Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 16:233-236 (1976)
© 1976 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Variability for Components of Yield Induced in Soybeans by Seed Treatment with Gamma Radiation, Fission Neutrons, and Ethylmethane Sulfonate1

B. V. Conger, L. W. Skinner and L. N. Skold2

The purpose of this study was to determine the variability for individual components of yield in soybean [Glycine max (L.) Merr.] induced by seed treatment with fission neutrons, gamma radiation, and ethylmethane sulfonate. Nine M3 populations, including three doses of each mutagen, were compared with a control for pods/plant, wt/100 seeds, and total seed wt/plant. The means for individual yield components were not significantly altered by the mutagenic treatments. A comparison of frequency distributions of populations from mutagen-treated seed vs. the control revealed differences for certain treatments. The most effective mutagen for increasing variability of the yield components was ethylmethane sulfonate.

Key Words: Mutagen • Mutation • Glycine max

1 Contribution from Dep. of Plant and Soil Science. Univ. of Tennessee, Knoxville, Tenn., and from the Comparative Animal Research Laboratory, operated by the Univ. of Tennessee for the U. S. Energy Research and Development Administration, Oak Ridge, Tenn. Partially supported by a grant from the National Soybean Crop Improvement Council.

2 Associate professor, Comparative Animal Research Laboratory; research assistant and professor, respectively, Dep. of Plant and Soil Science, Univ. of Tennessee.

Received for publication April 10, 1975.




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