Sentences with phrase «gene flow from»

Genetic differentiation and estimation of gene flow from F - statistics under isolation - by - distance

To investigate the gene flow from Russia into Finland and westwards to Scandinavia, the researchers included previously genotyped individuals from Norway, Sweden and Russia.

«Earlier studies have looked at the gene flow from sorghum to johnsongrass, but what also is important is to see gene flow in the opposite direction,» Rooney said.

Illegal gene flow from transgenic creeping bentgrass: the saga continues.

How important is gene flow for maintaining a species» identity and diversity, and what are the implications of these processes for evolution, conservation of endangered species, invasiveness, or unintentional gene flow from domesticated crops to wild relatives?

«We must also investigate sources of selection more critically,» Marshall said, «bearing in mind the complex interplay of human and environmental selection and the likelihood of long - term gene flow from the wild.»

We show that Neandertals shared more genetic variants with present - day humans in Eurasia than with present - day humans in sub-Saharan Africa, suggesting that gene flow from Neandertals into the ancestors of non-Africans occurred before the divergence of Eurasian groups from each other.

Not exact matches

While they don't have definite answers, besides having good genes, Kawas said, the answer is probably a combination of being resilient to Alzheimer's Disease and also that they did not develop other dementia - causing conditions, such as microscopic infarctions that occur when blood flow is blocked from certain regions of the brain and hippocampal sclerosis, which causes neuron loss.

Specifically, they have found unnaturally high levels of antibiotic resistance genes in sediments where the river comes into contact with treated municipal wastewater effluent and farm irrigation runoff as it flows 126 miles from Rocky Mountain National Park through Fort Collins and across Colorado's eastern plain, home to some of the country's most densely packed livestock operations.

Back when life first took hold, genes flowed around freely; genetic sequences skipped around from organism to organism in much the way they may soon on the Internet.

«It may be that gene flow was mostly unidirectional, from Neandertals into modern humans,» says Svante Pääbo, Director at the Max Planck Institute for Evolutionary Anthropology.

«Thus, both palaeo - anthropological and genetic evidence increasingly points to multiregional origins of anatomically modern humans in Africa, i.e. Homo sapiens did not originate in one place in Africa, but might have evolved from older forms in several places on the continent with gene flow between groups from different places,» says Carina Schlebusch.

Using DNA from captured mountain lions, he plans to analyse gene flow in the population.

The study illustrates the genetic foundation of evolution, including how genes can flow from one species to another, and how different versions of a gene within a species can contribute to the formation of entirely new species, the researchers report in the journal Nature.

In the study, researchers from Mayo Clinic in Rochester, Minn., demonstrated that reducing blood flow activated the heme oxygenase genes.

In the early stages of plant regeneration, plants benefit from the interaction with animals: bees pollinate flowers and maintain gene flow among plant populations, while birds disperse seeds that can establish as seedlings at new locations.

Most scientists agree now that gene flow will occur — genes will go from engineered crops to nearby relatives.

The researchers came up with a computational method that allows biological information to literally flow from gene to gene across a massive network across many genomes, known as the «supergenomic» network.

Co-author Christina Hvilsom, a researcher at Copenhagen Zoo, said, «We have learned from the comparable studies of modern humans and Neanderthals that gene flow occasionally has an impact on parts of the genomes that provide some advantages for the admixed individuals.

Indeed, one of the amazing things that parentage studies revealed is just how far genes could flow — from hundreds to thousands of meters in some cases.

«Our findings were quite surprising because females typically just select sperm from males of their own species during fertilization, an action that does not lead to long - term consequences because there is no gene flow between the species,» said Asher Cutter, associate professor of ecology and evolutionary biology at the University of Toronto.

By comparing the frequency of markers in samples taken from known locations, they managed to assemble a map of elephant gene flow across the continent.

The team's evidence of «gene flow» from descendants of modern humans into the Neanderthal genome applies to one specific Neanderthal, whose remains were found in a cave in the Altai Mountains in southern Siberia, near the Russia - Mongolia border.

Body paint is just one of the ways different cultures, such as these highlanders from Papua New Guinea, distinguish themselves — and, perhaps, limit gene flow.

These results can be explained if gene flow occurred from Neandertals into the ancestors of non-Africans.

According to this view, archaic humans were not replaced by anatomically modern humans, but rather, gene flow between Africa, Europe, and Asia, led to the evolution of modern humans from local populations.

They report their results in «Potential paths for male - mediated gene flow to and from an isolated grizzly bear population» in the journal Ecosphere.

The researchers compared mice with a normal glymphatic system to those with a disabled gene that prevented glial cells from assisting in the fluid flow.

Asian wild rice is a hybrid swarm with extensive gene flow and feralization from domesticated rice Wang, H., F.G. Vieira, J.E. Crawford, C. Chu, R. Nielsen.

Asian wild rice is a hybrid swarm with extensive gene flow and feralization from domesticated rice.

In contrast, smaller isolated populations are genetically decoupled from the mitigating effects of gene flow can rapidly radiate.

«The two plants are genetically related and the fear is that through gene flow, johnsongrass can pick up traits from sorghum,» Bagavathiannan said.

The comparison suggests that the ancestors of Ancient Beringians and those of other Native Americans descended from a single founding population that first split from East Asians around 36,000 years ago, although gene flow with North Eurasians — possibly centered around Lake Baikal in southern Siberia — continued until about 25,000 years ago.

The team's evidence of «gene flow» from descendants of modern humans into the Neanderthal genome applies to one specific Neanderthal, whose remains were found some years ago in a cave in southwestern Siberia, in the Altai Mountains, near the Russia - Mongolia border.

We note that loci characterized by high levels of differentiation, which are likely to be resisting introgression, were included in our estimates from previous studies; therefore, if anything, the estimates of gene flow used in the simulations are likely to be underestimates, and our results should therefore be conservative.

Estimates of current and ancestral population sizes (Ne1 = 1,600,000; Ne2 = 780,000; Nancestral = 470,000), divergence time (1,800,000 years and assuming a generation time of 1 year), and gene flow (2Nm1autosomal = 1.69; 2Nm2autosomal = 0.83; 2Nm1X - chromosome = 0.38; 2Nm2X - chromosome = 0.26) were obtained from previous studies and inferred using an Isolation - with - Migration model [21], [26].

A genome - wide FST scan comparison with previous sequence data from an area in West Africa with higher infection endemicity indicates that regional gene flow prevents genetic isolation, but revealed allele frequency differentiation at three drug resistance loci and an erythrocyte invasion ligand gene.

Professor Dockrell and her group are investigating mechanisms that regulate the production of immune - related proteins, starting from gene regulation (epigenetics), gene expression (transcriptomics), cell phenotypes (flow cytometry) and finally protein release.

In comparison, gene flow between Finland and Scandinavia appeared to be restricted, and was found to be absent from the east towards Scandinavia,» he says.

It's handled well by director Gene Saks (he also made The Odd Couple), who keeps the humour flowing and maintains a lively pace until about half an hour from the end.

However, inferring dispersal capability from life history characteristics should be undertaken with caution, given that life history only partially explains the observed patterns of gene flow for other marine species [60], [61].

... According to a review by Lovich and Ennen (2013), the construction and operation of wind farms have both potential and known impacts on terrestrial vertebrates, such as: (i) increase in direct mortality due to traffic collisions; (ii) destruction and modification of the habitat, including road development, habitat fragmentation and barriers to gene flow; (iii) noise effects, visual impacts, vibration and shadow flicker effects from turbines; (iv) electromagnetic field generation; (v) macro and microclimate change; (vi) predator attraction; and (vii) increase in fire risks.

In some cases, extensive gene flow or assisted migration from populations in warmer parts of the range may enhance the genetic potential for rapid evolutionary response of poleward populations (e.g., Kuparinen et al., 2010).

There are also potential risks to biodiversity arising from gene flow and toxicity to nontarget organisms from herbicide - resistant (HT) and insect - resistant (Bt) crops.