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Author (up) Messina, F.J. openurl 
  Title Genetic contribution to the dispersal polymorphism of the cowpea weevil Coleoptera Bruchidae Type Journal Article
  Year 1987 Publication Annals of the Entomological Society of America Abbreviated Journal Ann Entomol Soc Am  
  Volume 80 Issue 1 Pages 12-16  
  Keywords  
  Abstract The seed beetle, Callosobruchus maculatus (F.), exhibits a crowding-induced dispersal polymorphism; high densities of

larvae trigger development of dispersing or “active” beetles. This study demonstrates that a genetic component

also influences morph determination. Reciprocal, single-pair crosses were performed between a monomorphic, laboratory

population and a polymorphic, wild population, and all larvae were reared in a common, crowded environment. Morph ratios

in the hybrids were intermediate to those of the parental strains, but displayed a strong maternal effect. The dispersal

polymorphism of C. maculatus appears to be controlled by a complex genotype/environment interaction, and contrasts with

the purely genetic wing dimorphisms in other Coleoptera.		  
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  Notes Approved no  
  Call Number Trinity @ scott.smedley @ Serial 57  
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