Figure 2.

Fine mapping of CAR8 using homozygous recombinant lines (BC₅F₇). Molecular markers are shown from the short arm (left) to the long arm (right) of chromosome 8. White segments, homozygous for “Koshihikari” alleles; black segments, homozygous for “Habataki” alleles. Field-grown plants were used. CO₂ assimilation rate of flag leaves was measured at an ambient CO₂ concentration of 370 μmol mol⁻¹, a PPFD of 2000 μmol photons m⁻² s⁻¹, a leaf-to-air vapor pressure difference of 1.3–1.6 kPa, and an air temperature of 30°C. Black bars in graphs indicate significant difference from “Koshihikari” at the 5% level by Dunnett's test. Error bars indicate SD (n = 3).