54 INHERITANCE IN POULTRY. 



Father. — A Tosa fowl bred at the station, No. 8a, "General Oyama," 

 referred to at page 46. 



RESULTS. 



The produce wa.s 5 females and 16 males (fig. 40). They are all blocky 

 birds, very different from the Tosa fowl, but longer than the Brahma. The 

 maternal or Brahma type is, however, predominant. Only the first genera- 

 tion of hybrids has been reared. 



1 . Shafting. — The male hybrids are mostly without shafting on the feath- 

 ers of the back and the wing coverts. Two, however, show clear yellow 

 shafting on these feathers, and in two others the shafting is a light buff 

 color. The female hybrids have these feathers shafted. Shafting is domi- 

 nant in the female hybrids. It is doubtfully transferred to some males. 



2. Hackle Lacing. — This showed on all hybrids of both sexes. 



3. Body I,acing. — In the male hybrids the saddle feathers and soiaetimes 

 the tail coverts are laced with yellow as in the Brahma. Such lacing does 

 not appear on the female. Lacing in the male sex appears to be dominant. 



4. Penciling. — This appears as typical penciling or as barring on the back 

 and saddle and on the exposed parts of the secondaries of the female hybrids. 

 It does not appear on the males. Penciling seems to be dominant over 

 mossiness and to be confined to the female sex. 



5. Red Wing-Bak. — This is present in all of the first hybrid males, but the 

 red is deeper and spreads farther over each feather than in the Dark Brahma, 

 the red of the Tosa fowl having its effect. The female is without wing-bar 

 as in the female parents. 



6. White Wing- Bow. — Of 13 hybrid males four show no white in the 

 upper wing coverts (fig. 40) ; but one of these has a light buff bow — -a tendency 

 toward white. The others have a small amount of white, which is derived 

 from the Dark Brahma. The white has, however, been clearly reduced in 

 amount. The interpretation of this result must await further breeding. 



7. Comb. — In every hybrid the comb is pea, proving the dominance of that 

 form over the single. The pea is, however, often atypical, the lateral ridges 

 being rudimentary. Dominance is not always perfect. 



8. Earlobe Color. — Every hybrid shows some white, as in the Tosa fowl ; 

 but this white tends toward yellow — a much diluted red. White seems to 

 dominate, but, if so, the dominance is imperfect. 



9. Iris Color. — This is red in the hybrids; but in two cases the red ap- 

 proaches orange. The iris color of the Tosa fowl is dominant, but imper- 

 fectly so. 



10. Foot Color. — Of 21 hybrids, all males (16) show yellow feet and all 

 females (5) willow feet. This dimorphism is not found in the parent races. 



11. Vulture Hock. — The hybrids show a tendenc}' toward long feathers 

 hanging over the heel (fig. 40). In one case these had reached a length of 

 105 mm. by six months ; in another, about 90 mm. In other cases these 



