Associations of allozyme variation and behavior in the cowpea weevil (Callosobruchus maculatus) |
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Authors: | David J Berg and Rodger Mitchell |
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Institution: | (1) Department of Zoology, The Ohio State University, 1735 Neil Avenue, 43210 Columbus, OH, USA;(2) Present address: Department of Zoology, Miami University, 45056 Oxford, OH, USA |
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Abstract: | The cowpea weevil (Callosobruchus maculatus (Fabré)) exhibits several behavioral traits that are stable within, but vary among, strains. These traits are heritable and
quantitative. We used cellulose acetate gel electrophoresis to quantify allozyme variation within and among laboratory cultures
of four weevil strains and determine whether allozyme variation correlates with behavioral traits. Significant variation exists
at 8 of 11 loci assayed and gene frequencies are significantly different among strains. The South Indian strain (SI) is most
variable and measures of genetic distance set it apart from the other strains. It is also behaviorally unique. The Brazilian
strain (BC) is most different from SI in allozyme diversity and behavioral phenotype, while two African strains (IITA, CAM)
are intermediate in allozyme diversity and phenotype. These results are consistent with the known history of these strains
and the differences in the allozymes parallel the differences in behavioral traits. |
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Keywords: | behavior allozymes genetic variation bruchids |
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