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Published in Crop Sci 21:325-327 (1981)
© 1981 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Greenhouse Selection for Drought Resistance in Rice1

J. C. O'Toole and M. A. Maguling2

The protocol used in greenhouse drought resistance screening of rice, including monitoring of soil and plant water status, is described. Monitoring of dawn leaf water potential and subsequent visual scoring for drought resistance of 2,074 entries suggests that ability to maintain relatively high leaf water potential is strongly influencing selection by current visual scoring techniques. Cultivars receiving desirable scores are mainly dryland adapted rices from West Africa, Brazil, and some South and Southeast Asian hill rices.

Key Words: Drought tolerance • Leaf water potential • Soil matric potential • Visual drought scoring

1 Contribution from the Agronomy Dep., The International Rice Research Institute, P. O. Box 933, Manila, Philippines.

2 Agronomist and research aide.






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Copyright © 1981 by the Crop Science Society of America.