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A parsimonious statistical design and breeding procedure for evaluating and selecting desirable characteristics over environments
Authors:W. T. Federer  B. T. Scully
Affiliation:(1) Biometry Unit, Department of Plant Breeding and Biometry, Cornell University, 337 Warren Hall, 14853 Ithaca, NY, USA
Abstract:The concept of stability as described in the literature does not meet all of the desirable criteria required by growers of cultivars. Various types of possible responses are discussed, and these are divided into those desirable from a grower's viewpoint and those not. Measures of stability appearing in the literature are based on variances, linear regression slopes, and/or deviations from regression. The most desirable response type would be denoted as unstable by current concepts of stability. It is shown how to simulate environments that exceed the ranges found in practice. A statistical design is described which is the height of parsimony and has the advantage that the conditions varied are known. The experimental results can then be interpreted in light of the known conditions. The design is optimally cost effective in terms of funds, material, and personnel. A breeding procedure is presented for such characteristics as desired response, stability under current definitions, tolerance (to pests, cold, drought, etc.), protein, quality, fiber, etc.Technical Report Series No. Bu-960-MA of the Biometrics Unit, Cornell University, Ithaca, N.Y.Liberty Hyde Bailey Professor Emeritus, Biometrics Unit, Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY; Assistant Professor of Vegetable Crops, IFAS, University of Florida, Everglades Research Center, Belle Glade, Fla.
Keywords:Desirable response  Response curve  Selection index  Split plot designs  Stability
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