果蝇威氏组中的酶变异性。3. 超种多毛果蝇的变异量。
Enzyme variability in the Drosophila willistoni group. 3. Amounts of variability in the superspecies, D. paulistorum.
作者信息
Richmond R C
出版信息
Genetics. 1972 Jan;70(1):87-112. doi: 10.1093/genetics/70.1.87.
Abstract
The semispecies composing the superspecies, Drosophila paulistorum, have been analyzed for genetic variation at 17 enzyme loci. On the average a population of D. paulistorum is polymorphic for 55-67% of its loci and an average individual is heterozygous at 21% of its loci. The pattern of genetic variability found supports the hypothesis that allozyme variation is maintained in natural populations by some form of balancing selection. Evidence is presented which supports the hypothesis that glucose-metabolizing enzymes are less genetically variable than non-glucose-metabolizing enzymes. The known genetic relationships between the semispecies of D. paulistorum are discussed in the light of the frequencies of alleles at allozyme loci.
摘要
对构成复合种“圣保罗果蝇（Drosophila paulistorum）”的半种进行了17个酶位点的遗传变异分析。平均而言，圣保罗果蝇群体中55% - 67%的位点呈多态性，平均每个个体在其21%的位点上是杂合的。所发现的遗传变异模式支持了这样一种假说，即等位酶变异通过某种形式的平衡选择在自然种群中得以维持。文中提供的证据支持了以下假说：与非葡萄糖代谢酶相比，葡萄糖代谢酶的遗传变异较少。根据等位酶位点上等位基因的频率，讨论了圣保罗果蝇半种之间已知的遗传关系。
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