Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 December 1958
Published in Agron J 50:739-742 (1958)
© 1958 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Development of Spring Wheat: II. The Effect of Temperature on Responses to Photoperiod1

J. A. Riddell and George A. Gries2

Synopsis: Two varieties of spring wheat, Chinese and White Federation 38, flower earlier as the daylength increases, the former variety being much less sensitive to changes in photoperiod and temperature than the latter. Chinese was earlier under cool-temperature, short-day conditions, and White Federation 38 was earlier in a long-day, warm-temperature environment.

1 Contribution from the Department of Botany and Plant Pathology, Purdue University, Lafayette, Ind. Journal Paper No. 1237, Purdue University Agr. Exp. Sta. A portion of a thesis by the senior author in partial fulfillment of the requirements for the Ph.D. degree at Purdue University. The work was supported by a grant from the Purdue Research Foundation.

2 Former Graduate Assistant. Purdue University, now at Naugatuck Chemical Co., Division of United States Rubber Co., Bethany, Conn., and Professor of Plant Physiology, Purdue University, respectively.

Received for publication March 24, 1958.




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Journal of Natural Resources
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Environmental Quality		 The Plant Genome
Copyright © 1958 by the American Society of Agronomy.