Graphic representation of the significant and consistent effects detected in the analysis of fruit quality in the sweet orange and citrange lines. A) ‘ontogeny’ effect detected in sweet orange lines. B) ‘Ploidy’ effect detected in citrange lines. C) Images showing the representative appearance of mature diploid (2n) and tetraploid (4n) fruit from Carrizo citrange trees. The scale bar represents 2 cm. Level of significance achieved in the planned contrasts: *p < 0.01; **p < 0.001; ***p < 0.0001. Seasons analyzed: S1, season 2004; S2, season 2005; S3, season 2006; S4, season 2007. Average ± SE from contrasts showing significant differences (p < 0.01) in at least two seasons are represented.