
handle: 10261/162209
[ES] En planteamientos experimentales, con apareamientos al azar en poblaciones de tamaño limitado, es usual calcular el coeficiente de consanguinidad medio de las progenies por el método del tamaño efectivo de la población. La imposición de determinadas restricciones en los apareamientos, la intercalación de generaciones de autofecundación, etc., producen variaciones que pueden alterar sensíblemente el valor de ese coeficiente. La computación, por el método de Cruden, del coeficiente de consanguinidad de la progenie de todos los apareamientos posibles y compatibles con el planeamiento experimental permite el cálculo del coeficiente de consanguinidad medio y de la varianza de la poblacíón de coeficientes. Por este método se han computado fórmulas para tres planeamientos experimentales: apareamientos totalmente al azar, selección recurrente en especies autofecundables y mantenimiento de líneas masculinas. En los últimos planeamientos se calculan las diferencias en los coeficientes de consanguinidad computados por uno u otro método.
[EN] Computing inbreeding in closed populations under several selection systems. The computation of inbreeding coefficients in small populations under random mating is usually made following the method of the effective population size. There are circumstances, e. g. restrictions for certain kinds of matings, one or more generations of selfing between generations of random mating, etc., that may alter considerably the coefficient calculated by that method. Computing by Cruden’s method the inbreeding coefficient of the progeny resulting from all possible matings allows to obtain the mean inbreeding coefficient and the variance of the population of coefficients. Formulas are presented for three different kinds of experimental plans: 1st, unrestricted random mating; 2nd, recurrent selection in species that can be selfed, and 3rd, maintenance of male strains. The differences between the coefficients calculated by both methods are given for the last two plans.
16 páginas, 6 tablas y 1 figura.
Peer reviewed
Consanguinidad, Ganado porcino, Poblaciones cerradas
Consanguinidad, Ganado porcino, Poblaciones cerradas
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