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Crop Science Abstract -

A Search for High Net Photosynthetic Rate among Soybean Genotypes1


This article in CS

  1. Vol. 9 No. 6, p. 840-841
    Received: Apr 10, 1969

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  1. R. Q. Cannell,
  2. W. A. Brun and
  3. D. N. Moss2



Two thousand four hundred and lifty-eight genotypes of soybean (Glycine max (L.) Merr.) were screened for survival at a low carbon dioxide concentration near the CO2 compensation point of Zea mays L. Survival in such an atmosphere requires a low CO2 compensation point and indicates a high maximum net photosynthetic rate. None survived. The CO2 compensation points of 44 soybean genotypes, chosen from among those which died first and last in the screening procedure, were not significantly different from each other with the exception of one which was slightly higher. The CO2 compensation points of 6 other Glycine species were similar to that of Glycine max (L.) Merr.

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