9 documents found, page 1 of 1
The expansion of mtDNA haplogroup L3 within and out of Africa
Soares, P; Alshamali, F; Pereira, JB; Fernandes, V; Silva, NM; Afonso, C; Costa, MD; Musilová, E; Macaulay, V; Richards, MB; Cerny, V; Pereira, LAlthough fossil remains show that anatomically modern humans dispersed out of Africa into the Near East ∼100 to 130 ka, genetic evidence from extant populations has suggested that non-Africans descend primarily from a single successful later migration. Within the human mitochondrial DNA (mtDNA) tree, haplogroup L3 encompasses not only many sub-Saharan Africans but also all ancient non-African lineages, and its ...
The Arabian cradle: Mitochondrial relicts of the first steps along the southern...
Fernandes, V; Alshamali, F; Alves, M; Costa, MD; Pereira, JB; Silva, NM; Cherni, L; Harich, N; Cerny, V; Soares, P; Richards, MB; Pereira, LA major unanswered question regarding the dispersal of modern humans around the world concerns the geographical site of the first human steps outside of Africa. The "southern coastal route" model predicts that the early stages of the dispersal took place when people crossed the Red Sea to southern Arabia, but genetic evidence has hitherto been tenuous. We have addressed this question by analyzing the three mino...
Pleistocene-Holocene boundary in southern Arabia from the perspective of human ...
Al-Abri, A; Podgorná, E; Rose, JI; Pereira, L; Mulligan, CJ; Silva, NM; Bayoumi, R; Soares, P; Cerny, VIt is now known that several population movements have taken place at different times throughout southern Arabian prehistory. One of the principal questions under debate is if the Early Holocene peopling of southern Arabia was mainly due to input from the Levant during the Pre-Pottery Neolithic B, to the expansion of an autochthonous population, or some combination of these demographic processes. Since previous...
Human neutral genetic variation and forensic STR data
Silva, NM; Pereira, L; Poloni, ES; Currat, MThe forensic genetics field is generating extensive population data on polymorphism of short tandem repeats (STR) markers in globally distributed samples. In this study we explored and quantified the informative power of these datasets to address issues related to human evolution and diversity, by using two online resources: an allele frequency dataset representing 141 populations summing up to almost 26 thousa...
Internal diversification of mitochondrial haplogroup R0a reveals post-Last Glac...
Cerny, V; Mulligan, CJ; Fernandes, V; Silva, NM; Alshamali, F; Non, A; Harich, N; Cherni, L; El Gaaied, ABA; Al-Meeri, A; Pereira, LWidespread interest in the first successful Out of Africa dispersal of modern humans ∼60-80 thousand years ago via a southern migration route has overshadowed the study of later periods of South Arabian prehistory. In this work, we show that the post-Last Glacial Maximum period of the past 20,000 years, during which climatic conditions were becoming more hospitable, has been a significant time in the formation ...
Population history of the Red Sea–genetic exchanges between the Arabian Peninsu...
Musilová, E; Fernandes, V; Silva, NM; Soares, P; Alshamali, F; Harich, N; Cherni, L; El Gaaied, ABA; Al-Meeri, A; Pereira, L; Cerny, VArchaeological studies have revealed cultural connections between the two sides of the Red Sea dating to prehistory. The issue has still not been properly addressed, however, by archaeogenetics. We focus our attention here on the mitochondrial haplogroup HV1 that is present in both the Arabian Peninsula and East Africa. The internal variation of 38 complete mitochondrial DNA sequences (20 of them presented here...
The trans-Saharan slave trade – clues from interpolation analyses and high-reso...
Harich, N; Costa, MD; Fernandes, V; Kandil, M; Pereira, JB; Silva, NM; Pereira, LBACKGROUND: A proportion of 1/4 to 1/2 of North African female pool is made of typical sub-Saharan lineages, in higher frequencies as geographic proximity to sub-Saharan Africa increases. The Sahara was a strong geographical barrier against gene flow, at least since 5,000 years ago, when desertification affected a larger region, but the Arab trans-Saharan slave trade could have facilitate enormously this migrat...
Linking the sub-Saharan and West Eurasian gene pools: maternal and paternal her...
Pereira, L; Cerny, V; Cerezo, M; Silva, NM; Hájek, M; Vasikova, A; Kujanová, M; Brdicka, R; Salas, AThe Tuareg presently live in the Sahara and the Sahel. Their ancestors are commonly believed to be the Garamantes of the Libyan Fezzan, ever since it was suggested by authors of antiquity. Biological evidence, based on classical genetic markers, however, indicates kinship with the Beja of Eastern Sudan. Our study of mitochondrial DNA (mtDNA) sequences and Y chromosome SNPs of three different southern Tuareg gro...
Population expansion in the North Africa Late Pleistocene signalled by mitochon...
Pereira, L; Silva, NM; Franco-Duarte, R; Fernandes, V; Pereira, JB; Costa, MD; Martins, H; Soares, P; Behar, DM; Richards, MB; Macaulay, VBACKGROUND: The archaeology of North Africa remains enigmatic, with questions of population continuity versus discontinuity taking centre-stage. Debates have focused on population transitions between the bearers of the Middle Palaeolithic Aterian industry and the later Upper Palaeolithic populations of the Maghreb, as well as between the late Pleistocene and Holocene. RESULTS: Improved resolution of the mitocho...