식물병연구 (Research in Plant Disease)

한국식물병리학회 (The Korean Society of Plant Pathology)
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국내 감귤류에 발생한Citrus vein enation virus 분포조사

Incidence of Citrus vein enation virus in Citrus spp. and Poncirus trifoliata in Korea

  • 투고 : 2019.12.03
  • 심사 : 2019.12.18
  • 발행 : 2019.12.31
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초록

2017년, 감귤류에 Citrus vein enation virus (CVEV)의 발생보고가 있었다. 식물방역법상 관리급 병원체인 CVEV에 대한 검역조치를 위해 감귤의 주요 재배지인 제주도를 포함한 4개도 29개 시군에서 온주밀감, 유자, 만숙성 감귤류(한라봉, 천혜향, 레드향, 황금향) 재배과원 등 203개소에서 시료를 수집하고 reverse transcription polymerase chain reaction (RT-PCR) 방법과 시퀀싱을 통해 진단하였다. 진단결과, 양성반응을 보인 시료를 대상으로 외피단백질 유전자 부위를 분석하기 위해 GenBank에 등록된 분리주들과의 염기서열과 아미노산 서열을 비교한 결과, 98% 이상의 매우 높은 상동성을 확인하였다. 전체 시료에 대하여 RT-PCR 진단 결과, 136개 과원(67%)에서 CVEV가 검출되었으며, 유자 과원의 85.4%, 온주밀감 과원의 77.8%가 CVEV에 감염된 것으로 파악됐다. 또한, 감귤의 주요 재배지인 제주도에서 90.6%의 과원이 CVEV에 감염된 것으로 확인하였다. 기주별·지역별 발생실태 조사를 토대로 국내 감귤류에 CVEV가 만연되어 있음을 확인하였다. 본 연구를 바탕으로, CVEV의 발생실태 조사와 검역병원체 여부를 검토하여 2018년 5월 CVEV를 비검역 병원체로 변경하였다.

Citrus vein enation virus (CVEV), which was regulated as a quarantine virus in Korea, was firstly found on Jeju Island in 2017. In February 2018, a survey was carried out to determine the distribution of CVEV in the main commercial areas growing Citrus spp. and Poncirus trifoliata. The survey was performed at 203 groves in the southern Korean Peninsula and Jeju Island. CVEV infection was determined by reverse transcription polymerase chain reaction detection and sequencing. The coat protein (CP) gene sequences obtained from the CVEV-infected samples showed high similarities (more than 98%) to the previously reported CVEV CP sequences. In summary, CVEV was detected in 136 groves (67%), in which 85.4% of Citrus junos and 77.8% of Citrus unshiu were infected by CVEV. In Jeju Island, the infection rate of CVEV was relatively higher (90.6%). Our result revealed that CVEV has spread widely in Citrus and Poncirus in Korea. Based on the result, the Korean quarantine agency decide to exclude CVEV from quarantine in Korea.

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참고문헌

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