Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Use of Microsatellite Markers to Identify Commercial Melon Cultivars and for Hybrid Seed Purity Testing

Microsatellite Marker를 이용한 멜론 시판품종의 품종식별과 F1 순도검정

  • Kwon, Yong-Sham (Department of Genetic Engineering, College of Natural Resources and Life Science, Dong-A University) ;
  • Hong, Jee-Hwa (Variety Testing Division, Korea Seed and Variety Service, Ministry for Agriculture, Food and Rural Affairs)
  • 권용삼 (동아대학교 생명자원과학대학 유전공학과) ;
  • 홍지화 (농림축산식품부 국립종자원 재배시험과)
  • Received : 2013.12.20
  • Accepted : 2014.04.29
  • Published : 2014.09.30
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Abstract

Microsatellite markers were used to identify 58 major commercial melon cultivars, and to assess hybrid seed purity of a melon breeding line known as '10H08'. A set of 412 microsatellite primer pairs were utilized for fingerprinting of the melon cultivars. Twenty-nine markers showed hyper-variability and could discriminate all cultivars on the basis of marker genotypes, representing the genetic variation within varietal groups. Cluster analysis based on Jaccard's distance coefficients using the UPGMA algorithm categorized 2 major groups, which were in accordance to morphological traits. The DNA bulks of female and male parents of breeding line '10H08' were tested with 29 primer pairs based on microsatellites to investigate purity testing of $F_1$ hybrid seeds, and 5 primer pairs exhibited polymorphism. One microsatellite primer pair (CMGAN12) produced unambiguous polymorphic bands among the parents. Among 192 seeds tested with CMGAN12, progeny possibly generated by self-pollination of the female parent were clearly distinguished from the hybrid progeny. These markers will be useful for fingerprinting melon cultivars and can help private seed companies to improve melon seed purity.

Microsatellite 표지를 이용하여 국내에서 시판되고 있는 멜론 58품종의 식별과 멜론 육종 계통 '10H08'을 이용하여 $F_1$ 종자 순도를 평가하였다. 412개의 microsatellite 표지 중 다형성 정도가 높은 29개는 품종 그룹 내에서도 다양한 유전 변이를 나타내었으며 분자표지의 유전자형에 의해 모든 품종을 식별할 수 있었다. Microsatellite 표지의 대립유전자를 이용하여 멜론 58품종에 대한 계통도를 작성하였을 때 멜론의 형태적 특성과 일치하면서 2개의 대그룹으로 구분되었다. $F_1$ 종자의 순도 검정에 microsatellite 표지를 활용하기 위하여 29개의 표지를 '10H08' 계통의 양친에 대하여 검정하였을 때 5개의 프라이머가 다형성을 보였으며, 이 중 한 개의 프라이머 'CMGAN12'는 양친간에 뚜렷한 다형성 밴드를 나타내었다. 이 프라이머를 192개의 $F_1$ 종자에 대하여 검정하였을 때 자식주로 보이는 개체가 분석된 종자 내에서 명확하게 구분되었다. 본 연구 결과에서 선정된 멜론 품종 식별용 microsatellite 표지는 멜론 품종의 지문화뿐만 아니라 $F_1$ 종자의 순도 검정이 가능하여 종자회사에서 매우 유용하게 활용될 수 있는 것으로 나타났다.

Keywords

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