scholarly journals Integrating Linguistics, Social Structure, and Geography to Model Genetic Diversity within India

2021 ◽  
Author(s):  
Aritra Bose ◽  
Daniel E Platt ◽  
Laxmi Parida ◽  
Petros Drineas ◽  
Peristera Paschou
Keyword(s):  
Genetic Diversity ◽  
Social Structure ◽  
Genetic Drift ◽  
Social Stratification ◽  
Indian Subcontinent ◽  
Caste System ◽  
Population Substructure ◽  
Shared Language ◽  
Genetic Substructure ◽  
Shared Genetic

Abstract India represents an intricate tapestry of population substructure shaped by geography, language, culture and social stratification. While geography closely correlates with genetic structure in other parts of the world, the strict endogamy imposed by the Indian caste system and the large number of spoken languages add further levels of complexity to understand Indian population structure. To date, no study has attempted to model and evaluate how these factors have interacted to shape the patterns of genetic diversity within India. We merged all publicly available data from the Indian subcontinent into a dataset of 891 individuals from 90 well-defined groups. Bringing together geography, genetics and demographic factors, we developed COGG (Correlation Optimization of Genetics and Geodemographics) to build a model that explains the observed population genetic substructure. We show that shared language along with social structure have been the most powerful forces in creating paths of gene flow in the subcontinent. Furthermore, we discover the ethnic groups that best capture the diverse genetic substructure using a ridge leverage score statistic. Integrating data from India with a dataset of additional 1,323 individuals from 50 Eurasian populations we find that Indo-European and Dravidian speakers of India show shared genetic drift with Europeans, whereas the Tibeto-Burman speaking tribal groups have maximum shared genetic drift with East Asians.

scholarly journals Integrating linguistics, social structure, and geography to model genetic diversity within India

2017 ◽  
Author(s):  
Aritra Bose ◽  
Daniel E. Platt ◽  
Laxmi Parida ◽  
Petros Drineas ◽  
Peristera Paschou
Keyword(s):  
Genetic Diversity ◽  
Social Structure ◽  
Genetic Drift ◽  
Social Stratification ◽  
Indian Subcontinent ◽  
Caste System ◽  
Population Substructure ◽  
Data Set ◽  
Genetic Substructure ◽  
Shared Genetic

AbstractIndia represents an intricate tapestry of population substructure shaped by geography, language, culture and social stratification. While geography closely correlates with genetic structure in other parts of the world, the strict endogamy imposed by the Indian caste system and the large number of spoken languages add further levels of complexity to understand Indian population structure. To date, no study has attempted to model and evaluate how these factors have interacted to shape the patterns of genetic diversity within India. We merged all publicly available data from the Indian subcontinent into a data set of 891 individuals from 90 well-defined groups. Bringing together geography, genetics and demographic factors, we developed COGG (Correlation Optimization of Genetics and Geodemographics) to build a model that explains the observed population genetic substructure. We show that shared language along with social structure have been the most powerful forces in creating paths of gene flow in the subcontinent. Furthermore, we discover the ethnic groups that best capture the diverse genetic substructure highlighted by COGG. Integrating data from India with a data set of additional 1,323 individuals from 50 populations we find that Europeans show shared genetic drift with the Indo-European and Dravidian speakers of India, whereas the East Asians have the maximum shared genetic drift with Tibeto-Burman speaking tribal groups.

scholarly journals Trees, Population Structure, F-statistics!

2015 ◽  
Author(s):  
Benjamin M Peter
Keyword(s):  
Population Structure ◽  
Genetic Drift ◽  
Phylogenetic Trees ◽  
Population Substructure ◽  
Methodological Framework ◽  
Genetic Theory ◽  
Genetic History ◽  
Branch Lengths ◽  
Shared Genetic ◽  
F Statistics

Many questions about human genetic history can be addressed by examining the patterns of shared genetic variation between sets of populations. A useful methodological framework for this purpose are F-statistics, that measure shared genetic drift between sets of two, three and four populations, and can be used to test simple and complex hypotheses about admixture between populations. Here, we put these statistics in context of phylogenetic and population genetic theory. We show how measures of genetic drift can be interpreted as branch lengths, paths through an admixture graph or in terms of the internal branches in coalescent trees. We show that the admixture tests can be interpreted as testing general properties of phylogenies, allowing us to generalize applications for arbitrary phylogenetic trees. Furthermore, we derive novel expressions for the F-statistics, which enables us to explore the behavior of F-statistic under population structure models. In particular, we show that population substructure may complicate inference.

THE CONTRIBUTION OF THE AMARNA LETTERS TOWARDS A STUDY OF SYRO-PALESTINIAN SOCIAL STRUCTURE (1). TERMINOLOGY FOR GOVERNMENT OFFICIALS

2017 ◽  
Vol 25 (2) ◽  
pp. 788-832
Author(s):  
Lukas M. Muntingh
Keyword(s):  
Social Structure ◽  
Bronze Age ◽  
Social Stratification ◽  
Social Life ◽  
Upper Class ◽  
Government Officials ◽  
The Social ◽  
Amarna Letters ◽  
Free People ◽  
Shed Light

Egyptian domination under the 18th and 19th Dynasties deeply influenced political and social life in Syria and Palestine. The correspondence between Egypt and her vassals in Syria and Palestine in the Amarna age, first half of the fourteenth century B.C., preserved for us in the Amarna letters, written in cuneiform on clay tablets discovered in 1887, offer several terms that can shed light on the social structure during the Late Bronze Age. In the social stratification of Syria and Palestine under Egyptian rule according to the Amarna letters, three classes are discernible:1) government officials and military personnel, 2) free people, and 3) half-free people and slaves. In this study, I shall limit myself to the first, the upper class. This article deals with terminology for government officials.

Caste and Untouchability in Jawaharlal Nehru’s Literary Masterpieces

2021 ◽  
pp. 2455328X2110093
Author(s):  
Tahira Tashneem
Keyword(s):  
Social Structure ◽  
Caste System ◽  
Indian Culture ◽  
Complete Eradication ◽  
Political Discourses ◽  
The World

As one of the major pillars of Indian social structure, the caste system distinguishes Indian culture from all other cultures of the world. Though the Constitution of India assures equality of status and opportunity for all citizens and various academic and political discourses also appealed for the complete eradication of the caste system, it has not been eradicated even after five decades of democracy. In this context, it becomes really interesting to re-examine the views on caste as reflected in Jawaharlal Nehru’s prose writings. Nehru’s major prose works unquestionably delineate his concern for caste. Focusing mainly on An Autobiography and the Discovery of India, this article seeks to examine the different representations of caste in his prose works and will also try to locate the gaps and the shifts underlying his views on caste.

scholarly journals Heterozygous Trees Rebound the Fastest after Felling by Beavers to Positively Affect Arthropod Community Diversity

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 694
Author(s):  
Faith M. Walker ◽  
Rachel Durben ◽  
Stephen M. Shuster ◽  
Richard L. Lindroth ◽  
Thomas G. Whitham
Keyword(s):  
Genetic Diversity ◽  
Genetic Relatedness ◽  
Castor Canadensis ◽  
High Stress ◽  
Underlying Mechanism ◽  
Community Level ◽  
Community Diversity ◽  
Population Substructure ◽  
Individual Plant ◽  
Arthropod Community

Although genetic diversity within stands of trees is known to have community-level consequences, whether such effects are present at an even finer genetic scale is unknown. We examined the hypothesis that genetic variability (heterozygosity) within an individual plant would affect its dependent community, which adds a new dimension to the importance of genetic diversity. Our study contrasted foliar arthropod community diversity and microsatellite marker-derived measures of genetic diversity of cottonwood (Populus fremontii) trees that had been felled by beavers (Castor canadensis) and were resprouting, relative to adjacent standing, unfelled trees. Three patterns emerged: 1. Productivity (specific leaf area), phytochemical defenses (salicortin), and arthropod community richness, abundance, and diversity were positively correlated with the heterozygosity of individual felled trees, but not with that of unfelled trees; 2. These relationships were not explained by population substructure, genetic relatedness of the trees, or hybridization; 3. The underlying mechanism appears to be that beaver herbivory stimulates increased productivity (i.e., 2× increase from the most homozygous to the most heterozygous tree) that is the greatest in more heterozygous trees. Salicortin defenses in twigs were also expressed at higher concentrations in more heterozygous trees (i.e., 3× increase from the most homozygous to the most heterozygous tree), which suggests that this compound may dissuade further herbivory by beavers, as has been found for other mammalian herbivores. We suggest that high stress to trees as a consequence of felling reveals a heterozygosity–productivity linkage, which in turn is attractive to arthropods. Although experiments are required to demonstrate causality, these results link the genetic diversity of individual trees to community diversity, supporting the hypothesis that interactions among foundation species (beavers and trees) have community-level effects, and underscores the importance of genetic diversity for biodiversity, conservation, and restoration.

scholarly journals Effect of social structure and introduction history on genetic diversity and differentiation

2021 ◽  
Author(s):  
Sylvia M. Flucher ◽  
Patrick Krapf ◽  
Wolfgang Arthofer ◽  
Andrew V. Suarez ◽  
Ross H. Crozier ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Social Structure ◽  
Introduction History

scholarly journals Microsatellite analysis reveals low genetic diversity in managed populations of the critically endangered gharial (Gavialis gangeticus) in India

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Surya Prasad Sharma ◽  
Mirza Ghazanfarullah Ghazi ◽  
Suyash Katdare ◽  
Niladri Dasgupta ◽  
Samrat Mondol ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Indian Subcontinent ◽  
Population Decline ◽  
Mitochondrial Control Region ◽  
Critically Endangered ◽  
Term Survival ◽  
Low Level ◽  
Genetic Status ◽  
In The Wild ◽  
Gavialis Gangeticus

AbstractThe gharial (Gavialis gangeticus) is a critically endangered crocodylian, endemic to the Indian subcontinent. The species has experienced severe population decline during the twentieth century owing to habitat loss, poaching, and mortalities in passive fishing. Its extant populations have largely recovered through translocation programmes initiated in 1975. Understanding the genetic status of these populations is crucial for evaluating the effectiveness of the ongoing conservation efforts. This study assessed the genetic diversity, population structure, and evidence of genetic bottlenecks of the two managed populations inhabiting the Chambal and Girwa Rivers, which hold nearly 80% of the global gharial populations. We used seven polymorphic nuclear microsatellite loci and a 520 bp partial fragment of the mitochondrial control region (CR). The overall mean allelic richness (Ar) was 2.80 ± 0.40, and the observed (Ho) and expected (He) heterozygosities were 0.40 ± 0.05 and 0.39 ± 0.05, respectively. We observed low levels of genetic differentiation between populations (FST = 0.039, P < 0.05; G’ST = 0.058, P < 0.05 Jost’s D = 0.016, P < 0.05). The bottleneck analysis using the M ratio (Chambal = 0.31 ± 0.06; Girwa = 0.41 ± 0.12) suggested the presence of a genetic bottleneck in both populations. The mitochondrial CR also showed a low level of variation, with two haplotypes observed in the Girwa population. This study highlights the low level of genetic diversity in the two largest managed gharial populations in the wild. Hence, it is recommended to assess the genetic status of extant wild and captive gharial populations for planning future translocation programmes to ensure long-term survival in the wild.

scholarly journals Theoretical and Methodological Approaches to the Study of Social Structure: Western Ideas in Domestic Practice

2020 ◽  
Author(s):  
Iuliia Nikolaevna Soloveva
Keyword(s):  
Social Structure ◽  
Social Stratification ◽  
Russian Society ◽  
Accurate Analysis ◽  
Factors Influencing ◽  
Structure Changes ◽  
The Social ◽  
Domestic Practice ◽  
Methodological Approaches ◽  
Selection Of

The study of the social structure of society involves the selection of features that determine social stratification. The variety of these features contributes to the emergence of a large number of theoretical and methodological approaches. The article examines the most significant approaches for studying the social structure of Russian society based on the ideas of representatives of Western sociology: from class theories to theories of social stratification. In the process of transformation of society, not only the structure changes, but also the factors influencing it, which leads to the emergence of new approaches for the most complete and accurate analysis.

scholarly journals SOCIAL STRUCTURE OF ANCIENT RUSSIA

2022 ◽  
pp. 25-29
Author(s):  
Алена Владимировна Искрина
Keyword(s):  
Social Structure ◽  
Social Stratification ◽  
Early Stage ◽  
The State ◽  
Historical Period ◽  
Historical Events ◽  
Main Research ◽  
Stage Of Development ◽  
Political Events ◽  
The Social

В статье рассматриваются особенности формирования социальной стратификации Древней Руси на раннем этапе развития, этапы появления различных страт в зависимости от социально-политических событий с X по XII вв. Предметом исследования является процесс образования социальных страт в древнерусском государстве. Цель статьи - рассмотреть социальное устройство Древней Руси, определить и описать стратификацию и взаимодействие страт между собой, историю изучения данного вопроса, политические события, влияющие на данные процессы. Основным вопросом исследования явились исторические события, оказавшие влияние на формирование социальных страт с X по XII вв., появление социальных страт в данный исторический период и формы их взаимодействия. Отвечая на данный вопрос, автор приходит к выводу, что разложение патриархально-общинного строя, формирование феодального вассалитета, принципа майората, княжеской дружины и другие внутриполитические события повлияли на формирование социальных страт государства. В связи с данными историческими событиями удается проследить этапы происхождения социальных слоев населения, их состав, социальные функции в обществе и государстве. The paper examines the features of the social stratification of the Ancient system at an early stage of development, the stages of the emergence of various strata depending on political events from the 10th to the 12th centuries. The subject of this research is the process of the formation of social strata in the ancient European state. The purpose of the publication is to consider the social structure of Ancient Rus, to determine and describe the stratification and interaction of strata with each other, to study this issue, political events that affect these processes. The main research issue was the historical events that influenced the formation of social strata from the 10th to the 12th centuries, the emergence of social strata in a given historical period and the forms of their interaction. Answering this question, the author arrives at the conclusion that the disintegration of the patriarchal-communal system, the formation of a feudal vassalage, the principle of primacy, the princely squad and other internal political events influenced the formation of social strata of the state. In connection with these historical events, it is possible to trace the stages of the origin of social strata of the population, their composition, social functions in society and the state.

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