SELECTION FOR HIGHER AND LOWER FACET NUMBERS IN THE BAR-EYED RACE OF DROSOPHILA AND THE APPEARANCE OF REVERSE MUTATIONS
| Autor: | H. G. May |
|---|---|
| Rok vydání: | 1917 |
| Předmět: | |
| Zdroj: | The Biological Bulletin. 33:361-395 |
| ISSN: | 1939-8697 0006-3185 |
| DOI: | 10.2307/1536266 |
| Popis: | Selection was carried on in the vestigial-winged, bar-eyed stock for three generations and in the long-winged, bar-eyed stock for seven generations. The facets in the eyes of 9,000 flies were counted.Selection in the vestigial-winged stock had to be discontinued on account of sterility and low production in the single lines.The sterility and low production were not due to inbreeding. Sterility was not due to inability on the part of the females to lay eggs, nor does it appear to have been the final stage in the reduction of the number of offspring.Selection in the vestigial-winged stock was effective for one generation but failed to produce further effects in the second and third generations. Return selections from the low lines were not effective.A mutation appeared in a male in line 16. It was a reducing factor and was sex-linked. The complete sterility of the offspring of this male prevented further study of the character.Selection in the long-winged stock was effective for six generations. In the down... |
| Databáze: | OpenAIRE |
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