The genetic structure of the Raleigh natural population of Drosophila melanogaster revisited

Shinichi Kusakabe, Yumi Yamaguchi, Hiroshi Baba, Terumi Mukai

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Abstract

The Raleigh natural population of Drosophila melanogaster was reanalyzed with special attention to possible dysgenic effects during the extraction of chromosomes. About 600 second chromosomes were extracted from the Raleigh natural population, half in the cytoplasm of wild-caught females (native genetic background) and half in the cytoplasm of the laboratory line, C160(In(2LR)SM1, Cy/In(2LR)bw(VI)) (foreign genetic background). We could not find significant differences between the two extraction schemes in the frequency of lethal second chromosomes (Q = 0.252 for the lines with the negative genetic background vs. 0.231 for the lines with the foreign genetic background) or in the homozygous detrimental (D) and lethal (L) loads (D = 0.210 vs. 0.251; L = 0.287 vs. 0.264). The effective size of the population was estimated to be ~ 19,000, based on the allelism rate of lethal-bearing chromosomes. The homozygous load markedly decreased in the 15 years since a previous study of the same population.

Original languageEnglish
Pages (from-to)679-685
Number of pages7
JournalGenetics
Volume154
Issue number2
Publication statusPublished - 2000 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Genetics

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    Kusakabe, S., Yamaguchi, Y., Baba, H., & Mukai, T. (2000). The genetic structure of the Raleigh natural population of Drosophila melanogaster revisited. Genetics, 154(2), 679-685.