selection pressure

(redirected from selection pressures)
Also found in: Medical.

selection pressure

[si′lek·shən ‚presh·ər]
(evolution)
Those factors that influence the direction of natural selection.
References in periodicals archive ?
Such behavioural tendencies would have been favoured by selection pressures to avoid false-negative responses when scanning the environment for imminent infectious threats," they concluded.
Dr Kaminski says, "Domestic dogs have a unique history--they have lived alongside humans for 30,000 years and during that time selection pressures seem to have acted on dogs' ability to communicate with us.
Objective: In social animals, The characteristics and dynamics of groups affect the development of individuals, The selection pressures operating on them and the demography of populations.
During that time, selection pressures seem to have acted on dogs' ability to communicate with us," she added.
They discuss general principles of evolution and ecology as they apply to cancer, the molecular mechanisms that underlie genetic heterogeneity within tumors, roles of the microenvironment and spatial heterogeneity within tumors that provide selection pressures and drive the coevolution of cancer cells with their microenvironment, and examples of how to incorporate novel technologies such as liquid biopsy into clinical practice to detect and monitor tumors during treatment.
The higher 0157 resistance frequencies in Michigan than nationwide indicate that selection pressures vary by location and source.
We tend to think there were wild animals and then there were domestic animals rather than thinking about the selection pressures on domestic plants and animals that varied through time," she said.
Even if we ignore new technologies, moving off the earth, and various selection pressures, evolution still has surprises just by chance mutation.
Thus, the males may have larger brain size as a result of the divergent selection pressures hypothesis.
Gene amplifications are under continuous selection pressures, Snijders and Mao described that and "when the selection pressure is removed, amplifications are not maintained and eventually disappear.
He was the one of the first scientists to suggest that there may be a relatively low limit to the number of traits (or loci in plants governed by such mechanisms as genetic changes) that can be under selection pressures to change before that overall plant population suffers a population collapse sufficiently severe as to threaten the plant's extinction.
thaliana accessions subjected to different historical selection pressures for freezing tolerance (Zhen and Ungerer, 2008b).