Fig. 1From: Protein content and HvNAM alleles in Nordic barley (Hordeum vulgare) during a century of breedingBoxplot of improvement groups and row types for a thousand grain weight; b plant height; c protein; d Fe e Zn. Improvement groups consist of landraces and cultivars belonging to an old (released 1890–1940), mid (released 1941–1970) and late (released 1971- 2000) group respectively. The boxes display median value and the first and third quartile, the whiskers the maximum and minimum valueBack to article page