Prout T, Clark A G
Department of Evolution and Ecology, University of California Davis, 94305, USA.
Proc Biol Sci. 2000 Jan 22;267(1439):201-3. doi: 10.1098/rspb.2000.0988.
In Drosophila, male accessory gland fluid (seminal fluid) has multiple effects on the female's reproductive efficiency. Here, we show the effect of seminal fluid on rate of egg hatch immediately following mating. Singly mated females were remated to two classes of sterile males, one with seminal fluid and one without seminal fluid. Transfer of seminal fluid results in a strong reduction in egg hatch shortly after the mating. Also, it is shown that remating with normal males causes an immediate reduction of egg hatch followed by recovery to normal egg hatch. In all cases, unhatched eggs contained no sperm. These results are consistent with a role for seminal fluid in sperm competition, mediated by incapacitation or inefficient use of resident sperm.
在果蝇中,雄性附腺液(精液)对雌性的生殖效率有多种影响。在此,我们展示了交配后精液对卵孵化率的影响。单配雌性果蝇与两类不育雄性果蝇再次交配,一类有精液,另一类没有精液。精液的转移导致交配后不久卵孵化率大幅降低。此外,研究表明与正常雄性果蝇再次交配会导致卵孵化率立即降低,随后恢复到正常的卵孵化率。在所有情况下,未孵化的卵中都没有精子。这些结果与精液在精子竞争中的作用一致,这种作用是由驻留精子的失能或低效利用介导的。