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Efficiency of alpha-lattice designs in international variety yield trials of barley and wheat

Published online by Cambridge University Press:  01 February 1997

S. K. YAU
S. K. YAU
Affiliation:
Germplasm Program, International Centre for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
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Abstract

Use of an alpha-lattice design in 714 international yield trials of barley, durum wheat and bread wheat in 1990/91 to 1992/93 resulted in an average efficiency 18% higher than the randomized complete block design when average variance was used as the comparison criterion. Alpha-lattice was generally most efficient when the C.V.s of the trials were high. It was also slightly more efficient for low-yielding than for high-yielding trials, and for rainfed than for irrigated trials. Since the changeover to alpha-lattice designs requires no new major input or changes in present field layout, its use for international trials is recommended.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 128 , Issue 1 , February 1997 , pp. 5 - 9
Copyright
© 1997 Cambridge University Press

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