Polymorphism of rRNA Gene Loci in the Dog
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概要
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We examined the number of ribosomal gene (rDNA) loci in the metaphase spreads of 54 dogs by FISH method. We found that in 16 dogs (30%) one or two loci were missing. The total number of rDNA loci was varied from 5 to 7 in males and from 4 to 6 in females. As the male dog consistently bears the rDNA on the Y chromosome, the polymorphism of the rDNA locus was ascribed to the absence of autosomal rDNA loci. Indeed, the frequency of polymorphism is almost equivalent in both sexes in the beagle. In one female beagle dog, remarkable intense fluorescence signals were observed at the four autosomal loci, indicating the in situ amplification of rDNA.
著者
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Shibata Hideshi
Laboratory Of Veterinary Anatomy Institute Of Symbiotic Science And Technology Tokyo University Of A
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KANDA Naotoshi
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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KANEDA Masahiro
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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Goto Motoki
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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Sube Asuka
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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Mikashima Soushi
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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SHIBATA Hideshi
Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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