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High Frequency of One Element of Segregation Distorter in Natural Populations of Drosophila melanogaster
Daniel L. Hartl and Nancy Hartung
Vol. 29, No. 3 (Sep., 1975), pp. 512-518
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2407263
Page Count: 7
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Seventy-five second chromosomes extracted from a population of Drosophila melanogaster near Raleigh, North Carolina, were examined for their sensitivity to segregation distorter (SD). The frequency of insensitive chromosomes was 0.48 ± 0.06. Seventeen of the insensitive chromosomes were further analyzed to determine the genetic basis of suppression. Sixteen carried the Responder (Rsp) element of the segregation distorter system. The frequency of this component of the SD system is therefore unexpectedly high. This suggests that segregation distortion may be exerting a marked influence on the genetic structure of the population.
Evolution © 1975 Society for the Study of Evolution