Abstract
Comparative Analysis of Korean Native Chicken Populations using the Mtdna D-Loop Region Sequences
Highlights
Since 1952, Korean chicken breeds have improved
The wild type D-loop sequence analysis confirmed a base loss compared to other groups in sequences 48, 49, 50, 706, and 852, while the KCO group had base addition to 852
The KCRD, KCO, and Korean native chicken Red-line (KCR) lines had a total of five base sections in a different sequence from the wild type
Summary
Since 1952, Korean chicken breeds have improved. There are more than seven Korean native chickens or “traditional chicken” breeds that have been kept pure (Kang, 2010). Though molecular research tools such as next-generation sequencing have been developed recently (Eck et al, 2009), there is still a lack of original standards for Korean chicken population characterization, and their link to the traditional chickens of other regions remains to be elucidated. Mitochondrial DNA (mtDNA) has a circular double-helical structure that has little to no recombination potential due to its nuclear DNA-independent, maternal inheritance properties (Clayton, 1982; Mindell et al, 1997; Delport et al, 2002). The nucleotide sequence in the mitochondrial D-loop area is one of the most essential and powerful molecular tools to track genetic information on old breeds of chicken, highlighting lineage incidence relationships, genetic distance, and variability within and between groups (Nishibori et al, 2005).
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