Analysis of mtDNA sequences shows Japanese native chickens have multiple origins
- 29 May 2007
- journal article
- research article
- Published by Wiley in Animal Genetics
- Vol. 38 (3), 287-293
- https://doi.org/10.1111/j.1365-2052.2007.01604.x
Abstract
In this study, we analysed the mitochondrial DNA D‐loop region of Japanese native chickens to clarify their phylogenetic relationships, possible maternal origin and routes of introduction into Japan. Seven haplogroups (Types A–G) were identified. Types A–C were observed in Jidori, Shokoku and related breeds. However, Type C was absent in Shokoku, which was introduced from China, while most Indonesian native chickens were included in the Type C haplogroup. Types D–G were observed in Shamo and related breeds. Type E had a close genetic relationship with Chinese native chickens. Our results indicate that some breeds were not introduced into Japan as suggested in conventional literature, based on low nucleotide diversity of certain chicken breeds. Sequences originating from China and Korea could be clearly distinguished from those originating from Southeast Asia. In each group, domestic chickens were divided into the Jidori‐Shokoku and Shamo groups. These results indicate that Chinese and Korean chickens were derived from Southeast Asia. Following the domestication of red junglefowl, a non‐game type chicken was developed, and it spread to China. A game type chicken was developed in each area. Both non‐game and game chickens formed the foundation of Japanese native chickens.Keywords
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