Table 2

Significant associations detected for the dilution-related traits and the Grey-Intensity trait. For each significant association, the position, and gene effect estimates (additive and dominance) are detailed. See Methods for further details about the trait categories.

Chrom.
Trait
Position (cM)
F-value
pc-value
Additive Effect
Dominance Effect

5
Quantitative-Dilution
68
452.0
<0.0001
0.93 ***
-0.06
5
Quantitative-Black
68
436.6
<0.0001
0.94 ***
-0.11 *
5
Quantitative-Red
69
125.1
<0.0001
0.86 ***
-0.14
28
Quantitative-Dilution
0
4.9
0.016
-0.19 **
0.00
28
Quantitative-Red
0
5.9
0.019
-0.39 ***
0.18
28
Grey-Intensity▲▲
1
5.3
0.016
-0.12
-0.32 **

Quantitative-Dilution (443 individuals included in analysis): White (1), Pale colour (2; Light-Red and Grey), Dark colour (3; Dark-Red and Black).

Quantitative-Black (327): White, only whites of ED- genotype at MC1R (1), Grey (2), Black (3).

Quantitative-Red (130): White, excluding whites of ED- genotype at MC1R (1), Light-Red (2), Dark-Red (3).

Grey-Intensity (141): Light-Grey (1), Dark-Grey (2)

pc-value: chromosome-wide p-value

* p-value < 0.05; ** p-value < 0.01; ** p-value < 0.001

Includes MC1R genotype (ED-, E+e, ee) as a fixed effect.

▲▲ Includes SILV c.64A>G genotype as a fixed effect.

Gutiérrez-Gil et al. BMC Genetics 2007 8:56   doi:10.1186/1471-2156-8-56