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Reproductive phenotypes. Unpollinated ears of (A) normal sibling, (B), td1-glf homozygote, (C) kn1-E1 homozygote, and (D) a double mutant. Patches of cob have failed to initiate kernel primordia in the double mutant, as seen in kn1-E1 homozygotes. (E) A longitudinal section of the same ear in D. Arrow in E points to ectopic kernel primordia in the ear core, a phenotype not seen in either single mutant.
