Sentences with phrase «gene flow across»

Natural hybridization has been extensively studied in the last few years revealing the mosaic nature of gene flow across species boundaries [11].

We therefore tested for the presence or absence of gene flow across populations using admixture tests based on the D - statistic (30).

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 new finding shows that «gene flow across taxonomic boundaries happens,» observes geneticist Michael F. Hammer of the University of Arizona.

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.

Not exact matches

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.

Here's how DNA and connectivity relate: When movements and mating across blocks of territory are taking place smoothly, gene flow is unrestricted, and scientists don't find a difference in DNA between the members of a species or subspecies.

We call this process «speciation with gene flow,» and evolutionary biologists have long wondered if the genetic basis for this process is highly repeatable and if the genes involved are spread out across the whole genome or in a few discrete regions.»

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.

A more recent study using individuals sampled across the hybrid zone and 22 markers showed that some loci are characterized by concordant and stepped clines that do not co-localize with any obvious physical or ecological barriers [27], suggesting an overall barrier to gene flow likely to be primarily maintained by selection against intrinsically unfit hybrids.

Nonetheless, given high levels of gene flow (2Nm > 1) and persistence of ancestral variation, fixed differences between the subspecies are expected to be very rare across the genome.

Figure S1 shows QRT - PCR data for expression of the TGF - beta superfamily member GDF3, a gene which is strongly downregulated across the various subpopulations, for four ES cell lines subjected to separation by flow cytometry.