Phylogeography, postglacial gene flow, and population history of North American Northern Goshawks (Accipiter gentilis)

Abstract Pleistocene climate fluctuations have shaped the patterns of genetic diversity observed in extant species. Although the effects of recent glacial cycles on genetic diversity have been well studied on species in Europe and North America, genetic legacy of species in the Pleistocene in north and northwest of China where glaciations was not synchronous with the ice sheet development in the Northern Hemisphere or or had little or no ice cover during the glaciations’ period, remains poorly understood. Here we used phylogeographic methods to investigate the genetic structure and population history of the chukar partridge Alec-toris chukar in north and northwest China. A 1,152 – 1,154 bp portion of the mtDNA CR were sequenced for all 279 specimens and a total number of 91 haplotypes were defined by 113 variable sites. High levels of gene flow were found and gene flow estimates were greater than 1 for most population pairs in our study. The AMOVA analysis showed that 81% and 16% of the total genetic variability was found within populations and among populations within groups, respectively. The demographic history of chukar was examined using neutrality tests and mismatch distribution analyses and results indicated Late Pleistocene population expansion. Results revealed that most populations of chukar experienced population expansion during 0.027 ? 0.06 Ma. These results are at odds with the results found in Europe and North America, where population expansions occurred after Last Glacial Maximum (LGM, 0.023 to 0.018 Ma). Our results are not consistent with the results from avian species of Tibetan Plateau, either, where species experienced population expansion following the retreat of the extensive glaciation period (0.5 to 0.175 Ma).

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Denisovan ancestry and population history of early East Asians

10.1101/2020.06.03.131995 ◽

2020 ◽

Cited By ~ 1

Author(s):

Diyendo Massilani ◽

Laurits Skov ◽

Mateja Hajdinjak ◽

Byambaa Gunchinsuren ◽

Damdinsuren Tseveendorj ◽

...

Keyword(s):

Gene Flow ◽

Human Population ◽

Modern Human ◽

Population History ◽

East Asians ◽

Aboriginal Australians ◽

North East ◽

History Of ◽

Female Member ◽

Admixture Event

AbstractWe present analyses of the genome of a ~34,000-year-old hominin skull cap discovered in the Salkhit Valley in North East Mongolia. We show that this individual was a female member of a modern human population that, following the split between East and West Eurasians, experienced substantial gene flow from West Eurasians. Both she and a 40,000-year-old individual from Tianyuan outside Beijing carried genomic segments of Denisovan ancestry. These segments derive from the same Denisovan admixture event(s) that contributed to present-day mainland Asians but are distinct from the Denisovan DNA segments in present-day Papuans and Aboriginal Australians.

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Gene flow from multiple sources maintains high genetic diversity and stable population history of Common MoorhenGallinula chloropusin China

Ibis ◽

10.1111/ibi.12579 ◽

2018 ◽

Vol 160 (4) ◽

pp. 855-869 ◽

Cited By ~ 4

Author(s):

Luzhang Ruan ◽

Wei Xu ◽

Yuqing Han ◽

Chaoying Zhu ◽

Bicai Guan ◽

...

Keyword(s):

Genetic Diversity ◽

Gene Flow ◽

Population History ◽

Stable Population ◽

Multiple Sources ◽

High Genetic Diversity ◽

History Of

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Denisovan ancestry and population history of early East Asians

Science ◽

10.1126/science.abc1166 ◽

2020 ◽

Vol 370 (6516) ◽

pp. 579-583

Author(s):

Diyendo Massilani ◽

Laurits Skov ◽

Mateja Hajdinjak ◽

Byambaa Gunchinsuren ◽

Damdinsuren Tseveendorj ◽

...

Keyword(s):

Gene Flow ◽

Human Population ◽

Modern Human ◽

Population History ◽

East Asians ◽

Aboriginal Australians ◽

History Of ◽

East And West ◽

Female Member ◽

Admixture Event

We present analyses of the genome of a ~34,000-year-old hominin skull cap discovered in the Salkhit Valley in northeastern Mongolia. We show that this individual was a female member of a modern human population that, following the split between East and West Eurasians, experienced substantial gene flow from West Eurasians. Both she and a 40,000-year-old individual from Tianyuan outside Beijing carried genomic segments of Denisovan ancestry. These segments derive from the same Denisovan admixture event(s) that contributed to present-day mainland Asians but are distinct from the Denisovan DNA segments in present-day Papuans and Aboriginal Australians.

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: The First Immigrants from Asia: A Population History of the North American Indians . A. J. Jaffe.

American Anthropologist ◽

10.1525/aa.1994.96.4.02a00660 ◽

1994 ◽

Vol 96 (4) ◽

pp. 1027-1028

Author(s):

Fekri A. Hassan

Keyword(s):

American Indians ◽

North American ◽

Population History ◽

North American Indians ◽

The North ◽

History Of

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Population history of Berthelot's pipit: colonization, gene flow and morphological divergence in Macaronesia

Molecular Ecology ◽

10.1111/j.1365-294x.2007.03543.x ◽

2007 ◽

Vol 16 (21) ◽

pp. 4599-4612 ◽

Cited By ~ 41

Author(s):

JUAN CARLOS ILLERA ◽

BRENT C. EMERSON ◽

DAVID S. RICHARDSON

Keyword(s):

Gene Flow ◽

Population History ◽

Morphological Divergence ◽

History Of

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Genetic structure and sex-biased gene flow in the history of southern African populations

10.1101/237297 ◽

2017 ◽

Cited By ~ 1

Author(s):

Vladimir Bajić ◽

Chiara Barbieri ◽

Alexander Hübner ◽

Tom Güldemann ◽

Christfried Naumann ◽

...

Keyword(s):

Gene Flow ◽

Y Chromosome ◽

Southern Africa ◽

Social Dynamics ◽

Population History ◽

Eastern Africa ◽

The Social ◽

African Populations ◽

History Of ◽

Over Time

ABSTRACTObjectivesWe investigated the genetic history of southern African populations with a special focus on their paternal history. We reexamined previous claims that the Y-chromosome haplogroup E1b1b was brought to southern Africa by pastoralists from eastern Africa, and investigated patterns of sex-biased gene flow in southern Africa.Material and MethodsWe analyzed previously published complete mtDNA genome sequences and ~900 kb of NRY sequences from 23 populations from Namibia, Botswana and Zambia, as well as haplogroup frequencies from a large sample of southern African populations and 23 newly genotyped Y-linked STR loci for samples assigned to haplogroup E1b1b.ResultsOur results support an eastern African origin for Y-chromosome haplogroup E1b1b; however, its current distribution in southern Africa is not strongly associated with pastoralism, suggesting a more complex origin for pastoralism in this region. We confirm that the Bantu expansion had a notable genetic impact in southern Africa, and that in this region it was probably a rapid, male-dominated expansion. Furthermore, we find a significant increase in the intensity of sex-biased gene flow from north to south, which may reflect changes in the social dynamics between Khoisan and Bantu groups over time.ConclusionsOur study shows that the population history of southern Africa has been very complex, with different immigrating groups mixing to different degrees with the autochthonous populations. The Bantu expansion led to heavily sex-biased admixture as a result of interactions between Khoisan females and Bantu males, with a geographic gradient which may reflect changes in the social dynamics between Khoisan and Bantu groups over time.

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Introgression makes waves in inferred histories of effective population size

10.1101/121483 ◽

2017 ◽

Author(s):

John Hawks

Keyword(s):

Gene Flow ◽

Population Size ◽

Effective Population Size ◽

Population History ◽

Human Populations ◽

Effective Population ◽

History Of ◽

Or Gene ◽

Time Of Origin ◽

Past Population

AbstractHuman populations have a complex history of introgression and of changing population size. Human genetic variation has been affected by both these processes, so that inference of past population size depends upon the pattern of gene flow and introgression among past populations. One remarkable aspect of human population history as inferred from genetics is a consistent “wave” of larger effective population size, prior to the bottlenecks and expansions of the last 100,000 years. Here I carry out a series of simulations to investigate how introgression and gene flow from genetically divergent ancestral populations affect the inference of ancestral effective population size. Both introgression and gene flow from an extinct, genetically divergent population consistently produce a wave in the history of inferred effective population size. The time and amplitude of the wave reflect the time of origin of the genetically divergent ancestral populations and the strength of introgression or gene flow. These results demonstrate that even small fractions of introgression or gene flow from ancient populations may have large effects on the inference of effective population size.

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