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Published in Crop Sci 9:429-431 (1969)
© 1969 Crop Science Society of America
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Effect of Genotype on the Photosynthetic Rate of Soybean (Glycine max (L.) Merr.)1

R. H. Dreger, W. A. Brun and R. L. Cooper2

The net photosynthetic rate of the terminal leaflets of the first five trifoliolate leaves of nine varieties of soybean (Glycine max (L.) Merr.) was sudied inf rared-gas analysis. The variety ‘Hark’ was found to photosynthesize at a significantly higher rate than either ‘Chippewa 64’ or ‘ADO0.’ A large amount of variability was observed in plant to plant observations within the same variety. After an adjustment was made to remove this variability, significant differences were observed among the varieties tested.

Key Words: Photosynthesis

1 Contribution from the Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minn. 55101, Paper No. 6676. Scientific Journal Series.

2 Associate Scientist and Associate Professor of Agronomy, respectively; present address, U.S. Regional Soybean Laboratory, Urbana, III.

Received for publication October 3, 1968.




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