatial variation of mtDNA haplotypes departs from a latitudinal pattern and suggests diffferential levels of gene flow among areas during the Late Holocene, with moderate levels across the North of Neuquén as well as between this area and neighboring populations from Chile, the South of Neuquén, and Río Negro.
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来源期刊
Human Biology
Human Biology 生物-生物学
CiteScore
1.90
自引率
0.00%
发文量
88
审稿时长
>12 weeks
期刊介绍: Human Biology publishes original scientific articles, brief communications, letters to the editor, and review articles on the general topic of biological anthropology. Our main focus is understanding human biological variation and human evolution through a broad range of approaches. We encourage investigators to submit any study on human biological diversity presented from an evolutionary or adaptive perspective. Priority will be given to interdisciplinary studies that seek to better explain the interaction between cultural processes and biological processes in our evolution. Methodological papers are also encouraged. Any computational approach intended to summarize cultural variation is encouraged. Studies that are essentially descriptive or concern only a limited geographic area are acceptable only when they have a wider relevance to understanding human biological variation. Manuscripts may cover any of the following disciplines, once the anthropological focus is apparent: human population genetics, evolutionary and genetic demography, quantitative genetics, evolutionary biology, ancient DNA studies, biological diversity interpreted in terms of adaptation (biometry, physical anthropology), and interdisciplinary research linking biological and cultural diversity (inferred from linguistic variability, ethnological diversity, archaeological evidence, etc.).
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