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Color inheritance in Japanese ornamental koi
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colour. Interaction between the Y-linked Snakeskin tail (Sst ) and the Grt genes gives rise to the green tail with tine black reticulated snakeskin pattern of GSS males. GSS females lack Y-linked genes and have green tail colour due to the X-linked Grt gene. In males with the wild-type hyaline tail colour allele (Grt+ ), the Sst gene is expressed as line silvery reticulations on the transparent tail (phenotype, wild-type Snakeskin; genotype, BB XG,,+ Y,,,). The genotypes of males and females of the Blond Snakeskin variety (BBS) are identical with those of the GSS strain except that they are homozygous for the recessive blond allele (bb), giving these fish an overall pale yellow colour. The Grt gene, though present, is not expressed and the tail is blond in colour. The Ssb and Sst genes are manifest as a delicate silvery iridescent pattern on the body and tail. BSS females have only the blond background coloration. With the inclusion of the X-linked Bcp gene (black caudal peduncle) in the GSS male genotype, the Grt gene manifests itself as an amber-coloured tail and the Sst gene is now expressed as a few large black spots distributed randomly on the tail. The variety bearing this colour phenotype is called Leopard because of the deep yellow tail with black spots in males (genotype, BB x Grt,Bcp Y slb,ssr).The Bcp gene interacts with the BSS genotype resulting in the Pineapple variety where the caudal peduncle is muted black and the tail is a rich yellow colour with a few small dark spots towards the caudal peduncle due to the Sst gene.
Color inheritance in Japanese ornamental koi Giora W. Wohlfartha and Shmuel Rothbardb “AgriculturalResearch Organization, Fish and Aquaculture Research Station, Dar, . Hof Hacarmel30820, Israel bYAFFI Lab, Fish Breeding Center, Can Shmuel38810, Israel
The inheritance of body colors in ornamental carp is largely unknown, in spite of the obvious theoretical and practical interest in these traits. In a preliminary investigation we carried out three single-pair spawns involving parents differing in their body coloration (white or orange) and scale appearance (pearl scales (gintin) or metallic). The results indicate that body coloration follows a simple Mendelian pattern, orange being dominant to white, and the ginrin scale pattern being dominant to metallic. These two traits are inherited independently.
Shell color, density, water depth, and growth of different lines of the Japanese pearl oyster Katsuhiko T. Wada and Akira Komaru National Research Institute ofAquacuiture, Nansei, Mie 516-01, Japan
We had reported that white shell coloration of the Japanese pearl oyster, Pinctaduficata mar-
colour. Interaction between the Y-linked Snakeskin tail (Sst ) and the Grt genes gives rise to the green tail with tine black reticulated snakeskin pattern of GSS males. GSS females lack Y-linked genes and have green tail colour due to the X-linked Grt gene. In males with the wild-type hyaline tail colour allele (Grt+ ), the Sst gene is expressed as line silvery reticulations on the transparent tail (phenotype, wild-type Snakeskin; genotype, BB XG,,+ Y,,,). The genotypes of males and females of the Blond Snakeskin variety (BBS) are identical with those of the GSS strain except that they are homozygous for the recessive blond allele (bb), giving these fish an overall pale yellow colour. The Grt gene, though present, is not expressed and the tail is blond in colour. The Ssb and Sst genes are manifest as a delicate silvery iridescent pattern on the body and tail. BSS females have only the blond background coloration. With the inclusion of the X-linked Bcp gene (black caudal peduncle) in the GSS male genotype, the Grt gene manifests itself as an amber-coloured tail and the Sst gene is now expressed as a few large black spots distributed randomly on the tail. The variety bearing this colour phenotype is called Leopard because of the deep yellow tail with black spots in males (genotype, BB x Grt,Bcp Y slb,ssr).The Bcp gene interacts with the BSS genotype resulting in the Pineapple variety where the caudal peduncle is muted black and the tail is a rich yellow colour with a few small dark spots towards the caudal peduncle due to the Sst gene.
Color inheritance in Japanese ornamental koi Giora W. Wohlfartha and Shmuel Rothbardb “AgriculturalResearch Organization, Fish and Aquaculture Research Station, Dar, . Hof Hacarmel30820, Israel bYAFFI Lab, Fish Breeding Center, Can Shmuel38810, Israel
The inheritance of body colors in ornamental carp is largely unknown, in spite of the obvious theoretical and practical interest in these traits. In a preliminary investigation we carried out three single-pair spawns involving parents differing in their body coloration (white or orange) and scale appearance (pearl scales (gintin) or metallic). The results indicate that body coloration follows a simple Mendelian pattern, orange being dominant to white, and the ginrin scale pattern being dominant to metallic. These two traits are inherited independently.
Shell color, density, water depth, and growth of different lines of the Japanese pearl oyster Katsuhiko T. Wada and Akira Komaru National Research Institute ofAquacuiture, Nansei, Mie 516-01, Japan
We had reported that white shell coloration of the Japanese pearl oyster, Pinctaduficata mar-