Figure 1.

The bsl Mutants in S. viridis Show Abnormal Inflorescence and Whole-Plant Phenotypes.

(A) Plant morphology of (left to right) wild-type A10.1, bsl1-2, and bsl1-1 mutants. Bar = 10 cm.

(B) Compared with wild-type A10.1 (left), bsl1-1 (right) and bsl1-2 (middle) mutant panicles are skinnier and have reduced bristle phenotypes. Bar = 2 cm.

(C) Spikelet clusters born on primary branches from (left to right) wild-type A10.1, bsl1-2, and bsl1-1 show little to no bristle development. For A10.1, a mature spikelet is marked by a white asterisk and a bristle is marked by a white arrow. Bar = 2 mm.

(D) Representative examples of two seeds (arrows) produced within a single spikelet from bsl1-2 (middle) and bsl1-1 (right), compared with the typical single seed phenotype from wild-type spikelets (left). Bar = 2 mm.

(E) Seed phenotypes of (left to right) A10.1, bsl1-2, and bsl1-1 mutants. Seed size is significantly reduced in the mutants. Bar = 1 mm.