Canal-U

Mon compte
Université Toulouse-Jean Jaurès (Toulouse II-le Mirail)

Tracing Human Ancestral Migration from its Symbiotic Bacteria / Alexia Nguyen Trung


Copier le code pour partager la vidéo :
<div style="position:relative;padding-bottom:56.25%;padding-top:10px;height:0;overflow:hidden;"><iframe src="https://www.canal-u.tv/video/universite_toulouse_ii_le_mirail/embed.1/tracing_human_ancestral_migration_from_its_symbiotic_bacteria_alexia_nguyen_trung.61511?width=100%&amp;height=100%" style="position:absolute;top:0;left:0;width:100%;height: 100%;" width="550" height="306" frameborder="0" allowfullscreen scrolling="no"></iframe></div> Si vous souhaitez partager une séquence, indiquez le début de celle-ci , et copiez le code : h m s
Contacter la chaine
J’aime
Imprimer
partager facebook twitter

Tracing Human Ancestral Migration from its Symbiotic Bacteria / Alexia Nguyen Trung

Tracing Human Ancestral Migration from its Symbiotic Bacteria / Alexia Nguyen Trung, in colloque "1st Virtual Conference for Women Archaeologists and Paleontologists. Nouveaux apports à l’étude des populations et environnements passés" organisé par le laboratoire Travaux et Recherches Archéologiques sur les Cultures, les Espaces et les Sociétés (TRACES) de l’Université Toulouse Jean Jaurès et le laboratoire Paléontologie Évolution Paléoécosystèmes (PALEVOPRIM) de l'Université de Poitiers, sous la responsabilité scientifique de Julie Bachellerie, Ana Belén Galán López (Traces), Émilie Berlioz et Margot Louail (Palevoprim). Université Toulouse Jean Jaurès, 8-9 mars 2021.
Session 2 : Occupation of territories and population mobility.
[Conférence enregistrée en distanciel].

Our understanding of the history of human migrations around the globe has greatly benefited from the development of human population genetics. It has revealed the routes of colonization and striking events of admixture of populations on the way. Many species have accompanied humans on their journey, particularly microbes closely associated to their human host. H. pylori is present in the stomach of 50% of humans. Its transmission is vertical, since it occurs particularly during childhood within the family, limiting the spread of a strain to its carrier human group. Previous work has established that its presence in Homo sapiens dates back to before the major human migrations and that H. pylori accompanied its host during the settlement process of continents, to the point that the phylogeny traces in broad lines the history of human migrations since Out Of Africa. We have developed tools to reconstruct the history of bacterial genomes and particularly Horizontal Gene Transfer, which is the ability of bacteria to acquire genetic material from other strains or species. We have shown the efficiency of these methods for retracing ancient contacts and dating the history of free-living bacteria and we use the same approach to explore the history of H. pylori. By reconstructing the history of a sample of representative H. pylori strains, we use these methods to detail the historical contacts between strains and interpret these events in terms of contacts between ancestral human populations. We focus on the complex history of European populations taking advantage of the ancient genome of H. pylori extracted from Ötzi, the iceman, which dates back to around 3000 BCA. Ötzi's H. pylori shows clear relationships with strains that are found today in Asia. During this presentation we will detail the method and discuss our results on the history of human mobilities in Europe, through the prism of symbiotic bacteria.

  •  
  •  
    Date de réalisation : 8 Mars 2021
    Durée du programme : 11 min
    Classification Dewey : Bactéries, Paléolithique, Influences du milieu sur le physique des hominidés, Biologie et écosystème humain
  •  
    Catégorie : Colloques
    Niveau : niveau Master (LMD), niveau Doctorat (LMD), Recherche
    Disciplines : Microbiologie, Evolution, Paléolithique
    Collections : 1st Conference for Women Archaeologists and Paleontologists
    ficheLom : Voir la fiche LOM
  •  
    Auteur(s) : NGUYEN TRUNG Alexia
    producteur : Université Toulouse-Jean Jaurès-campus Mirail
    Réalisateur(s) : MICHAUD Nathalie
    Editeur : SCPAM / Université Toulouse-Jean Jaurès-campus Mirail
  •  
    Langue : Français
    Mots-clés : paléoanthropologie, Helicobacter pylori, Paléolithique, migrations de peuples préhistoriques, bactéries symbiotiques
    Conditions d’utilisation / Copyright : Tous droits réservés à l'Université Jean-Jaurès et aux auteurs.
 

commentaires


Ajouter un commentaire Lire les commentaires
*Les champs suivis d’un astérisque sont obligatoires.
Aucun commentaire sur cette vidéo pour le moment (les commentaires font l’objet d’une modération)
 

Dans la même collection

 Sensivity analysis to morphological changes of the shoulder joint: application to percussion gestures during Oldowan debitage / Alicia Blasi-Toccacceli
 "Ouranopithecus macedoniensis" (late Miocene, Greece): analysis of mandibular fragments using 3D geometric morphometrics / Melania Ioannidou
 Comminution capabilities of extant and fossil anthropoids during molar intercuspation: a preliminary experiment using a chewing simulator / Axelle E. C. Walker
 New sperm whale cranium from the late Miocene and a revised family attribution for the small crown physeteroid "Thalassocetus" / Apolline Alfsen
 What is shaping the brain? A perspective on brain size evolution in carnivorans / Margot Michaud
 Postnatal shape changes in the rodent mandible at a macroevolutionary scale / Morgane Dubied
 Cranial vault healing in modern humans: input of archaeological and clinical data / Aliénor Lepetit
 A transdisciplinary approach to reconstruct the Nilotic socio-ecosystem in Luxor west bank during the Ptolemaic period (3rd-1st centuries BC.) / Giulia Nicatore
 From monoliths to megaliths: a new approach on the megalithic burials of southwestern France / Boscus Sarah
 Foragers and their symbolic landscape. Understanding the role of rock art in the territoriality of Later Stone Age Matobo populations / Léa Jobard
 Towards a tracking of past bird seasonal migrations through geological times: what could isotopes tell us? / Anaïs Duhamel
 Study of human group behaviors during the Last Glacial Maximum in the east Carpathian area from zooarchaeological remains / Laëticia Demay
 From sooty speleothems analysis to the study of occupation dynamics of caves by prehistoric societies / Ségolène Vandevelde
 An analysis of Iron Age Scottish wetland deposition practices /Tiffany Treadway
 Gender Trouble: towards a deconstruction of binarity in archaeology / Laura Mary
 “Feeling at home”: integration of Polynesian women inside pre-existing societies of Vanuatu (Melanesia) / Wanda Zinger
 Study on the origins of iron metallurgy in North-East Madagascar (11th-16th century): Reinvention or technology transfer? / Mélissa Morel
 Identification of embalming material of bird mummies through molecular and compound-specific δ13C analyses / Alex Malergue
 New insights into the study of past populations: archeozoology and cementochronology in the Middle Palaeolithic / Audrey Roussel
 Neanderthal facing climatic disruptions of the MIS 4 in southwestern France: between cynegetic choices and environmental constraints / Christelle Dancette
 Retouched bone tools: which place in Neanderthal technical systems? / Emma Bernard
 Analysis of Artefact Form: the application of morphometric methods to archaeology / Renata Pedroso de Araujo
 The middle triassic palaeoflora of monte Prà della Vacca / Kühwiesenkopf (NE Italy)-new investigations / Giuseppa Forte
 Revising the microvertebrates from the Palaeolithic site of Kalamakia (Mani Peninsula), Greece / Kolendrianou Maria
FMSH
 
Facebook Twitter
Mon Compte