Biometrical Letters Vol. 52(1), 2015, pp. 47-53
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COMPARISON OF UNIFORMITY DECISIONS IN DUS TESTING FOR FULL AND REDUCED NUMBERS OF MEASUREMENTS Wiesław Pilarczyk1, Bogna Kowalczyk2, Ewa Bakinowska1 1Department of Mathematical and Statistical Methods, Poznan University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland‚ e-mail: wpilar@up.poznan.pl, ewabak@up.poznan.pl 2The Research Centre for Cultivar Testing at Słupia Wielka, 63-022, Poland, e-mail: b.kowalczyk@coboru.pl |
It is investigated how a reduction in the number of measurements influences uniformity decisions in distinctness, uniformity and stability (DUS) testing. Using real data from DUS trials performed in Poland for several species, it is shown that when final decisions are taken after three years of testing, a reduction in the number of measurements by 50% of the numbers indicated in the Guidelines has very limited impact on decisions (rejection or approval of candidate variety). Decisions taken after one year (or two years) are more dependent on the numbers of measurements.
DUS testing, grasses, number of measurements, uniformity
