Fig. 1: Grain yield of five super rice varieties across four provinces in China.

a Hubei Province, b Hunan Province, c Henan Province, and d Jiangxi Province. The data represent the average values over 3 years (2015–2017). Vertical bars indicate standard deviations (n = 9). Means within each variety that share the same letter are not significantly different according to the LSD test (0.05).