Biometrical Letters Vol. 52(2), 2015, pp. 105-114
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EVALUATION OF EXPERIMENTAL DESIGNS IN DURUM WHEAT TRIALS
Anastasios Katsileros1, Christos Koukouvinos2 1Faculty of Crop Science, Laboratory of Plant Breeding and Biometry, Agricultural University of Athens, 11855, Athens, Greece 2Department of Mathematics, National Technical University of Athens, Zografou 15773, Athens, Greece, e-mail: ckoukouv@math.ntua.gr |
Variability among experimental plots may be a relevant problem in field genotype experiments, especially when a large number of entries are involved. Four field trials on 24 durum wheat genotypes were conducted in 2013/14 in order to evaluate the efficiency of Incomplete Block, Alpha and Augmented designs in comparison with the traditional Randomized Complete Block Design (RCBD). The results showed that the RCBD can be replaced by an Alpha design, which provides better control of variability among the experimental units when the number of treatments to be tested in an experiment exceeds twenty. The ranking of the genotypes across the four designs was not constant.
Alpha design, Incomplete Block design, Augmented design, Relative Efficiency
