Inbreeding Effective Size
Alternatively, the effective population size may be defined by noting how the average inbreeding coefficient changes from one generation to the next, and then defining Ne as the size of the idealized population that has the same change in average inbreeding coefficient as the population under consideration. The presentation follows Kempthorne (1957).
For the idealized population, the inbreeding coefficients follow the recurrence equation
Using Panmictic Index (1 − F) instead of inbreeding coefficient, we get the approximate recurrence equation
The difference per generation is
The inbreeding effective size can be found by solving
This is
although researchers rarely use this equation directly.
Read more about this topic: Effective Population Size
Famous quotes containing the words inbreeding, effective and/or size:
“Be reflective ... and stay away from the theater as much as you can. Stay out of the theatrical world, out of its petty interests, its inbreeding tendencies, its stifling atmosphere, its corroding influence. Once become “theatricalized,” and you are lost, my friend; you are lost.”
—Minnie Maddern Fiske (1865–1932)
“Knowledge about life is one thing; effective occupation of a place in life, with its dynamic currents passing through your being, is another.”
—William James (1842–1910)
“One writes of scars healed, a loose parallel to the pathology of the skin, but there is no such thing in the life of an individual. There are open wounds, shrunk sometimes to the size of a pin-prick but wounds still. The marks of suffering are more comparable to the loss of a finger, or the sight of an eye. We may not miss them, either, for one minute in a year, but if we should there is nothing to be done about it.”
—F. Scott Fitzgerald (1896–1940)