Polymorphism of rRNA Gene Loci in the Dog

Journal of Veterinary Medical Science

Hideshi SHIBATA¹  Masahiro KANEDA¹  Motoki GOTO¹  Asuka SUBE¹  Naotoshi KANDA¹  Soushi MIKASHIMA¹ 

[1] Laboratory of Veterinary Anatomy, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology

关键词: canine;    chromosome;    FISH;    polymorphism;    rDNA;   

DOI  :  10.1292/jvms.10-0266

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(15)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.

【 授权许可】

Unknown