Gain and effective population size following index selection with variable weights
1994
Run-Peng Wei | Lindgren, D. (Swedish Univ. of Agricultural Sciences, Umea (Sweden). Dept. of Forest Genetics and Plant Physiology)
The outcome of index selection from a population of families was studied. The selection criteria was a linear index that weighted family value and within-family deviation. The balance between genetic gain and effective population size was controlled by choosing a family weight. Index selection was found to be only slightly inferior to optimal selection. The difference was greater for more closely related families, for lower heritability and for more intense selection. Expected gain and effective population size were described as a function of family type, family number, family size, genetic variance, selected proportion and family weight in the index. Implications on breeding operations are discussed
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