Phenotypic analysis of grain filling among Ludao, NIL-GFR1Ludao, and C-bao. A, Plants at the grain-filling stage. This is a composite image with three photographs. Bars = 10 cm. B, Seed shape after maturation. Bar = 1 cm. C to E, Morphological changes in brown rice grains of Ludao (C), NIL-GFR1Ludao (D), and C-bao (E) at five stages. Bars = 1 cm. F, Brown rice weight changes of Ludao, NIL-GFR1Ludao, and C-bao at five stages. G, Grain-filling rate changes of Ludao, NIL-GFR1Ludao, and C-bao at five stages. H, Comparison of yield traits between C-bao and NIL-GFR1Ludao in 2011. The data are means ± sd (n = 3). Student’s t test was used for statistical analysis (*, P ≤ 0.05 and **, P ≤ 0.01).