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Genotypic-Environmental Interactions for Sweet Corn Hybrids Produced by the Conventional and Cytoplasmic-Genetic Male Sterile Methods¹

Genotypic-environmental interactions were ascertained for 13 plant and ear characters of importance in sweet corn (Zea mays L.). The experiment consisted of 14 hybrids evaluated at each of 5 locations for 3 consecutive years. The results suggest the manner in which each character should be evaluated. In addition, comparisons were made between hybrids produced by the conventional method and hybrids produced by the cyto-sterile method. The differences between the two types for most economic characters were insignificant

Key Words: corn breeding • Zea mays L • male sterile • genotypic-environmental interaction • regional breeding

² Associate Professor, Department of Horticulture. The Pennsylvania State University, University Park, Pa. 16802; Associate Professor, Department of Horticulture, University of Maryland, College Park, Md.; Geneticist, U.S. Department of Agriculture, Vegetahle Breeding Laboratory, Charleston, S. C.; and Professor, Department of Horticulture, University of Massachusetts, Amherst, Mass., respectfully.