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Chlorotic-lesion resistance in corn (Zea mays L.) to Helminthosporium maydis race O was inherited as a single recessive gene. Resistant plants in both normal and cms-T cytoplasm expressed small chlorotic lesions whereas suceptible plant exhibited large tan to brown, oval to rectangular lesions.
Key Words: Southern leaf blight of corn Maize Gene rhm
2 Assistant Plant Pathologist and Professor of Plant Pathology and Genetics, respectively, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801.
Received for publication November 25, 1972.
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