Fig. 2

2.1 A. Phenotype of a six-rowed Hexastichon barley vrs1.a1 mutant (left) compared to cultivar Bowman with a two-rowed Distichion Vrs1.b spike (right). B. Spikelets of a vrs1.a1 plant. Each central spikelet is flanked by two lateral spikelets. All spikelets are fertile in six-rowed barley. The awns of the lateral spikelets are shorter than the awn of the central spikelet. 2.2 A Deficiens (Vrs1.t) spike to the left compared to Bowman with a spike of Distichion (Vrs1.b) to the right. Deficiens barley has rudimentary lateral spikelets