Fig. 2.

Global variation of common-garden seed mass in sorghum accessions with respect to botanical races and precipitation at the origin. a Representative differences of seed mass among sorghum accessions, with accession ID, 100-seed mass, botanical race, and country of origin. b Violin plot of 100-seed mass of different sorghum botanical races. Data from nine botanical races in GRIN seed bank and including more than 20 accessions are shown. The means and the standard deviations of 100-seed mass of each botanical races were represented with the black crossbars. c Partial correlations between five precipitation variables and 100-seed mass of sorghum accessions. The positive partial correlation coefficients are colored by blue and the negative partial correlation coefficients are colored by red. d Correlation of 100-seed mass and log₁₀(Prc.Dry.Q + 1) for sorghum accessions. The accessions are colored by botanical race, with botanical races including less than 20 accessions colored in gray