Sentences with phrase «gene flow»

Indeed, even just a low level of gene flow between populations can counter opposing forces of mutation, genetic drift, and selection.

Still, the problem of limited gene flow in a small population remained.

They illustrate the important role of gene flow among populations and its potential consequences.

And plants are very well suited for studies on gene flow because individuals are stationary yet pollen and seeds are mobile.

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 similarity between the two species, however, implies minimal divergence time, so gene flow between North American and European populations would have been possible at some point shortly before that date.

The ability to see where larvae is potentially going is important for understanding gene flows — movement from one population to another — in these vent species.

It's not yet clear whether the two episodes of gene flow happened at low levels over a long time or in discrete pulses.

So how much gene flow is there between plant populations?

The study also suggests that leaving forests untouched is an even better way to maintain gene flow.

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

Because of this, the team expected to find evidence of localized gene flow among individuals collected at specific geographic locations.

Their analytical model can also be applied to dogs and horses — indeed, to any species that show structured breeding in their populations instead of random gene flow.

Turns out viruses do that all the time, as do plants and insects and even us — it's called gene flow.

Yet there is evidence of high gene flow among vents.

Now, a comprehensive study of canola fields reports that pollen can travel considerable distances, but that the amount of gene flow is minimal.

Genetic evidence indicates that the light pigmentation variant at SLC24A5 was introduced into East Africa by gene flow from non-Africans.

«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.

«Environmental factors help limit gene flow between different giraffe species.»

New traits are introduced into populations by gene flow from other populations or by mutation.

The current caste system has resulted in limited gene flow for thousands of years, says Patterson.

They analyzed the drone images to identify how landscape features mediate gene flow and plant dispersal in these patchy habitats.

Over the past decade, expert panels assembled by the National Research Council have examined possible risks to human health and the environment, such as gene flow between organisms.

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.

«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.»

However, in the KhoeSan populations it appears in a much higher frequency than recent European admixture alone would suggest, indicating that it has either been positively selected in this population, actually arose in this population, or entered the population through gene flow thousands of years ago.

Deeply divergent archaic mitochondrial genome provides lower time boundary for African gene flow into Neandertals.

«Almost all of us agree there was some back - to - Africa gene flow, and it was a pretty big migration into East Africa,» says Skoglund.

As a result, native trees support pollinators that are crucial during the coffee bloom and are able to maintain reproduction and gene flow processes for plants across shade coffee systems (Jha and Dick 2010).

These suggest a complex history that may represent early gene flow across Eurasia or an early population structure that eventually led to Europeans and Asians.

With these new results in hand, researchers should have a better handle on gene flow when canola is modified in other ways, says herbicide physiologist Linda Hall of the University of Alberta, Edmonton.

«This suggests that an increase in Sub-Saharan African gene flow into Egypt occurred within the last 1,500 years,» explains Stephan Schiffels, group leader at the Max Planck Institute for the Science of Human History in Jena.

Subsequent gene flow resulted in some Native Americans sharing ancestry with present - day East Asians (including Siberians) and, more distantly, Australo - Melanesians.

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.

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

«Speciation under gene flow is rare.

The selected student will work with graduate student Adriana Hernandez to develop a phylogeny for Calochortus and to investigate gene flow and diversification in floral form among various species native to California and Mexico.

These findings come on the heels of other genome analyses — such as between coyotes, dogs, and wolves — showing such gene flow between species.

The doc - umented gene flow with Neanderthals indicates they were related enough not to reject, at either the molecular or organismal scale, mating with H. sapien.

Our distinct status as species, yet demonstrated gene flow with H. neanderthalis isn't evidence.

The DEIS acknowledges that gene flow contamination will likely occur and goes on to elaborate on the conditions which increase that possibility: proximity of fields, pest management strategies, feral alfalfa corridors, movement of honey bees and overstocking of pollinators.

Pollen viability is an important parameter that may affect gene flow frequencies at longer distances.