Fig. 2

The yield performance and grain shape of NIL-Ep and NIL-non Ep plants. A The four experimental materials plant in pot under high nitrogen treatment. B The panicles and grain numbers per panicle of the NIL-Ep and NIL non Ep. C The grain size of the NIL-Ep and NIL non Ep. D The grain numbers of different panicle locations for NIL-Ep and NIL non Ep, divided rice panicles into 24 positions from 1–1 to 12–2 according to the origin positions of branches. e.g. 1–1 represented primary branches at the top and 12–2 represented the secondary branches at the bottom. E Difference analysis of grain number in different panicle parts, the panicle is divided into 3 parts namely top (top, from 1–1 to 4–2 panicle positons), middle (mid, from 5–1 to 8–2 panicle positons) and bottom (bot, from 9–1 to 12–2 panicle positons) respectively. F Proportion of grain number in different panicle positions. G Difference analysis of grain shape. (a), (b) Significance at the 0.05 level. Scale bar, 2 cm