Parameters of regression equations describing allometric relationships in ‘Nicoter’, ‘Gala’ and ‘Braeburn’ apples between the logarithms of the distance between the calyx-stem axis and the surface of the calyx cavity (Ld) and the maximum fruit diameter, between the logarithms of the distance between the surface of the calyx cavity and the point of inflection of the vascular bundles (Le) and the maximum fruit diameter, and the logarithms of the distance between the point of inflection of the vascular bundle and the fruit surface (Lf) and the maximum fruit diameter.

Linear regression models were used throughout. The only exception was for Le in ‘Nicoter’, where a segmented linear regression model was used. The data were obtained between 17 and 163 days after full bloom (DAFB) in ‘Nicoter’ (n = 70), 14 and 136 DAFB in ‘Gala’ (n = 60) and 16 and 166 DAFB in ‘Braeburn’ (n = 70). For details see Fig 9.