Genetic Variability of mtDNA D-loop Region in Korean Native Chickens
2009
Hoque, Md. Rashedul, Chungnam National University, Daejeon, Republic of Korea | Jung, K.C., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Park, B.K., Kongju National University, Yesan, Republic of Korea | Choi, K.D., Hankyong National University, Ansung, Republic of Korea | Lee, J.H., Chungnam National University, Daejeon, Republic of Korea
In order to determine the origin and genetic diversity among chicken breeds, mitochondrial (mt) DNA D-loop sequences have been widely used. In this study, 41 individuals from four breeds (Korean native chicken (Black and Brown) and two imported breeds, Rhode Island Red and Cornish) were used for identifying genetic relationships with other chicken breeds. We obtained ten haplotypes and the highest number of haplotype was represented by eight individuals each from haplotype 1 and haplotype 2. Neighbor-joining phylogenetic tree indicates that the black and brown Korean native chicken breeds were mixed in haplotype 2 and they were closely related with the red jungle fowl (Gallus gallus). We also investigated whether the D-loop hypervariable region in chicken mtDNA can be used for the breed identification marker. The results indicated that the combination of the SNPs in the D-loop region can be possibly used for the breed discriminating markers. The results obtained in this study can be used for designing proper breeding and conservation strategies for Korean native chicken, as well as development of breed identification markers.
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