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Accumulation of P elements in minority inversions in natural populations of Drosophila melanogaster

Published online by Cambridge University Press:  14 April 2009

Walter F. Eanes ,
Cedric Wesley  and
Brian Charlesworth
Walter F. Eanes*
Affiliation:
Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794
Cedric Wesley
Affiliation:
Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794
Brian Charlesworth
Affiliation:
Department of Ecology and Evolution, 1101 East 57th Street, University of Chicago, Chicago, IL 60637
*
†Corresponding author.
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The accumulation of a transposable element inside chromosomal inversions is examined theoretically by a mathematical model, and empirically by counts of P elements associated with inversion polymorphisms in natural populations of Drosophila melanogaster. The model demonstrates that, if heterozygosity for an inversion effectively reduces element associated production of detrimental chromosome rearrangements, a differential accumulation of elements is expected, with increased copy number inside the minority inversion. Several-fold differential accumulations are possible with certain parameter values. We present data on P element counts for inversion polymorphisms on all five chromosome arms of 157 haploid genomes from two African populations. Our observations show significantly increased numbers of elements within the regions associated with the least common, or minority arrangements, in natural inversion polymorphisms.

Type
Research Article
Information
Genetics Research , Volume 59 , Issue 1 , February 1992 , pp. 1 - 9
Copyright
Copyright © Cambridge University Press 1992

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