Fig. 1. Tassel development in td1 mutants. (A) Tassel rachis of normal sibling with some spikelets removed at the base. (B) Tassel rachis of td1-Ref mutant with spikelets removed. (C) A single spikelet of td1-Ref with three glumes (numbered). (D) td1-Ref spikelet with two florets, one of which contains four stamens (arrowed). (E) Paired spikelets from a normal tassel. (F) Normal spikelet opened to reveal two florets, each with three stamens. Images are from td1-Ref introgressed into W22 and the normal siblings in an F2 family.