mtDNA polymorphisms of Japanese native horse
2009
Kawashima, S., Tokyo Univ. of Agriculture, Atsugi, Kanagawa (Japan). Faculty of Agriculture | Satta, Y.
Control region of mtDNA polymorphisms of 345 animals in 8 Japanese native horse breeds, that is Hokkaido, Kiso, Noma, Taishu, Misaki, Tokara, Miyako and Yonaguni, were analyzed. Fourteen haplotypes were recognized. From the analyses of dendrogram (Fig. 1), the topology showed one cluster including 14 haplotypes, namely no clear genetic differences were found among these haplotypes. The results were considered to maintain that Japanese native horses have been originated from Korean peninsular rout reported by NOZAWA et el, not from 2 types and 2 routs reported by HAYASHIDA. From the constitution of haplotype analyses (Table 1), It was revealed that Kiso, Misaki and Taishu breeds are maintaining a high level of genetic diversity, on the other hand, Noma and Tokara breeds are losing diversity, and 8 breeds have clearly different haplotypes, respectively. For this reason, it can be estimated that each native breed has been kept within each feeding place for a long time.
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