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A Method for Discriminating a Japanese Brand of Chicken, the Hinai-jidori, Using Microsatellite Markers¹

K. Rikimaru^* and H. Takahashi^,2

^* Livestock Experiment Station, Akita Prefectural Agriculture, Forestry and Fisheries Research Center, Jin-guji, Daisen 019-1701, Akita, Japan; and Animal Breeding and Reproduction Research Team, National Institute of Livestock and Grassland Science, Ikenodai 2, Tsukuba 305-0901, Ibaraki, Japan

² Corresponding author: naoe{at}affrc.go.jp

The Hinai-dori is a native breed of chicken from the Akita Prefecture in Japan. A cross between the Hinai-dori and Rhode Island Red breeds has been commercialized as the Hinai-jidori chicken, one of the most popular brands of chicken in Japan. Here, a method of discriminating between the Hinai-jidori and other chickens is described. Individuals (555) of the Hinai-dori breed were analyzed by using 37 microsatellite markers on the Z chromosome. Fourteen of the marker loci (ABR1003, ADL0250, ABR0241, ABR0311, ABR1004, ABR1013, ABR0633, ABR1005, ABR0089, ABR1007, ABR1001, ABR1009, ABR1010, and ABR1011) were fixed in the Hinai-dori breed. So, the Hinai-jidori chicken, F₁ of the Hinai-dori breed, must have at least one of the alleles with all fixed loci. When these alleles on 14 loci from the Hinai-dori breed were not detected in meat samples, it would be judged that the samples were not the Hinai-jidori chicken. Thus, the use of these 14 microsatellite markers provides a practical method of accurately discriminating the Hinai-jidori chicken from other chickens on the market.

Key Words: chicken • brand discrimination • microsatellite marker • Hinai-dori breed • F₁ meat

¹ This study was supported in part by grants from the Ito Foundation, Tokyo, Japan, and the Integrated Research Program for Functionality and Safety of Food toward the Establishment of a Healthy Diet, a program of the Ministry of Agriculture, Forestry, and Fisheries of Japan.