Table 2.
Facial dimensions: Narrow-sense heritability estimations (h2) and associated standard errors (SE). Statistical significant estimations (α = 0.05) are in bold. The proportion of variation explained by the significant covariates (α = 0.1) is also provided. Each measure corresponds to the distance between two landmarks (see Table 1 for definitions) and has been assigned to a minor function region within the face (although some distances may cover several regions)
Distance | Covariates | |||||||
---|---|---|---|---|---|---|---|---|
Measure | Landmarks | Howells | h2 | SE | P | Variance explained | Significant covariates | |
Total | height | ss>n | NPH* | 0.34 | 0.13 | 0.002 | 0.15 | sex |
length | ss>ba | BPL* | 0.32 | 0.12 | 0.001 | 0.14 | sex | |
breadth | zy r>zy l | ZYB | 0.28 | 0.13 | 0.008 | 0.43 | sex, year birth | |
Orbital | breadth | fmor r>fmo l | FMB | 0.40 | 0.13 | 0.001 | 0.19 | sex |
length | or l>oc l | 0.35 | 0.14 | 0.004 | 0.06 | sex | ||
breadth | ek r>ek l | EKB | 0.34 | 0.14 | 0.005 | 0.17 | sex, year birth | |
breadth | mf r>mf l | DKB* | 0.33 | 0.13 | 0.003 | 0.05 | sex | |
height | or l>fmo l | 0.29 | 0.14 | 0.015 | − | − | ||
breadth | mf l>ek l | OBB* | 0.28 | 0.14 | 0.013 | 0.07 | sex | |
Nasal | height | n>nar r/l | NLH | 0.43 | 0.13 | 0.000 | 0.13 | sex |
length | ss>pns | 0.38 | 0.14 | 0.001 | 0.19 | sex, year birth | ||
breadth | al r>al l | NLB | 0.00 | 0.00 | 0.500 | 0.05 | sex, year birth | |
Zygomatic | height | szt l>izt l | 0.38 | 0.13 | 0.001 | 0.11 | sex, deformation, year birth | |
length | zym l>gle l | 0.37 | 0.12 | 0.000 | 0.15 | sex, year birth | ||
height | zyma l>fmo l | 0.34 | 0.13 | 0.004 | 0.10 | sex | ||
length | izt l>mw l | 0.28 | 0.11 | 0.002 | 0.15 | sex | ||
height | zym l> or l | WMH | 0.24 | 0.12 | 0.014 | 0.13 | sex | |
height | zyo l>fmo l | 0.23 | 0.14 | 0.029 | 0.32 | sex | ||
length | or l>izt l | 0.22 | 0.12 | 0.024 | 0.17 | sex, year birth | ||
length | fmo l>fmt l | 0.22 | 0.12 | 0.020 | 0.04 | sex | ||
length | zyma l>izt l | IML | 0.22 | 0.13 | 0.037 | 0.13 | sex, deformation, year birth | |
length | zyo l>izt l | XML | 0.20 | 0.11 | 0.018 | 0.23 | sex, deformation, year birth | |
breadth | ju r>ju l | JUB | 0.19 | 0.13 | 0.071 | 0.38 | sex, year birth | |
height | zyo l>zyma l | 0.09 | 0.10 | 0.143 | 0.13 | sex | ||
breadth | zymar>zyma l | ZMB | 0.07 | 0.10 | 0.232 | 0.23 | sex, year birth | |
height | or l>zyma l | 0.03 | 0.10 | 0.364 | 0.13 | sex |
A close approximation to the exact Howell's measurements (1973).