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RAPD-SCAR Markers Linked to Medium-Leaf Zoysiagrass Ecotypes

한국잔디 중지 변이개체와 연관된 RAPD-SCAR 마커

  • Received : 2013.06.06
  • Accepted : 2013.06.17
  • Published : 2013.06.30

Abstract

Two medium-leaf ecotypes (CY6069, CY6097) belonging to one species (Zoysia japonica) of Korean lawngrasses were selected in sod production fields in Jang Seong, Korea. They were reported to have distinct morphological and growth rate characteristics different from the preferred medium-leaf type zoysiagrass in Korea. This study was conducted to define further the genotypic difference at the molecular level and to develop DNA marker based on the specific DNA fragment. Polymorphic DNA fragments were first explored by using randomly amplified polymorphic DNA (RAPD) primers, which were then converted into PCR-based sequence characterized amplified region (SCAR) markers. The CY6069-specific primer set amplified about 550 bp successfully, while the CY6097 marker produced the expected 690 bp band, by which those markers were nominated by CY6069_550 and CY6069_690 SCARs, respectively. Together with the reported morphological and other phenotypic features, the SCAR markers confirmed in this study will be useful to identify those medium-leaf zoysiagrass genotypes when they are cultivated with other vegetatively propagated warm-season turfgrasses in sod farms.

한국 잔디 신품종 개발 목적으로 전라남도 장성군 삼서면 일대 한국잔디 중지류 생산포장에서 선발한 생육 및 피복속도가 빠르고 밀도 또는 가을철 녹색기간이 긴 2개 우량계통을 대상으로 DNA 수준에서 기존 중지류 또는 한국잔디들과 차이를 살펴보고 신품종 특이적으로 차이를 보이는 DNA 염기서열을 기반으로 RAPD-SCAR 마커를 개발하고자 본 연구를 실시하였다. RAPD 프라이머를 스크리닝 한 결과 N8021와 N8001 프라이머가 CY6069와 CY6097 품종 각각에 특이적인 DNA 절편을 약 600 bp와 700 bp 부근에서 발견할 수 있었다. 특이 밴드는 TA-cloning vector에 삽입 후 대장균에 형질전환하여 배양하였고, 이로부터 추출된 플라스미드 DNA의 염기서열 분석을 실시하여 최종적으로 중지류 신품종 특이 SCAR 마커 프라이머를 작성하였다. CY6069 선발 품종 특이 SCAR 마커(CY6069_550)는 다른 한국잔디 들잔디(야지), 한국잔디 중지, 갯잔디, 금잔디에서는 보이지 나타나지 않았던 식별 가능한 밴드를 보였고(550 bp), CY6097 선발 품종 식별을 위한 SCAR 마커(CNU70-6_1500)도 CY6097 계통에서만 특이적으로 나타나는 DNA 밴드를 약 700 bp 부근에서 증폭할 수 있었다. 형태 및 생육특성 차이와 함께 본 연구를 통해 개발된 RAPD-SCAR 마커를 활용하면 선발된 중지류 한국잔디 CY6069와 CY6097 계통을 실험실내에서 PCR을 통해 유전자원 식별 및 원산지 증명이 가능해졌고 영양번식을 통해 주로 번식하는 난지형 잔디 생산 포장에서 품종의 혼입으로부터 정확하게 분리해 낼 수 있을 것으로 판단된다.

Keywords

References

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