bottleneck


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A marked decrease in gene pool diversity due to a low number of genetically distinct individuals in the population, i.e., a population bred from 2 individuals has far fewer variables on the allelic loci—a bottleneck—than a second population bred from hundreds of individuals

bottleneck

a period in the history of a population during which the number of individuals is reduced to a low number, perhaps by disease or extreme environmental conditions. As a result RANDOM GENETIC DRIFT may occur in the population. See also FOUNDER EFFECT.
References in periodicals archive ?
The Spanish climber Alberto Zerain, after the summit, descended safely once the rope was intact at the traverse of the Bottleneck.
Downstream processing continues to be a bottleneck for many facilities around the globe.
By having a great design, the typical bottlenecks that are caused by lack of knowledge or oversight would be eliminated.
Hughes suggests that selective pressure on one or a handful of genes might have eliminated considerable variation along the stretches of DNA that other researchers have studied and it could have given the appearance of a bottleneck.
In some cases, employees were shifted from less busy resources to the bottleneck to increase capacity during lunch hours.
It would be better to have front and back office staff members idle at times, if that is what it would take to keep the bottleneck, the physician, busy.
To ensure that this did not materially affect our results, we also evaluated size divergence of bottleneck lines in relation to true isometry.
In minutes, the VKernel capacity bottleneck Analyzer can be deployed to show a three-dimensional (CPU, memory, storage) view of where capacity bottlenecks are today and where problems are predicted to occur.
Councilman Bob Kellar, Chamber of Commerce President Doug Sink, local businessman Don Flemming and state Assemblyman George Runner are among those committed for a one-time appearance as the original sheriff of Bottleneck, who gives his life in the pursuit of justice.
He stated that a new bottleneck had developed in the lapping machines department, sequenced a few steps down the flow process.
If the double bottleneck hypothesis is correct, captive crosbreeding programs using east African and south African animals together might improve the cheetah's genetic profile and chances for survival.
Change Reflects the Company's Focus on Application Performance Bottleneck Discovery Technologies, and the Recent Strategic Relationship Formed With NEC To Deliver Application Performance Analysis Software to North American Market