Genetic diversity of present American populations results from very complex demographic events involving different types and degrees of admixture. Through the analysis of lineage markers such as mtDNA and Y chromosome it is possible to recover the original Native American haplotypes, which remained identical since the admixture events due to the absence of recombination. However, the decrease i...

Historical records indicate that extensive cultural, commercial and technological interaction occurred between European and Asian populations. What have been the biological consequences of these contacts in terms of gene flow? We systematically estimated gene flow between Eurasian groups using genome-wide polymorphisms from 34 populations representing Europeans, East Asians, and Central/South A...

Naturally occurring admixture has now been documented in every major primate lineage, suggesting its key role in primate evolutionary history. Active primate hybrid zones can provide valuable insight into this process. Here, we investigate the history of admixture in one of the best-studied natural primate hybrid zones, between yellow baboons (Papio cynocephalus) and anubis baboons (Papio anubi...

We study the posterior contraction behavior of the latent population structure that arises in admixture models as the amount of data increases. An admixture model — alternatively known as a topic model — specifies k populations, each of which is characterized by a ∆-valued vector of frequencies for generating a set of discrete values in {0, 1, . . . , d}. The population polytope is defined as t...

As populations with multi-linear transmission (i.e., mixing of genetic material from two parents, say) evolve over generations, the genetic transmission lines constitute complicated networks. In contrast, uni-linear transmission leads to simpler network structures (trees). The genetic exchange in multi-linear transmission is further influenced by migration, incubation, mixing and so on. The tas...

Han Chinese experienced substantial population migrations and admixture in history, yet little is known about the evolutionary process of Chinese dialects. Here, we used phylogenetic approaches and admixture inference to explicitly decompose the underlying structure of the diversity of Chinese dialects, based on the total phoneme inventories of 140 dialect samples from seven traditional dialect...

This paper presents the effect of curing environment on unconfined compressive strength soil-cement samples and in finding optimum output mix ratio estimating silica fume admixture. work is based data from Cai Mep-Thi Vai inter-port road project results laboratory experiments. The show that specimens with highest were cured soil, lowered city water NaCl 2.5% then 5%. admixture equals to 1% (in ...

abstract to study the effect of nitrogen application and 2-4-d on weed density and weed architecture in winter wheat an experiment was conducted at agricultural research site, university of mohaghegh ardabili, ardabil in 2009. treatments were two nitrogen levels (no fertilizer and 150 kgnha-1 application) with or without 2-4-d (1.5 kg ai ha-1). results showed that nitrogen application had no si...

Genetic studies have identified substantial non-African admixture in the Horn of Africa (HOA). In the most recent genomic studies, this non-African ancestry has been attributed to admixture with Middle Eastern populations during the last few thousand years. However, mitochondrial and Y chromosome data are suggestive of earlier episodes of admixture. To investigate this further, we generated new...