Figure 2
From: Heterosis and outbreeding depression in crosses between natural populations of Arabidopsis thaliana
Line cross means for number of fruits for each of the four line pairs. (a, C1↔R1; b, C2↔R2; c, B1↔S1; d, B2↔S2). Letters, symbols and error bars as in Figure 1. The dashed line is the expectation with purely additive gene action.
