Department of Botany and Department of Molecular and Population Genetics, University of Georgia, Athens, Georgia 30602.
Genetics. 1981 Jul;98(3):613-23. doi: 10.1093/genetics/98.3.613.
Seasonal patterns of allozyme variation are examined for 12 polymorphic enzyme loci in Drosophila melanogaster. The data derive from a total of 56 samples taken from a natural population in the Summer and Fall of 1978 and 1979. Samples were obtained at approximately five-day intervals and assayed for 6-phosphogluconate dehydrogenase (6Pgd), phosphoglucomutase (Pgm) and glucose-6-phosphate dehydrogenase (G6pd). The remaining nine enzymes were assayed in an average of eight samples per season. None of the loci exhibit regular seasonal cycles of gene-frequency change, although 6Pgd does show significant, but irregular, frequency oscillations. There is also little evidence for gene-frequency differences between years, although 6Pgd is again exceptional in showing significant frequency changes between years. In addition, genotypic frequency distributions are usually consistent with random mating expectations. With the notable exception of 6Pgd, the data give a strong impression of gene-frequency homogeneity within and among years, despite obvious seasonal changes in climate and in the distribution of breeding sites.
对 1978 年和 1979 年夏、秋两季从自然种群中采集的 56 个样本的 12 个多态性酶基因座进行了同工酶变异的季节模式研究。样本每隔 5 天采集一次，用于检测 6-磷酸葡萄糖脱氢酶（6Pgd）、磷酸葡萄糖变位酶（Pgm）和葡萄糖-6-磷酸脱氢酶（G6pd）。其余 9 种酶在每个季节平均检测 8 个样本。尽管 6Pgd 确实表现出显著但不规则的频率振荡，但没有一个基因座表现出基因频率变化的规则季节性周期。虽然 6Pgd 再次表现出明显的年度频率变化，但年度间基因频率差异的证据也很少。此外，基因型频率分布通常与随机交配的预期一致。除了 6Pgd 之外，数据显示尽管气候和繁殖地点的分布明显季节性变化，但各年度和各年间的基因频率均具有高度的同质性。
