Yield of 18 varieties of winter wheat grown at 9 environments in Ontario in 1993.
A data frame with 162 observations on the following 3 variables.
yield in metric tons per hectare
The yield is the mean of several reps, measured in metric tons per hectare.
This data has often been used to illustrate GGE biplots.
Weikai Yan and M.S. Kang. GGE biplot analysis: A graphical tool for breeders, geneticists, and agronomists, 2002. CRC. Page 59.
Weikai Yan and Nicholas A. Tinker. 2006. Biplot analysis of multi-environment trial data: Principles and applications. Table 1.
Used with permission of Weikai Yan.
Weikai Yan and Manjit S. Kang and Baoluo Ma and Sheila Woods, 2007, GGE Biplot vs. AMMI Analysis of Genotype-by-Environment Data, Crop Science, 2007, 47, 641–653. http://doi.org/10.2135/cropsci2006.06.0374
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