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Identification of White Hanwoo Breed Using Single Nucleotide Polymorphism Markers

단일염기다형성 마커를 이용한 백우 품종 식별 방법

  • Kim, Seungchang (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Kwanwoo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Roh, Heejong (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Dongkyo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Sungwoo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Kim, Chalan (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Lee, Sanghoon (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Ko, Yeounggyu (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA) ;
  • Cho, Changyeon (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
  • 김승창 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 김관우 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 노희종 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 김동교 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 김성우 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 김찬란 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 이상훈 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 고응규 (농촌진흥청 국립축산과학원 가축유전자원센터) ;
  • 조창연 (농촌진흥청 국립축산과학원 가축유전자원센터)
  • Received : 2019.12.04
  • Accepted : 2020.01.03
  • Published : 2020.01.31
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Abstract

This study was conducted to develop specific Single Nucleotide Polymorphism (SNP) markers to identify the genetic characteristics and breed of White Hanwoo (WH) using a molecular biological method. SNP genotyping was performed with an Illumina Bovine HD 777K SNP chip using DNA extracted from 48 Hanwoo and 22 WH. The minor allele frequency (MAF) difference of each SNP was calculated and the statistical significance (P-value) of the MAF difference was calculated through Fisher's Exact test (Genotype). SNPs with 100% difference in the MAF difference were selected based on marker selection criteria. The nine SNP markers with genetic differences were selected. The selected markers have different alleles as being Hanwoo- and WH- specific. Therefore, based on these results, it can be concluded that the Hanwoo and WH varieties can be clearly distinguished by using these SNPs. So, the patent of the WH breed identification markers was registered. WH is a breed that shows the characteristics of a Korean native species that is separate from the native Hanwoo. It is expected that genetic characteristics research on the WH can be used to identify the breed and as a knowledge base for enhancing the value of breeding stock.

본 연구는 백우 품종 육성을 위해 분자생물학적 방법을 이용하여 유전적 특성을 파악하고 백우 품종을 식별하기 위한 백우 품종 특이적인 Single Nucleotide Polymorphism (SNP) 마커를 개발하기 위해 수행되었다. 한우 48두와 백우 22두의 혈액에서 추출된 DNA를 이용하여 Illumina Bovine HD 777K SNP chip으로 SNP genotyping을 실시하였다. 각 SNP의 Minor Allele Frequency (MAF) difference (한우와 백우의 차이 절대값)을 계산하고, Fisher's Exact test (Genotype)을 통해 MAF difference의 통계적 유의성(P-value)을 계산하였다. 품종 별 차이를 나타낼 수 있는 마커를 선발기준으로 MAF difference가 100%의 차이를 나타내는 SNP를 식별하였다. 이러한 유전적 차이를 보이는 9개의 단일염기다형성 마커(rs42125585, rs42125591, rs42125833, rs109461720, rs134735704, rs109447299, rs42164846, rs42160000 및 rs137353829)가 선발되었다. 선발된 마커들은 한우와 백우 특이적인 대립유전자를 가지고 서로 다른 대립유전자를 나타내고 있다. 이들 9개의 SNP 마커들을 이용하여 한우와 백우의 품종을 식별할 수 있음을 확인하였고, 이러한 결과들을 바탕으로 백우 품종 식별 마커 특허를 등록하였다. 백우는 원종인 한우에서 분리되어 한국재래종의 특성을 잘 나타내 주는 계통으로, 이러한 백우가 가지고 있는 유전적 특성 연구는 백우를 식별하고 품종으로서 육종하는데 사용되어 종축으로서의 가치 증진을 위한 기반 연구가 될 것으로 생각된다.

Keywords

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