BEHAVIOR GENETICS OF CHOICE OF OVIPOSITION SITE IN DROSOPHILA MELANOGASTER

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Abstract
Experiments were performed on the choice of oviposition site using isofemale lines of D. melanogaster isolated from natural populations. Forty isofemale lines from Katsunuma and Sapporo [Japan] were examined for their choice of oviposition sites. Possible oviposition sites were soft, medium and hard surfaces of paper which was placed into the culture medium. Significant difference in the proportion of eggs laid on the paper was detected among lines of both localities. There is apparently a large amount of genetic variation in natural populations of D. melanogaster. The oviposition site of 2 lines, which hatched from eggs collected on seeds and sacs in squeezed draff of grapes in a winery in Katsunuma, was compared. The line collected from seeds laid a significantly larger proportion of eggs on the paper than the line collected from sacs. The flies apparently choose oviposition sites in natural fields according to their genetic variations.

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