General Selection Model

EQUATION

The General Selection Model is encapsulated by the equation:

}{\overline{W}}

:where:

::

p

is the frequency of the dominant gene
::

q

is the frequency of the recessive gene
::

\Delta q

is the rate of evolutionary change of the frequency of the recessive gene
::

W_0,W_1, W_2

are the Relative Fitnessess of homozygous dominant, heterozygous, and homozygous recessive genotypes respectively.
::

\overline{W}

is the mean population relative fitness.

In words:

The product of the relative frequencies,

pq

, is a measure of the genetic variance. The quantity pq is maximized when there is an equal frequency of each gene, when

p=q

. In the GSM, the rate of change

\Delta Q

is proportional to the genetic variation.

The mean population fitness

\overline{W}

is a measure of the overall fitness of the population. In the GSM, the rate of change

\Delta Q

is inversely proportional to the mean fitness

\overline{W}

-- i.e. when the population is maximally fit, no further change can occur.

The remainder of the equation,

\big + p(W_1 - W_0)\big

, refers to the mean effect of an allele substitution. In essence, this term quantifies what effect genetic changes will have on fitness.

SEE ALSO

EXTERNAL LINKS

	CATEGORIES ABOUT GENERAL SELECTION MODEL

	population genetics

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