拟暗果蝇染色体和酶多态性的微观地理分化
Microgeographic differentiation of chromosomal and enzyme polymorphisms in Drosophila persimilis.
作者信息
Taylor C E, Powell J R
出版信息
Genetics. 1977 Apr;85(4):681-95. doi: 10.1093/genetics/85.4.681.
Abstract
We studied microgeographic and temporal genetic differentiation in natural populations of Drosophila persimilis with respect to chromosome inversion and enzyme polymorphisms. Both inversion frequencies and allozyme frequencies varied significantly over short distances. Neither differed significantly between morning and evening collections. Because several studies of the dispersal behavior of this species have been performed, we attempt to fit the observed data to mathematical models which relate dispersion to random genetic drift and to spatially varying selection coefficients. We conclude that the observations are due at least partly to behavioral differences among genotypes. i.e., habitat preferences. These results have implications for genetic load theory and models of selection in heterogeneous environments.
摘要
我们研究了拟果蝇自然种群在染色体倒位和酶多态性方面的微观地理和时间遗传分化。倒位频率和等位酶频率在短距离内都有显著变化。早晚采集的样本在这两方面均无显著差异。由于已经对该物种的扩散行为进行了多项研究，我们试图将观测数据拟合到数学模型，这些模型将扩散与随机遗传漂变以及空间变化的选择系数联系起来。我们得出结论，这些观测结果至少部分归因于基因型之间的行为差异，即栖息地偏好。这些结果对遗传负荷理论和异质环境中的选择模型具有启示意义。
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