Forest Genetic Resources
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genetic
drift
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Index
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alphabetical
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Reference Definition:
Random change in allele frequencies in a population from one generation to the next because of small population size.
Source:
Schmidt, L. 1997 Tree Improvement Glossary. Danida
Other definitions:
genetic drift
Change in allele frequency from one generation to another within a population, due to the sampling of finite numbers of genes that is inevitable in all finite-sized populations. The smaller the population, the greater the genetic drift, with the result that some alleles are lost, and genetic diversity is reduced. Thus minimization of genetic drift is an important consideration for conservation of genetic resources.
Source:
Zaid, A. et al. 1999. Glossary of biotechnology and genetic engineering. FAO Research and Technology Paper No. 7. ISBN 92-5-104369-8 http://www.fao.org/DOCREP/003/X3910E/X3910E00.htm
genetic drift
The random change of the occurance of a particular gene in a population; genetic drift is thought to be one cause of speciation when a group of organisms is separated from its parent population.
Source:
Schlindwein, B. Hypermedia Glossary of Genetic Terms. http://www.weihenstephan.de/~schlind/
ramdom genetic drift
Changes in allelic frequency due to sampling error. Changes in allele frequency that result because the genes appearing in progenies are not a perfectly representative sampling of the parental genes. (eg. in small populations). See also founder effect.
Source:
Schlindwein, B. Hypermedia Glossary of Genetic Terms. http://www.weihenstephan.de/~schlind/.
- adaptability
- adaptation
- agricultural biodiversity
- alien species
- allele
- biological diversity
- biotechnology
- clone/cloning
- conservation
- domestication
- evolution/evolutionary processes
- exotic species
- ex situ conservation
- forest biological diversity
- (forest tree) population
- forest tree species
- gene flow
- genome
- gene pool
- genetic conservation
- genetic diversity
- genetic drift
- genetic engineering
- genetic markers
- genetic pollution
- genetic resources
- genetic variation
- genotype
- germplasm
- hybrid
- hybridization
- indicator species
- in situ conservation
- introduced species
- introgression
- invasive alien species
- invasive species
- keystone species
- land race
- macropropagation
- management of genetic resources
- mating system
- micropropagation
- native species
- naturalized species
- outcrossing
- phenotype
- plus tree
- pollination
- progeny
- provenance
- (quantitative/adaptative) trait
- reproductive material
- reproductive process
- selection
- species
- tree breeding
- tree improvement
- value of genetic resources
- variability
- vegetative propagation
- weed/weediness