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The Journal of Heredity 1978:69(1):37-50
© 1978 The American Genetic Association 69:37-50

research-article

Genetic differences between eastern and western populations of the alfalfa weevil

DOUGLAS K. SELL, EDWARD J. ARMBRUST, and GREGORY S. WHITT

Dr. Sell was formerly affiliated with the Section of Economic Entomology, Illinois Natural History Survey, Urbana; he is now chief entomologist, Farmland Industries, Inc., 3315 N. Oak Trafficway, Kansas City, MO 64116
Dr. Armbrust is with the Illinois Agricultural Experiment Station, Urbana-Champaign, Illinois 61801
Dr. Whitt is in the Department of Genetics and Development, University of Illinois at Urbana-Champaign, Illinois

Abstract

Allelic variation at five enzyme loci was investigated in eastern and western United States populations of the alfalfa weevil, Hypera postica. Significant differences in gene frequencies were observed between the eastern and western populations, some of these differences being correlated with geographic variables. The genetic data obtained strongly suggest that two genetically distinct populations of Hypera poslica exist in the United States and support the hypothesis of two different introductions of the alfalfa weevil into the United States, each introduction presumably from a different European origin.


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