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 ?
Knowing exactly where the bottleneck was going to occur allowed us to increase capacity at the critical time period," says Mr Harvill.
It is architected to remove all the bottlenecks to data flow so that the only remaining limit is the disk speed--a "data flow" architecture where data moves at "streaming" speeds.
Prevent more than 449,500 crashes, including 1,750 fatalities and 220,500 injuries * Cut pollution at the bottlenecks in half, reducing smog-causing volatile organic compounds by nearly 50 percent and carbon monoxide by 54 percent * Slash emissions of carbon dioxide, a greenhouse gas, by an impressive 77 percent at those sites * Conserve more than 40 billion gallons of fuel * Reduce rush hour delays by an average of 16 minutes per trip - saving more than 30 minutes per day for commuters who must negotiate a bottleneck in both morning and evening rush hours.
Completing improvements to all four bottlenecks would result in individual savings for commuters using the bottlenecks of up to $1,353 per year, according to the report.
The AMD Dual-Core Opteron processors are the next evolution of AMD64's Direct Connect Architecture and were designed to directly connect two cores on a single die, along with memory, I/O and dedicated caches, improving overall system performance and efficiency and helping to eliminate the bottlenecks inherent in a front-side-bus architecture.
In addition to troubleshooting specific events, TrueView Web Diagnostics also helps IT continually monitor and proactively improve the end-user experience by finding the bottlenecks in the Web application infrastructure, such as Web pages or servers that exhibit consistently poor performance.
Of the 203 respondents that viewed IT as a growth inhibitor, more than half felt that the lack of information or transaction capabilities were causes for the bottlenecks to growth, while only 30 percent of the respondents said lack of infrastructure was a key underlying issue.
LANexpress makes remote LAN access easy, and optimizes end-to-end performance by eliminating many of the bottlenecks to continuous dial-in and dial-out communications.
By pinpointing the bottlenecks in a design, then automating the path to more efficient silicon, system level design tools like those from Poseidon can help our users optimize their designs to achieve the best performance/area tradeoffs.