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© IRL Press

An APL procedure to estimate genotype by environment interaction when two environments are considered

F. Stefanini and A. Camussi *

Department of Genetics and Microbiology, University of Milano via Celoria, 26-20133 Milano, Italy

*To whom reprint requests should be sent

Genotype by environment interaction (GEI) is a relevant topic in many fields of applied biology. Normal parametric approaches following analysis of variance are not suitable when large differences between error variances within environments are present. We illustrate an APL program following Yamada's approach to estimate GEIs and ancillary statistics when two environments are considered. The choice of APL environment is based on its value as a useful tool in algorithm implementation and problem-solving. Its use is suggested in biological applications where matrix algebra is involved and an understanding of the computing complexity of problems is generally not required.


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