Figure 1 .

Architecture of (A) inbred Tift 23DB (d2d2) and (B) inbred ICMP 451 (D2D2), the parents of the fine-mapping population at flowering time (panicle on main tiller 50% exerted). A 1-m ruler is shown for height comparison. Tift 23DB is ~50% shorter and has a greater leaf–to-stem ratio compared with ICMP 451. (C) Phenotype of the stem of Tift 23DB (left) and ICMP 451 (right) after the leaves were removed from the plants shown in (A) and (B) showing stacking of, in particular, the lower internodes in Tift 23DB compared to ICMP 451.