| 释义 |
DictionarySeeselectionselection coefficient
selection coefficient[si′lek·shən ‚kō·i‚fish·ənt] (genetics) A measure of the rate of transmission through successive generations of a given allele compared to the rate of transmission of another (usually the wild-type) allele. selection coefficient
se·lec·tion co·ef·fi·cient (s), the proportion of progeny or potential progeny not surviving to sexual maturity; usually defined artificially by expressing the fitness of a phenotype as a fraction of the mean or optimal fitness to give the relative fitness, and subtracting this fraction from unity. If the mean size of family in the population is 3.2 and that for a particular genotype is 2.4 then the fitness of the phenotype is 2.4/3.2 = 0.75 and the selection coefficient = 1 - 0.75 = .25.se·lec·tion co·ef·fi·cient (s) (sĕ-lek'shŭn kō'ĕ-fish'ĕnt) The proportion of progeny or potential progeny not surviving to sexual maturity; usually defined artificially by expressing the fitness of a phenotype as a fraction of the mean or optimal fitness to give the relative fitness, and subtracting this fraction from unity.If the mean size of family in the population is3.2 and that for a particular genotype is 2.4,then the fitness of the phenotype is 2.4/3.2 =0.75, and the selection coefficient =1- 0.75 =.25 = 5. selection coefficient see SELECTION PRESSURE. |