The sample data are yields from the 1993 Ontario winter wheat (Triticum aestivum L.) performance trials, in which 18 cultivars were tested at nine locations (Yan and Kang 2003).
A data frame with 18 observations on the following 10 variables.
Yan W, Kang MS (2003). “GGE Biplot Analysis: A Graphical Tool for Breeders, Geneticists, and Agronomists.” CRC Press, Boca Raton, FL, USA.
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