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Variation of Scutellar Bristles in Drosophila IV. Effects of Selection

1965; CSIRO Publishing; Volume: 18; Issue: 3 Linguagem: Inglês

10.1071/bi9650619

0004-9417

AS Fraser, W. R. Scowcroft, R. Nassar, Harold A. Angeles, Gustavo A. Bravo,

Plant and animal studies

A series of experiments of selection of scutellar bristles in D. melanogaster is described. The evidence suggest that there are three levels at which artificial selection is relatively ineffective and that these levels are not necessarily a function of homozygosity but rather of natural selection maintaining the line at a new equilibrium value. Crosses between the initial set (A set) of selection lines led to the conclusion that there is a consistent dominance of the parent with the lower scutellar value.