Figure 2

Correlation networks among photosynthetic traits in F2 population. (a–c) are the correlation networks for the seedling stage (n = 281), budding stage (n = 255) and filling stage of primary spike (n = 254), respectively. Only significant correlations (p < 0.05) are shown. The strength of the correlation is reflected by the thickness of the lines and is colored from green (coefficient = 1) to red (coefficient = − 1). For details, see Supplementary Table S1.