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Article
Gene Flow in Populations of the Seven-Spotted Lady Beetle, Coccinella septempunctata
Journal of Heredity
  • E. S. Krafsur, Iowa State University
  • J. J. Obrycki, Iowa State University
  • R. V. Flanders, United States Department of Agriculture
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
1-1-1992
Abstract
Polyacrylamide gel electrophoresis was used to reveal gene diversity in exotic North American Coccinella Septempunctata populations. This lady beetle recently spread across the northern Nearctic. Sixteen of 28 putative loci were polymorphic; average gene diversity for all loci was 0.1598 ± 0.041. Gene frequencies were estimated at eight polymorphic loci in natural North American beetles from Arkansas, Delaware, lowa, Kansas, New York, Oregon, and Michigan. Also studied were F2 beetles from four laboratory colonies that originated in Eurasia, along with field-collected beetles from France, Greece, and Sicily. Gene diversity among the Nearctic beetles was as great as that among the Palearctic beetles. Analysis of variance by Wright's method showed that only 29% of the variance in gene frequencies was between USDA cultures, Palearctic, and Nearctic beetles; 71% of the genetic variance was shared by beetles within the 21 subpopulations. No evidence of bottlenecks of drift was detected among the Nearctic subpopulations, and gene flow was essentially unrestricted.
Comments

This article is from Journal of Heredity 83 (1992): 440.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
E. S. Krafsur, J. J. Obrycki and R. V. Flanders. "Gene Flow in Populations of the Seven-Spotted Lady Beetle, Coccinella septempunctata" Journal of Heredity Vol. 83 Iss. 6 (1992) p. 440 - 444
Available at: http://works.bepress.com/elliot-krafsur/18/