Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 22:953-955 (1982)
© 1982 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Maysin Content of Silks of Nine Maize Genotypes Grown in Diverse Environments1

N. W. Widstrom2a, A. C. Waiss, Jr.b, W. W. McMillianc, B. R. Wisemanc, C. A. Elligerd, M. S. Zuberd, R. W. Straubc, J. L. Brewbakerf, L. L. Darrahg, A. R. Hensonh, J. M. Arnoldi and J. L. Overmanj

Maysin is a flavone glycoside that exhibits antibiotic activity toward corn earworm [Heliothis zea (Boddie)] and can be present the silks of maize (Zea mays L.). Nine maize genotypes were grown at four locations in 1979 and five locations in 1980 and evaluated for relative content of maysin in their silks. Differences among maize genotypes for maysin content were highly, significant. ‘Golden Cross Bantam’ (corn earworm susceptible) and experimental hybrid 471-U6 x 81-1 (corn earworm tolerant) consistently had the lowest relative maysin content whereas P39 x ZC 2451, a susceptible sweet corn x resistant dent corn cross, consistently had the highest relative maysin content although a significant genotype by environment interaction was present. When genotype maysin means among environments were correlated, the genotypes grown in Missouri demonstrated the least agreement with genotype maysin means from other environments. The relative maysin content of silks was highest in Georgia and lowest in Hawaii, and a significantly lower level occurred in 1980 than in 1979. At this time, no biological explanation can be offered for environmental differences in average maysin content.

Key Words: Flavone • Zea mays L. • Antibiosis • Host plant resistance • Corn earworm • Heliothis zea (Boddie)

1 Contribution of the Southern, North Central, and Western Regions of USDA-ARS; the Agric. Exp. Stns. of Hawaii, Mo., and N.Y,, and DeKalb AgResearch, Inc., in cooperation with the Univ. of Georgia College of Agric. Exp. Stns., Coastal Plain Station, Tifton, GA 31793.

2a.) research geneticist, Southern Grain Insects Res. Lab., ARS, USDA, Tifton, GA.

2b.) research chemist, Western Regional Res. Lab., ARS, USDA, Berkeley, CA 94710.

2c.) research entomologist, Southern Grain Insects Res. Lab, ARS, Tifton, GA.

2d.) professor, Univ. of Missouri, Columbia, MO 65201.

2e.) associate professor, Cornell Univ., Geneva, NY, 14456.

2f.) professor, Univ. of Hawaii, Honolulu, HI 96822.

2g.) research geneticist, ARS, USDA.

2h.) graduate assistant, Univ. of Missouri, Columbia, MO.

2i.) plant breeder.

2j.) entomologist, DeKalb AgResearch, Inc., Union City, TN 38261.

Received for publication August 13, 1981.




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Copyright © 1982 by the Crop Science Society of America.