| Research Abstract |
Japanese native chicken populations are newly found in southern Ehime Prefecture in Shikoku. The measurements of external traits and the collecting blood samples from 121 birds were performed. Size of the chickens was small, weighing 1091g for adult males and 796g for adult females. Plumage and skin colors of the population varied 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 ldwere always ovserved in the five polymorphic loci of the population, whereas the loci were monomorphic for the genes 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, PosA, Akp, Akp-2, Es-1, Amy-1, Ct and 6-PGD.A dendrogram based on genetic distances and scattered diagrams based on principal compoment scors were drawn to elucidate phylogenetic relationships of 35 breeds or populations of the chickens. Relative close relations were ovserved among the Ehime native chicken population, the Tosajidori and the Ohiki (the Minohiki chabo). It is suggested that the Ehime native chicken population, which we propose to name the Ehimejidori, and the Tosajidori deriverd from a commom ancester.
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