Varietal differences in potato tuber greening

Greening reactions of 144 potato varieties (16 russet, 29 red, 99 white) were evaluated. Three components of greening (external color, internal color, and depth of color) were measured. In general, depth of greening was less in russetted varieties than in white varieties. Red varieties showed less discoloration for all three components. The three greening components appeared to be independent, and might be inherited separately.