Abstract
The present paper deals with the production of pearl minks by means of the cross between sapphire and palomino minks. It has been known that the character “pearl” is controlled by three recessive genes, a, p and j (Tables 1 and 2).
Mating procedures taken by the author are summarized in Table 4. From the mating of pearl to platinum minks (heterozygous for palomino) 14 non-pearl and 11 pearl minks obtained: This ratio is well fit to theoretical ratio, 1:1. The same ratio was also observed in the cross, pearl×palomino minks (heterozygous for platinum), which produced 31 non-pearl and 19 pearl minks.
A ratio of 17 non-pearl: 8 pearl minks obtained from the cross between platinum (heterozygous for palomino) and palomino minks (heterozygous for platinum) is obviously fit to a theoretical value, 3:1. However, 16 non-pearl: 5 pearl minks observed in the cross, platinum (heterozygous for palomino)×palomino minks (heterozygous for aleutian and platinum) and 81 non-pearl: 20 pearl minks obtained from the cross, platinum (heterozygous for aleutian and palomino)×palomino (heterozygous for aleutian and platinum) are not fit to an expected ratio, 15: 1; this deviation might be due to a fact that paloblue minks having a genotype AAppjj or Aappjj, are often misclassified as pearl minks.
Based on the author's results mentioned above, it is evident that “pearl” is inherited as a triple, autosomal recessive genes.
