Inheritance in Poultry (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ...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. Ir1s Color.--This is red in the hybrids; but in two cases the red approaches orange. The iris color of the Tosa fowl is dominant, but imperfectly 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 tendency 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 feathers are much reduced from the Brahma type, and in one or two cases it is doubtful if they are present. We have to do here either with a blending characteristic or else a very imperfect dominance of the vulture hock. 12. Foot Feather1ng.--This is always present in the hybrids, but is usually less heavy than in the Dark Brahma (fig. 40). Booting is dominant, but is imperfectly so. 13. Ta1l Feathers.--As none of the hybrids are over six months old, it is impossible to report fully on the inheritance of this characteristic. While in some male hybrids the tail feathers already surpass in length the middle tail feathers of the adult Brahma parent and are still growing, in no case have they made the extraordinary growth of the Tosa fowl. CONCLUSIONS. Method Of Inher1tance.--The color characteristic of shafting and penciling in the female, and body lacing, red wing bar, and white wing bow in the male, appear to dominate in the respective sexes; but dominance, if such it is, is always imperfect, in that traces of the opposite allelomorph are...