SELECTION IN NATURAL AND EXPERIMENTAL POPULATIONS OF DROSOPHILA-PSEUDOOBSCURA
SELECTION IN NATURAL AND EXPERIMENTAL POPULATIONS OF DROSOPHILA-PSEUDOOBSCURA
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DOI：
10.1139/g89-041
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发表时间：
1989-01-01
期刊：
影响因子：
3.1
通讯作者：
ANDERSON, WW
中科院分区：
文献类型：
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作者：
ANDERSON, WW
Th. 使用了拟暗果蝇的反向基因排列。多布赞斯基对自然选择的开创性分析。最近的实验揭示了有助于基因排列平衡多态性的选择机制。在实验群体中，适应性、活力和生育力的两个主要组成部分都具有频率依赖性，并且稀有基因型通常具有选择优势。生存能力也依赖于密度。适应度分量的频率依赖性和密度依赖性并不普遍。有些核型受到频率或密度的强烈影响，有些受到轻微影响，有些似乎根本不受影响。杂合子优势在基因排列选择中的作用尚不清楚。它可能是整体选择中的一个重要因素，但生存力和生育力并不总是表现出杂合子优势。选择的活力和生育力成分在改变倒转频率方面似乎同样重要。雄性交配成功是自然种群选择的重要组成部分，在某一种群中已发现罕见的雄性核型具有明显的交配优势。关键词：选择，选择成分，假暗果蝇，倒位。
The inverted gene arrangements ofDrosophila pseudoobscurawere used by Th. Dobzhansky in pioneering analyses of natural selection. Recent experiments have shed light on the mechanisms of selection contributing to the balanced polymorphism for the gene arrangements. In experimental populations, both major components of fitness, viability and fertility, are frequency dependent, and rare genotypes often have a selective advantage. Viabilities are also density dependent. The frequency dependence and density dependence of the fitness components are not universal. Some karyotypes are strongly influenced by frequency or density, some are slightly influenced, and some do not appear to be influenced at all. The role of heterozygote advantage in the selection on the gene arrangements is not clear. It is probably one important element in the overall selection, but viability and fertility do not always show a heterozygote advantage. Viability and fertility components of selection seem to be about equally important in changing inversion frequencies. Male mating success is an important component of selection in natural populations, and in one population rare male karyotypes have been found to have a pronounced mating advantage.Key words: selection, selection components,Drosophila pseudoobscura, inversions.