Gene constitution of a newly found population of Japanese native chickens in southern region of Ehime prefecture, Shikoku, Japan
2000
Tanabe, Y. (Azabu Univ., Sagamihara, Kanagawa (Japan). Faculty of Veterinary Medicine) | Kano, H. | Kinoshita, K. | Taniwaki, O. | Okabayashi, H.
Japanese native chicken population is newly found in southern region of Ehime Prefecture in Shikoku. The measurements of external traits and the collecting of blood samples from 121 birds were performed. Size of the chickens was small, weighing 1,091g for adult males and 796g for adult females. The population varied in plumage and skin colors, more than the Tosajidori, one of the oldest Japanese native chicken breed, and originating in Kochi Prefecture, Shikoku. High frequencies of C, e+, s, Mo, w and ld were always observed in the five polymorphic loci of the population, whereas these loci were monomorphic in the Tosajidori. Blood samples were analyzed for protein polymorphisms by starch gel or polyacrylamide gel electrophoresis. Polymorphisms were observed in nine loci, that is Tf. Alb, PasA, Akp, Akp-2, Es-1, Amy-1, Ct and 6-PGD. A dendrogram based on genetic distances was drawn to elucidate phylogenetic relationships of 44 breeds or populations of the chickens. Relative close relations were observed among the Ehime native chicken population, the Tosajidori, the Ohiki (the Minohikichabo) and the Koshamo. The Tosajidoris in earlier days were much more polymorphic in plumage, skin and ear lobe colors, and were similar to the Ehime native population. The present feature of the population may reflect a prototype of the Tosajidori. It is suggested that the Ehime native chicken population (which we propose to name the Ehimejidori) and Tosajidori deriverd from a common an
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