Table 3 Procrustes variance within modules and p-values obtained from the pairwise comparisons between the main groups (significant differences with *; p < 0.05)
|  | Draft horses | Mongolian horses | Przewalski’s horses | Racehorses |
|---|---|---|---|---|
AON | ||||
 Procrustes variance | 1.60e−03 | 2.05e−03 | 2.51e−03 | 2.48e−03 |
 Mongolian horses | 2.5e−01 |  |  |  |
 Przewalski’s horses | 2.1e−02* | 2.5e−01 |  |  |
 Racehorses | 1.8e−02* | 2.5e−01 | 9.3e−01 | – |
ORB | ||||
 Procrustes variance | 1.22e−03 | 1.61e−03 | 1.83e−03 | 1.56e−03 |
 Mongolian horses | 4.5e−01 |  |  |  |
 Przewalski’s horses | 2.2e−01 | 5.6e−01 |  |  |
 Racehorses | 4.5e−01 | 8.5e−01 | 5.6e−01 | – |
MOL | ||||
 Procrustes variance | 1.34e−03 | 2.42e−03 | 3.15e−03 | 2.07e−03 |
 Mongolian horses | 3.4e−02* |  |  |  |
 Przewalski’s horses | 6.0e−03* | 1.3e−01 |  |  |
 Racehorses | 1.3e−01 | 4.3e−01 | 3.4e−02* | – |
ZP | ||||
 Procrustes variance | 1.47e−03 | 1.55e−03 | 2.37e−03 | 1.85e−03 |
 Mongolian horses | 8.0e−01 |  |  |  |
 Przewalski’s horses | 5.4e−02 | 6.0e−02 |  |  |
 Racehorses | 3.6e−01 | 4.6e−01 | 3.0e−01 | – |
CB | ||||
 Procrustes variance | 3.91e−03 | 3.70e−03 | 4.39e−03 | 7.50e−03 |
 Mongolian horses | 8.3e−01 |  |  |  |
 Przewalski’s horses | 8.2e−01 | 8.1e−01 |  |  |
 Racehorses | 4.5e−01 | 4.5e−01 | 6.6e−01 | – |
CV | ||||
 Procrustes variance | 2.94e−03 | 2.93e−03 | 3.80e−03 | 2.96e−03 |
 Mongolian horses | 1.0 |  |  |  |
 Przewalski’s horses | 5.3e−01 | 5.3e−01 |  |  |
 Racehorses | 1.0 | 1.0 | 5.3e−01 | – |