Effect of life stage, breeding conditions, and genetic line on shape and topographic parameters. Two comparisons are presented: Balan W/Balan L (life stage estimated by the cubic root of weight) and Balan L/Swiss (life stage directly provided by age). The models include life stage, group and interaction (W:G or Age:G) on shape (estimated by scores on PC1) and topographic parameters. p‐values of linear models are provided for the analysis of the upper molar row (UMR) and the first upper molar (UM1). In bold: p < 0.001; underlined: p < 0.01; in italics: p < 0.05