Fig. 6. rgo1 and ids1 exhibit nonallelic noncomplementation and have a synergistic double mutant phenotype. rgo1 and ids1 homozygous plants were crossed (top). The double heterozygote progeny had a reversed kernel and disrupted row phenotypes (middle). When these plants were self-pollinated, wild type (wt), rgo1-like (rgo), and double mutants with long branches (branched) were produced (bottom).