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With the aim of elucidating the evolutionary origin of Japanese domesticated chickens, this study evolutionarily analyzed 85 chicken mtDNA sequences. Thirty-four various ornamental chickens, 42 fighting cocks (Shamo), and nine long-crowing chickens (Naganakidori) were included. Of the Shamo, 18 were sampled from Okinawa, while the remaining 24 were collected in other islands around Japan. In addition,...
Chickens with exceptionally long crow are often favored all over the world, and connoisseur breeders have bred certain types of chicken exclusively for this trait. In Japan, three chicken varieties have been specifically bred to develop an exceptionally long crow of over 15 s. Although these three long-crowing chickens, Naganakidori, are honored as heritage varieties of Japan, the domestication process...
The tradition of cockfighting is widespread throughout the world. There is no doubt that the gamecock has evolved together with the human culture of cockfighting for a long time. In Japan, there is a group of gamecocks called ''Shamo'' that are used specifically for cockfighting. However, the process of the geographic distribution of cockfighting and the influx route of gamecocks into Japan are totally...
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