Figure 2.

Average symptom score (percentage of leaves showing clear symptoms of CYSDV infection) for different evaluation dates (wpi: weeks post infection) and average Ct (cycle threshold) in the qRT-PCR carried out to detect CYSDV (when available). (a) BC₁S₁278; (b) BC₁S₁556; (c) BC₁S₁110. Genotypes are expressed as follows: TGR: TGR-1551; RIL: selected RIL, RIL278, 556, or 110; BC₁: first backcross to ’Bola de Oro’ of the selected RIL; BO: ’Bola de Oro’; BC₁S₁: selfing progeny from the BC₁, classified according to the genotype for marker cysdv22 for RIL278 and marker cysdv63 for RILs 556 and 110, where BC₁S₁-B is homozygous for TGR-1551 allele, BC₁S₁-H is heterozygous, and BC₁S₁-A is homozygous for ‘Bola de Oro’ allele. Bars represent standard error. Different letters in the same evaluation date indicate significant differences among genotypes (p < 0.05, LSD test).