Importance sélective des différences d'activité entre mâlesebony etsauvage, dans les populations artificielles deDrosophila melanogaster

Summary

(1) In homozygous state, the geneebony noticeably diminishes the sexual activity of the males.

(2) The lower activity on the part of the malese is responsible for the non-random breeding in the cross betweene and +.

(3) The degree of sexual isolation which results from this, depends not only on the genic, but also on the cytoplasmic context which accompanies theebony gene.

(4) Results of previous experiments seem to indicate that in heterozygous state, theebony mutation increases instead of diminishing the activity.

(5) Attention is drawn to the selective importance of these differences and the role they can play in artificial populations whereebony is made to compete with its normal allel.