Figure 4.

F1 crosses of 12 CC strains. Strains were chosen to give progeny with heterozygous genomes except at Rabep2, since variants of Rabep2 were previously shown to cause large effects on collateral number and diameter in a panel of classical strains. ²⁴ (a) F1 lines CC049 x CC053 and CC055 x CC036 were selected, among the 8 crosses (a, b), to generate two F2 populations (c) based on their a priori power ranking (see Methods) and minimum evidence of dominance. N-sizes in base of bars. ##, ### p < 0.01, <0.001 vs. 1^st bar, ***, p < 0.001 vs. 2^nd bar; 1-sided t-tests.