Evolutionary history of the mtDNA 9-bp deletion in Chinese populations and its relevance to the peopling of east and southeast Asia

2000 ◽  
Vol 107 (5) ◽  
pp. 504-512 ◽  
Author(s):  
Yong-Gang Yao ◽  
W. Watkins ◽  
Ya-Ping Zhang
Keyword(s):  
Southeast Asia ◽  
Evolutionary History ◽  
Chinese Populations ◽  
East And Southeast Asia ◽  
History Of

scholarly journals Out of Asia: Mitochondrial evolutionary history of the globally introduced supralittoral isopod Ligia exotica

2017 ◽  
Author(s):  
Luis A Hurtado ◽  
Mariana Mateos ◽  
Chang Wang ◽  
Carlos A Santamaria ◽  
Jongwoo Jung ◽  
...  
Keyword(s):  
Southeast Asia ◽  
16S Rdna ◽  
Evolutionary History ◽  
Phylogenetic Analyses ◽  
Marine Species ◽  
Genetic Lineages ◽  
East And Southeast Asia ◽  
History Of ◽  
Marine Vessels ◽  
Establishment Process

The native ranges and invasion histories of many marine species remain elusive due to a dynamic dispersal process via marine vessels. Molecular markers can aid in identification of native ranges and elucidation of the introduction and establishment process. The supralittoral isopod Ligia exotica has a wide tropical and subtropical distribution, frequently found in harbors and ports around the globe. This isopod is hypothesized to have an Old World origin, from where it was unintentionally introduced to other regions via wooden ships and solid ballast. Its native range, however, remains uncertain. Recent molecular studies uncovered the presence of two highly divergent lineages of L. exotica in East Asia, and suggest this region is a source of nonindigenous populations. In this study, we conducted phylogenetic analyses (Maximum Likelihood and Bayesian) of a fragment of the mitochondrial 16S ribosomal (r)DNA gene using a dataset of this isopod that greatly expanded previous representation from Asia and putative nonindigenous populations around the world. For a subset of samples, sequences of 12S rDNA and NaK were also obtained and analyzed together with 16S rDNA. Our results show that L. exotica is comprised of several highly divergent genetic lineages, which probably represent different species. Most of the 16S rDNA genetic diversity (48 haplotypes) was detected in East and Southeast Asia. Only seven haplotypes were observed outside this region (in the Americas, Hawai’i, Africa and India), which were identical or closely related to haplotypes found in East and Southeast Asia. Phylogenetic patterns indicate the L. exotica clade originated and diversified in East and Southeast Asia, and only members of one of the divergent lineages have spread out of this region, recently, suggesting the potential to become invasive is phylogenetically constrained.

scholarly journals Out of Asia: mitochondrial evolutionary history of the globally introduced supralittoral isopodLigia exotica

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4337 ◽  
Author(s):  
Luis A. Hurtado ◽  
Mariana Mateos ◽  
Chang Wang ◽  
Carlos A. Santamaria ◽  
Jongwoo Jung ◽  
...  
Keyword(s):  
Southeast Asia ◽  
16S Rdna ◽  
Evolutionary History ◽  
Phylogenetic Analyses ◽  
Marine Species ◽  
Genetic Lineages ◽  
East And Southeast Asia ◽  
History Of ◽  
Marine Vessels ◽  
Establishment Process

The native ranges and invasion histories of many marine species remain elusive due to a dynamic dispersal process via marine vessels. Molecular markers can aid in identification of native ranges and elucidation of the introduction and establishment process. The supralittoral isopodLigia exoticahas a wide tropical and subtropical distribution, frequently found in harbors and ports around the globe. This isopod is hypothesized to have an Old World origin, from where it was unintentionally introduced to other regions via wooden ships and solid ballast. Its native range, however, remains uncertain. Recent molecular studies uncovered the presence of two highly divergent lineages ofL. exoticain East Asia, and suggest this region is a source of nonindigenous populations. In this study, we conducted phylogenetic analyses (Maximum Likelihood and Bayesian) of a fragment of the mitochondrial 16S ribosomal (r)DNA gene using a dataset of this isopod that greatly expanded previous representation from Asia and putative nonindigenous populations around the world. For a subset of samples, sequences of 12S rDNA and NaK were also obtained and analyzed together with 16S rDNA. Our results show thatL. exoticais comprised of several highly divergent genetic lineages, which probably represent different species. Most of the 16S rDNA genetic diversity (48 haplotypes) was detected in East and Southeast Asia. Only seven haplotypes were observed outside this region (in the Americas, Hawai’i, Africa and India), which were identical or closely related to haplotypes found in East and Southeast Asia. Phylogenetic patterns indicate theL. exoticaclade originated and diversified in East and Southeast Asia, and only members of one of the divergent lineages have spread out of this region, recently, suggesting the potential to become invasive is phylogenetically constrained.

scholarly journals Out of Asia: Mitochondrial evolutionary history of the globally introduced supralittoral isopod Ligia exotica

2017 ◽  
Author(s):  
Luis A Hurtado ◽  
Mariana Mateos ◽  
Chang Wang ◽  
Carlos A Santamaria ◽  
Jongwoo Jung ◽  
...  
Keyword(s):  
Southeast Asia ◽  
16S Rdna ◽  
Evolutionary History ◽  
Phylogenetic Analyses ◽  
Marine Species ◽  
Genetic Lineages ◽  
East And Southeast Asia ◽  
History Of ◽  
Marine Vessels ◽  
Establishment Process

The native ranges and invasion histories of many marine species remain elusive due to a dynamic dispersal process via marine vessels. Molecular markers can aid in identification of native ranges and elucidation of the introduction and establishment process. The supralittoral isopod Ligia exotica has a wide tropical and subtropical distribution, frequently found in harbors and ports around the globe. This isopod is hypothesized to have an Old World origin, from where it was unintentionally introduced to other regions via wooden ships and solid ballast. Its native range, however, remains uncertain. Recent molecular studies uncovered the presence of two highly divergent lineages of L. exotica in East Asia, and suggest this region is a source of nonindigenous populations. In this study, we conducted phylogenetic analyses (Maximum Likelihood and Bayesian) of a fragment of the mitochondrial 16S ribosomal (r)DNA gene using a dataset of this isopod that greatly expanded previous representation from Asia and putative nonindigenous populations around the world. For a subset of samples, sequences of 12S rDNA and NaK were also obtained and analyzed together with 16S rDNA. Our results show that L. exotica is comprised of several highly divergent genetic lineages, which probably represent different species. Most of the 16S rDNA genetic diversity (48 haplotypes) was detected in East and Southeast Asia. Only seven haplotypes were observed outside this region (in the Americas, Hawai’i, Africa and India), which were identical or closely related to haplotypes found in East and Southeast Asia. Phylogenetic patterns indicate the L. exotica clade originated and diversified in East and Southeast Asia, and only members of one of the divergent lineages have spread out of this region, recently, suggesting the potential to become invasive is phylogenetically constrained.

scholarly journals There and back again: What the Cold War for Southeast Asia can teach us about Sino-US competition in the region today

2019 ◽  
Vol 74 (2) ◽  
pp. 301-312
Author(s):  
Wen-Qing Ngoei
Keyword(s):  
Cold War ◽  
Southeast Asia ◽  
Foreign Relations ◽  
Critical Role ◽  
The United States ◽  
The Us ◽  
East And Southeast Asia ◽  
History Of ◽  
Expert Commentary ◽  
The Cold War

This essay examines how the history of the Cold War in Southeast Asia has shaped, and will likely continue to shape, the current Sino-US rivalry in the region. Expert commentary today typically focuses on the agendas and actions of the two big powers, the United States and China, which actually risks missing the bigger picture. During the Cold War, leaders of ASEAN (Association of Southeast Asian Nations) played a critical role in containing Chinese influence, shaping the terms of Sino-US competition and rapprochement, and deepening the US presence in Southeast Asia. The legacy of ASEAN’s foreign relations during and since the Cold War imposes constraints on Chinese regional ambitions today, which militates against the popular notion that Chinese hegemony in East and Southeast Asia is inevitable. This essay underscores that current analyses of the brewing crisis in and around the South China Sea must routinely look beyond the two superpowers to the under-appreciated agency of small- and middle-sized ASEAN actors who, in reality, are the ones who hold the fate of the region in their hands.

Characteristics and evolutionary history of hepatitis B virus quasi-subgenotype B3 in Southeast Asia

2019 ◽  
Vol 273 ◽  
pp. 197762 ◽  
Author(s):  
Jianmei Gao ◽  
Rongxia Zuo ◽  
Jinli Wang ◽  
Tao Shen
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Southeast Asia ◽  
Evolutionary History ◽  
B Virus ◽  
History Of

The Regional Centrality of Vietnam’s Central Highlands

2018 ◽  
Author(s):  
Oscar Salemink
Keyword(s):  
Southeast Asia ◽  
Local Population ◽  
Forest Products ◽  
The United States ◽  
Colonial Era ◽  
Strategic Value ◽  
East And Southeast Asia ◽  
History Of ◽  
Central Highlands ◽  
Local Leaders

Vietnam’s Central Highlands—or Tây Nguyên—area is usually described as remote, backward, and primitive, but this region has played a central role in the history of the surrounding states and the wider East and Southeast Asia region. Far from isolated, the Central Highlands engaged in trade in precious forest products with lowland states and beyond since at least the emergence of the Hinduized Cham states from the first centuries ce onward. Lowland and coastal states needed the support of local leaders and traders in order to boost their trade and tax revenues. In addition, as a buffer between various rivalrous polities now known as Vietnam, Champa, Cambodia, Laos, and Thailand, the area occupied a strategic position in the wider mainland Southeast Asia region. With the emergence of a unified, neo-Confucianist Vietnamese state the region lost its centrality until the late colonial era, when its strategic value turned it into a battleground among various Vietnamese parties, France, and the United States. It was here that the outcome of the Indochina wars was determined, but at a terrible price for the local population. After the adoption of economic reforms in reunified Vietnam the Central highlands regained its economic centrality, predicated on the global prominence of its valuable cash crops such as coffee, tea, rubber, pepper, and cashew. This coffee boom was based on the labor of lowlander in-migrants, who displaced and dispossessed the highlanders in the process, turning the national and international integration of the Central Highlands and its renewed centrality into a tragic experience for the Central Highlanders. By taking the centrality of the Central Highlands seriously, I arrive at an alternative historical periodization.

scholarly journals Manuscript of Е. D. Prokofieva “Fishing of the Taz-Turukhansk Selkups” from the Archive of the Museum of Anthropology and Ethnography (Kunstkamera) of the Russian Academy of Sciences as a Source on the History and Ethnography of Siberia: 1920s–60s

2021 ◽  
pp. 168-180
Author(s):  
Olga B. Stepanova ◽  
Keyword(s):  
Southeast Asia ◽  
Graduate Student ◽  
Traditional Culture ◽  
Valuable Source ◽  
Russian Academy Of Sciences ◽  
East And Southeast Asia ◽  
History Of ◽  
Ethnographic Data ◽  
Academy Of Sciences ◽  
Traditional Fishing

In the archive of the Museum of Anthropology and Ethnography (Kunstkamera) of the Russian Academy of Sciences, in the collection of famous ethnographers and researchers of Siberia, employees of the MAE RAS G.N. Prokofiev and E.D. Prokofieva there is an incomplete manuscript of an article by Ekaterina Dmitrievna Prokofieva “Fishing in the Taz-Turukhansk Selkups” (AMAE, fond 6, series 1, no. 104). In the first part of the manuscript, the author provides purely ethnographic data on traditional fishing methods among the population of the Taz River, characterizing the state of fishing in the region on the eve of Soviet modernization. The second part contains information about socialist changes that had taken place in the Taza region from the 1920s to the early 1960s: the transformation of the traditional culture of the local peoples, the change in the anthropogenic landscape, and the formation of the industrial fishing. The material, on which the work is based, was collected by E.D. Prokofieva during the expedition of 1962 to the Krasnoselkup district of the Tyumen region. The expedition was her last trip to the Northern Selkups. Alongside E.D. Prokofieva in the expedition there worked a young graduate student A.M. Reshetov, in future, well-known sinologist, historian of Russian ethnography, head of the department of East and Southeast Asia, and party organizer of the MAE RAS. The materials included in the text of the manuscript were obtained from direct participants and witnesses of the events or were taken from the economic documentation available at that time in the organizations of the district. The generation of informants has since changed, and the complex of documentation with which the researcher worked has become fragmented, scattered in the archives, and partially lost. This makes the manuscript a valuable source containing rare materials on unexplored issues of ethnography and history of the Taz lands of the era of intensive Soviet transformations. The purpose of this and several previous publications by the author, written on the basis of E.D. Prokofieva’s manuscript , is to introduce into the scientific use new data on the history, ethnography, and historiography of Siberia.

scholarly journals Urgent Need for Field Surveys of Coronaviruses in Southeast Asia to Understand the SARS-CoV-2 Phylogeny and Risk Assessment for the Future Outbreaks

2020 ◽  
Author(s):  
Murat Seyran ◽  
Sk Sarif Hassan ◽  
Vladimir N. Uversky ◽  
Pabitra Pal Choudhury ◽  
Bruce D. Uhal ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Evolutionary History ◽  
Statistical Approach ◽  
Intermediate Hosts ◽  
Field Surveys ◽  
Standard Quality ◽  
History Of ◽  
Related Group ◽  
Sampling Problems

Phylogeny is a statistical approach displaying the evolutionary history of a genetically related group of organisms with the fundamental prerequisite of the utilization of a significant sample size that could represent the whole population under investigation. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) phylogeny analyses are based on a single isolate of BatCoVs, which is not a sufficient representation of genetically related CoVs. For instance, the unique Bat-CoV RaTG13 sequence that is genetically associated with SARS-CoV-2 was isolated from Yunnan, China, in 2013. To date, no other RaTG13 sequence has been obtained in a different time (temporal), place (spatial), or other host condition. Data scarcity of Bat-CoVs sequences raises concern on the several fundamental experimental and biostatistical aspects, e.g. repeatability of the sequences and intraspecies variation of critical genes, such as the receptor-binding domain of Spike protein. Sunda pangolin has been proposed as the intermediate host and source of SARS-CoV-2, but no Pangolin-CoV isolates have been isolated in Southeast Asia, where Sunda pangolins inhabit. Most Pangolin-CoVs were isolated from deceased pangolins, that were captured during illegal animal trafficking into China, hence raising questions about the reliability and quality of such isolates. Pangolin-CoV sampling problems are also evident in the deposited sequences that are of sub-standard quality. Therefore, there is urgent need for survey the Bat-CoVs and possible intermediate hosts, such as pangolins and civets in Southeast Asia. These surveys are required to investigate the genomic source of SARS-CoV-2 and assess possible future risks for new outbreaks. The current SARS-CoV-2 phylogeny with unacceptably limited numbers of Bat-CoVs and Pangolin-CoVs sequences not sufficient and technically not appropriate for reliable phylogenic analysis.

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