Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1972
Published in Agron J 64:608-611 (1972)
© 1972 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationship of Seed Protein and Amino Acid Composition to Seedling Vigor and Yield of Wheat1

L. B. Lowe, G. S. Ayers and S. K. Ries2

The seed of 17 phenotypes of a Mexican semidwarf wheat (Triticum aestivum L. ‘Inia 66’) was analyzed for protein and amino acid composition. These parameters were related to seedling vigor and yield to determine if amino acid composition would give a better estimate of potential vigor and yield within a genotype than seed protein.

The seedling dry matter showed a high positive correlation with seed protein content (r = 0.93***). Analysis of amino acids in acid hydrolysates of the seed indicated that mole percent glutamic acid was positively related to seedling growth (r = 0.84***). Several other amino acids were found to be negatively correlated. Twelve phenotypes of Inia 66 (four rates of N fertilizer x three nontoxic levels of simazine [2 chloro-4,6-bis-(ethylamino)-striazine]) from a Mexican field trial were grown for second-generation grain yields in Michigan. A positive relationship was found between both seed protein content and mole percent glutamic acid and grain yield (r = 0.70** and 0.74**, respectively). Although the amino acid analyses elucidated the possible source of the protein contributing to increased seedling vigor, they did not prove to give a better estimate of seedling vigor, or yield than N analyses.

Key Words: Mole percent glutamic acid

1 Michigan Agricultural Experiment Station Journal Article No. 5445, supported by NIH Grant AM-13064 from the Institute of Arthritis and Rheumatism. The authors gratefully acknowledge the cooperation and seed provided by R. J. Laird, and N. E. Borlaug of the International Maize and Wheat Improvement Center, Mexico, and R. C. Frohberg, and K. A. Lucken of North Dakota State University, and the technical assistance of Mrs. Betty Huemoeller.

2 Research Associate, Research Technician, and Professor, respectively, Department of Horticulture, Michigan State University, East Lansing, Mich. 48823.

Received for publication January 2, 1972.




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Copyright © 1972 by the American Society of Agronomy.