(1). The blond color of plumage in the ring dove is sex-linked in inheritance when the blond ring dove is crossed with the white ring dove, the male being homogametic and the female heterogametic. (2). The blond color of plumage in the ring dove is inherited as an autosomal character when the blond ring dove is crossed with the albino ring dove (" Albino I "), blond being a simple Mendelian dominant over albino. (3). Ring doves of blonc! color in plumage appear in the offspring produced from the crossing of the albino ring dove (" Albino I ") with the white ring dove. (4). The blond color of plumage in the ring dove is developed by the combination of two factors, the one being that which is responsible for the white :plumage color and the dark eye color characteristic of the white ring dove, and the other being the intensity factor. The intensity factor can not develop any coloration by itself. It leaves the bird an albino, the plumage being snow-white and the eye red. (5). The factor for the characteristic white plumage color and eye color of the white ring dove is denoted by C and the intensity factor by I. (6). The factor C is autosomal and the factor I is sex-linked. (7). The albino ring dove which has the I-factor but is lacking in the C-factor, named "Albina I," is considered to have occurred in consequence of the gene mutation, the c having mutated to C. This new kind of ring dove breeds true and has established a new race. (8). Another kind of albino ring dove is expected to be bred, which is lacking in both C and I and will be named "Albino II," viz., ccZiW and CCZiZi. In conclusion, acknowledgment is due to Prof. Y. TANAKA, Prof. Y. TAKEZAKI, and Prof. M. So, to whom the writer is indebted for valuable suggestions in accomplishing this work.
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