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Published in Crop Sci 14:468-471 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Seed Production of Stylosanthes humilis as Influenced by Origin and Temperature During Flowering1

H. C. Schoonover and L. R. Humphreys2

Ten selections of the tropical annual pasture legume Stylosanthes humilis, grown in controlled-environment cabinets, were induced to flower at a common time and then subjected for 60 days to 31/24, 24/17, or 17/10C, day/night temperatures. Mature seed were not formed on inflorescences differentiated at 17/10C. This regime also decreased inflorescence number and floret number. Seed production at 31/24 and 24/17C was similar, but selections differed in their response to temperature and in the pathways through which response was reflected. The cultivar ‘Lawson’ and a selection from Dayboro, Queensland, were superior. Ecological implications are considered.

Key Words: Tropical • Annual • Pasture legume

1 Contribution from the Center for Tropical Agriculture and Department of Agronomy, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611. No. 5011 Journal series of the Florida Agricultural Experiment Station.

2 Research Associate and Visiting Professor (present address: Department of Agriculture, University of Queensland, St. Lucia, Q 4067, Australia).

Received for publication December 17, 1973.




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