Fig. 5

5.1 Dense spike mutants often show a compact and wide spike with their awns protruding from the longitudinal axis of the plants. Mutant Pyramidatum 1 (pyr1.i) to the left compared to Bowman. 5.2 Less drastic dense spike mutants. A. Mutant Erectoides-a (ert-a.6) to the left compared to Bowman. B. Mutant ert-k.32 to the left compared to Bowman. 5.3 The barley Erectoides-c mutants display a pyramid-shaped spike phenotype due to shorter distance between the rachis internodes at the lower part of the spike. Mutant ert-c.1 to the left compared to Bowman. 5.4 Spikes of barley mutant Erectoides-m (ert-m.330) where awns and the lateral flowers have been removed. A. The rachis internode distances are irregular and the rachis nodes can sit more or less opposite to each other. B. The irregular rachis internode distance is especially pronounced in the top of the spike, which imposes twists of the spike. 5.5 Zeocriton mutants. A and B. Zeo1.a to the left compared to Bowman. C and D. Zeo2.c to the left compared to Bowman