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The Journal of Heredity 1993:84(3):229-232
© 1993 The American Genetic Association 84:229-232

other

A Novel Morphological Mutation in the Hessian Fly, Mayetiola destructor

R. H. Shukle, and J. J. Stuart

The Department of Entomology, Purdue University West Lafayette, Indiana
The Agricultural Research Service USDA

Address reprint requests to Dr. Shukle, USDA-ARS, Department of Entomology, Purdue University, West Lafayette, IN 47907.

Abstract

There is economic interest in the genetics of the Hessian fly, Mayetiola destructor (Say), because host-plant resistance is the primary method of controlling this pest of wheat and fly genotypes have evolved that can live on resistant wheat. A white-eyed mutation was recently discovered in a laboratory population of the Hessian fly. This is the first morphological mutation reported for the Hessian fly. The mutation was characterized by ommatidia with white or pale facets. All other body markings and structures appeared the same as wildtype, dark-eyed flies. Three white-eyed females were selected from the laboratory population and their progeny were intermated to establish a line of white-eyed Hessian flies. Reciprocal crosses between a wild-type, darkeyed line and the white-eyed line, backcrosses of F1 progeny to the dark-eyed and whiteeyed parental lines, and F2 reciprocal crosses were conducted to determine the mechanism of inheritance. Results revealed that the whiteeyed phenotype was controlled by a single recessive, sex-linked gene (white-eyed, w). Genetic analysis of the white-eyed phenotype confirmed the previously observed unique inheritance pattern of maternal chromosomes in male Hessian flies. Males transmitted only maternally derived sex chromosomes to their progeny. Additionally, this study demonstrated that males express only maternally derived sex chromosomes in the soma. This preferential inactivation of the paternally derived sex chromosomes through elimination is a clear example of chromosome imprinting.


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