Title: EXPERIMENTAL EVIDENCE FOR FACTORS AFFECTING THE RELATIVE EFFICIENCY OF INDIRECT TO DIRECT SELECTION IN <i>TRIBOLIUM CASTANEUM</i>
Abstract: Uni-stage tandem selection was practiced for three traits in three different populations. An unselected random mating control population was also maintained. These populations, each replicated three times, were selected for ten generations. The three traits measured were: larval weight, developmental time and pupal weight. The factors affecting the genetic gains were discussed. It was demonstrated that indirect selection for larval weight, when selecting directly for pupal weight, is at least as efficient as selecting directly for larval weight. — The genetic gains obtained in the populations under study were compared to their theoretical expectations. They were found to be lower than expected in all selected populations. The results were explained on the basis of development of skewness in the underlying distribution, low realized selection differentials, overestimation of parameters before selection and biased estimates of genetic variances and covariances due to the presence of nonadditive genetic variance. — Further study of this problem, using an index for indirect selection, should be attempted.
Publication Year: 1969
Publication Date: 1969-03-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 2
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