EQUILIBRIUM ANALYSIS OF SEXUAL SELECTION IN DROSOPHILA MELANOGASTER
EQUILIBRIUM ANALYSIS OF SEXUAL SELECTION IN DROSOPHILA MELANOGASTER
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果蝇性选择的平衡分析
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
G. Wilkinson
中科院分区：
文献类型：
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作者：
G. Wilkinson
几个模型的性选择，无论是男性-男性的竞争和女性的选择，预测一个字符的协变交配成功应该接近平衡的强度性选择反对生存能力的选择。这一预测被用来设计实验，估计强度的性和可行性选择翅长在最近捕获的人口果蝇。对雄性的交配观察表明，在广泛的有效性比范围内，翅长的标准化性选择差异为0.24。估计翅长的遗传力为0.62后，由于性选择的预期标准化反应计算为0.15（SE = 0.15）。然后，通过比较随机交配的果蝇后代的翅长，从而防止性选择，与允许在大量交配室中获得配偶的果蝇后代的翅长，估计由于生存力选择引起的反应。结果支持一个平衡模型，因为生存力选择的标准化反应（-0.31，SE = 0.08）与性选择的估计反应符号相反，幅度相似。
Several models for sexual selection, both by male‐male competition and female choice, predict that a character which covaries with mating success should be near an equilibrium where the intensity of sexual selection opposes viability selection. This prediction was used to design experiments for estimating the intensity of sexual and viability selection on wing length in a recently captured population of Drosophila melanogaster. Observations of matings by males color‐marked for wing length indicated that the standardized sexual selection differential on wing length was 0.24 under a wide range of effective sex ratios. After estimating the heritability of wing length to be 0.62, the expected standardized response due to sexual selection was calculated as 0.15 (SE = 0.15). The response due to viability selection was then estimated by comparing wing lengths of progeny of flies that had been randomly mated, thereby preventing sexual selection, with progeny of flies that had been allowed to acquire mates in a mass‐mating chamber. The results support an equilibrium model in that the standardized response due to viability selection (−0.31, SE = 0.08) was opposite in sign and similar in magnitude to the estimated response due to sexual selection.