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Application of the PLS to the potato data suggested that there was only one factor of relevance for prediction. It explains some 40% of the variation in the Y matrix.

The Factor 1 loadings are presented here in rank order. This places dry matter and crisp colour at one end of the scale and leaf roll virus and common scab at the other end.

Crisp colour assessment is known to be positively correlated with dry matter content. Also, leaf roll virus susceptibility is known to be negatively correlated with DM content of tubers.

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Partial Least Squares Regression 27.2.96