Table 1 Candidate genes for plumage color and bill morphology.

FILIP1L

CHR1

3

0

Wnt pathway inhibitor

FSTL1

CHR1^a

1

0

Bone morphogenic protein inhibitor

TSK

CHR1^a

12

2

Bone morphogenic protein inhibitor

FZD4

CHR1^a

0

0

Wnt pathway inhibitor

TYR

CHR1^a

17

1

Catalyzes the initial step leading to

melanin production

ATP8A2

CHR1^a

14

8

ATPase phospholipid transporting

STARD13

CHR1^a

27

3

StAR-related lipid transfer domain

TYRP2

CHR1^a

24

7

Regulates eumelanin and phaeomelanin

IL1R1

CHR1

13

13

SFRP4 enhancer and differentially

expressed in redpolls

PKS15/1

CHR2

67

37

Possible homology with locus affecting

color accumulation in Budgerigars

SFRP4

CHR2

1

1

Wnt and bone morphogenesis modulator