Figure 2

Chromosomal locations of QTLs for days to heading (DTH) under natural day-length conditions detected in BC₄F₂ populations. QTLs were detected in 366 BC₄F₂ populations derived from crosses between Koshihikari (KSH) and 11 diverse accessions of Asian rice. Consensus linkage maps of 12 rice chromosomes are depicted as ladder-structured boxes; approximate locations of 13 heading date genes isolated previously are shown. QTL positions are oriented from Hayamasari (HAY) (left) to Bleiyo (BLE) (right) in the same order as in Table 1. Vertical bars indicate confidence intervals of QTLs (2-LOD reduction on each side of the peak) and show peak LOD scores of 2.0–3.0 (green), 3.0–4.0 (orange), and >4.0 (red). Horizontal thick bars on the QTL intervals indicate those confirmed in 53 BC₄F₃ populations.