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Table 2 Percentage of variance explained by successive shape axes for each module of the mandible

From: Modularity as a source of new morphological variation in the mandible of hybrid mice

 

PC1

PC2

PC3

PC4

Mandibule

39.2

13.8

9.3

7.6

Alveolar

46.4

14.0

12.0

7.8

Ramus

45.6

14.1

10.0

9.5

IncisorZ

54.9

21.0

9.4

6.2

MolarZ

48.6

24.7

10.6

7.0

Coronoid

74.7

10.1

6.5

4.9

Condyle

54.5

16.7

10.8

4.5

Angular

43.3

23.3

16.5

6.8

  1. The shape of each module was analyzed using a principal component analysis on the Cartesian coordinates of the landmarks and sliding landmarks after a Procrustes superimposition. Difference between parental groups is expected to be displayed on the first axis and transgression characterizing hybrids on the second axis. The percentage of variance explained by the successive axes allows evaluating the relative importance of the signal displayed on each axis.