Outi Ala-Honkola, David J. Hosken, Mollie K. Manier, Stefan Lüpold, Elizabeth M. Droge-Young, Kirstin S. Berben, William F. Collins, John M. Belote and Scott Pitnick Inbreeding reveals mode of past selection on male reproductive characters in Drosophila melanogaster Ecology and Evolution 3
We use inbreeding to reveal the mode of past selection on traits important for male reproductive success. We suggest that male attractiveness and sperm competition success may have been under directional selection, whereas sperm length has a history of stabilizing selection, despite earlier studies suggesting directional selection for longer sperm. Drosophila melanogaster lines with red or green fluorescently tagged sperm heads allowed us to distinguish between the two males in competition within the female reproductive tract.
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