Augmented p-rep designs.
Early generation variety trials are very important in plant and tree breeding programs. Typically many entries are tested, often with very little resources available. Unreplicated trials using control plots are popular and it is common to repeat the trials at a number of locations. An alternative is to use p-rep designs, where a proportion of the test entries are replicated at each location; this can obviate the need for control plots. α-Designs are commonly used for replicated variety trials and we show how these can be adapted to produce efficient p-rep designs.
Statistical Consulting Unit, The Australian National University, Canberra 0200, Australia. Emlyn.Williams@anu.edu.au
Emlyn
E
Williams
Hans-Peter
HP
Piepho
David
D
Whitaker
D001947:Breeding; D016014:Linear Models; D018521:Plant Physiological Phenomena; D012107:Research Design / Q000706:statistics & numerical data