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Published in Crop Sci 7:407-409 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Recurrent Selection for European Corn Borer Resistance in Maize1

L. H. Penny, Gene E. Scott and W. D. Guthrie2

Three cycles of recurrent selection for leaf-feeding resistance to the European corn borer [Ostrinia nubilalis (Hübner)] were evaluated in five synthetic varieties of maize. A group of S1 lines fom the original population and from the populations derived from each cycle of selection in each variety were grown in field trials. Each line was manually infested with corn borer eggs and rated for borer leaf feeding. Two cycles of selection were sufficient to shift the frequencies of resistance genes to a high leval in all varietties. Three cycles produced essentially borer-resistant varieties.

1 Contribution from the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa, and the Crops and Entomology Research Divisions, Agricultural Research Service, U. S. Department of Agriculture, cooperating. Journal Paper No. J-5602 of the Iowa Agr. and Home Econ. Exp. Sta. Project No. 1575.

2 Research Agronomist, U. S. Department of Agriculture, and Professor, Iowa State University; Research Agronomist, U. S. Department of Agriculture; and Entomologist, U. S. Department of Agriculture, respectively. Additional personnel who contributed significantly during various stages of the selection program were A. R. Hallauer, Research Geneticist, Crops Research Division, and F. F. Dicke, D. B. Leuck, G. R. Pesho, and J. L. Huggans, Entomologists, Entomology Research Division, Agricultural Research Service, U. S. Department of Agriculture.

Received for publication March 22, 1967.




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