scholarly journals Population genomics of Mesolithic Scandinavia: Investigating early postglacial migration routes and high-latitude adaptation

PLoS Biology ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. e2003703 ◽  
Author(s):  
Torsten Günther ◽  
Helena Malmström ◽  
Emma M. Svensson ◽  
Ayça Omrak ◽  
Federico Sánchez-Quinto ◽  
...  
Keyword(s):  
High Latitude ◽  
Population Genomics ◽  
Migration Routes ◽  
Postglacial Migration

scholarly journals Genomics of Mesolithic Scandinavia reveal colonization routes and high-latitude adaptation

2017 ◽  
Author(s):  
Torsten Günther ◽  
Helena Malmström ◽  
Emma M. Svensson ◽  
Ayça Omrak ◽  
Federico Sánchez-Quinto ◽  
...  
Keyword(s):  
North Atlantic ◽  
High Latitude ◽  
Atlantic Coast ◽  
Stone Tool ◽  
Strong Continuity ◽  
Migration Routes ◽  
Hunter Gatherers ◽  
High Frequencies ◽  
Last Glaciation ◽  
East West

AbstractScandinavia was one of the last geographic areas in Europe to become habitable for humans after the last glaciation. However, the origin(s) of the first colonizers and their migration routes remain unclear. We sequenced the genomes, up to 57x coverage, of seven hunter-gatherers excavated across Scandinavia and dated to 9,500-6,000 years before present. Surprisingly, among the Scandinavian Mesolithic individuals, the genetic data display an east-west genetic gradient that opposes the pattern seen in other parts of Mesolithic Europe. This result suggests that Scandinavia was initially colonized following two different routes: one from the south, the other from the northeast. The latter followed the ice-free Norwegian north Atlantic coast, along which novel and advanced pressure-blade stone-tool techniques may have spread. These two groups met and mixed in Scandinavia, creating a genetically diverse population, which shows patterns of genetic adaptation to high latitude environments. These adaptations include high frequencies of low pigmentation variants and a gene-region associated with physical performance, which shows strong continuity into modern-day northern Europeans.

Genetic variation patterns of American chestnut populations at EST-SSRs

Botany ◽  
2017 ◽  
Vol 95 (8) ◽  
pp. 799-807 ◽  
Author(s):  
Oliver Gailing ◽  
C. Dana Nelson
Keyword(s):  
Genetic Variation ◽  
Expressed Sequence Tag ◽  
Allelic Diversity ◽  
American Chestnut ◽  
Clinal Variation ◽  
Migration Routes ◽  
Long Distance ◽  
Chloroplast Haplotype ◽  
Postglacial Migration ◽  
Chloroplast Dna Markers

The objective of this study is to analyze patterns of genetic variation at genic expressed sequence tag – simple sequence repeats (EST-SSRs) and at chloroplast DNA markers in populations of American chestnut (Castanea dentata Borkh.) to assist in conservation and breeding efforts. Allelic diversity at EST-SSRs decreased significantly from southwest to northeast along the Appalachian range, suggesting repeated founder events during postglacial migration. Comparatively high allelic diversity in Ontario, northwest of the Appalachian range, suggested more recent long-distance dispersal. Clinal variation of allele frequencies along the Appalachian axis was also in accordance with postglacial colonization from one refugium southwest of the Appalachian range. We observed clustering of the northwestern population from Ontario with southwestern populations and sharing of a rare chloroplast haplotype among western populations across the whole latitudinal range. This pattern is consistent with a divergence of postglacial migration routes and higher levels of more recent potentially human-mediated gene exchange between populations west of the Appalachian range. Population pairs east and west of the Appalachian axis showed pronounced allele frequency differences over a small geographic range. These patterns of genetic variation should be considered when sampling reproductive material for conservation and breeding.

scholarly journals Refugia and postglacial migration routes within the territory of Ukraine

2014 ◽  
pp. 134-140
Author(s):  
Lilia Iurkiv
Keyword(s):  
Key Words ◽  
Migration Routes ◽  
Broad Leaved Forest ◽  
Broad Leaf ◽  
Postglacial Migration ◽  
Forest Use ◽  
Leaf Species ◽  
Leaved Forest

The paper considers questions about distribution and survival refugia of broad leaved forest. Use provisions of traditional (historical, biogeographical, paleobotanical, paleopedological, palynological) and modern approaches (phylogeography) to research were substantiated. Emphasizes the existence of secondary refugia in the territory of Ukraine. The tendency of the changing dominant ideas about refugia distribution broad leaf species was determined. Key words: refugia (primary, secondary), postglacial migration, phylogeography.

Using chloroplast DNA to trace postglacial migration routes of oaks into Britain

1995 ◽  
Vol 4 (6) ◽  
pp. 731-738 ◽  
Author(s):  
C. FERRIS ◽  
R. P. OLIVER ◽  
A. J. DAVY ◽  
G. M. HEWITT
Keyword(s):  
Chloroplast Dna ◽  
Migration Routes ◽  
Postglacial Migration

The High-Latitude Ionosphere and its Effects on Radio Propagation

2002 ◽  
Author(s):  
R. D. Hunsucker ◽  
J. K. Hargreaves
Keyword(s):  
High Latitude ◽  
Radio Propagation ◽  
High Latitude Ionosphere

A High-Latitude Carbonate Beach in Midcoastal Maine

2002 ◽  
Author(s):  
Kevin Knuuti ◽  
Karen Knuuti
Keyword(s):  
High Latitude
Sign in / Sign up

Export Citation Format

Share Document