Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Characterization of Phenotypic Traits and Application of Fruit Flesh Color Marker in Melon (Cucumis melo L.) Accessions

멜론 유전자원의 생육 평가와 과육색 유전형 분석

  • 배익현 (농업회사법인 동오시드 주식회사) ;
  • 강한솔 (농업회사법인 동오시드 주식회사) ;
  • 정우진 (농업회사법인 동오시드 주식회사) ;
  • 유재황 (농업회사법인 동오시드 주식회사) ;
  • 이오흠 (농업회사법인 동오시드 주식회사) ;
  • 정희 (농업회사법인 동오시드 주식회사)
  • Received : 2021.06.15
  • Accepted : 2021.09.29
  • Published : 2021.10.01
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Abstract

We aimed to generate basic breeding data for melon (Cucumis melo L.). A total of 219 melon accessions conserved at the National Agrobiodiversity Center (NAC) in Rural Development Administration (RDA) were used in this study, of which 72 (33%) were collected from India. The majority of accessions showed orange (42%) and white (36%) flesh color. In addition to phenotypic evaluations, the accessions were genotyped using a molecular marker for the carotenoid biosynthesis gene CmOr. DNA fragments of the expected size were amplified in 205 out of 219 accessions. Digestion of the PCR products with HinfI restriction endonuclease showed 100% concordance between phenotype and genotype in green-fleshed accessions, but 98%, 97%, and 80% concordance in orange-, white-, and creamy-fleshed accessions, respectively. Sequence analysis revealed single nucleotide changes in the three positions of SNP1, SNP2 and SNP1int in the CmOr gene among accessions. These newly found alleles suggest that there are multiple mechanisms in determining fruit flesh color in melon. Also, the phenotype data of diverse accessions obtained in this study will be a valuable source for melon breeding.

멜론은 세계 각지에서 재배되는 경제적으로 중요한 작물중의 하나이다. 본 연구는 농업유전자원센터에서 수집 보관중인 멜론 유전자원을 대상으로 다양한 생육 특성을 특성을 조사하고, 멜론의 중요한 육종 형질중의 하나인 과육색의 유전형과 표현형을 조사하여 멜론 육종에 필요한 육종 재료 확보를 위한 기초 자료를 마련하고자 수행되었다. 총 219개의 멜론 유전자원을 대상으로 19개의 생육 특성과 PCA분석을 수행하고, 멜론의 중요한 육종 형질중의 하나인 과육색의 유전형을 조사하여 표현형과 비교하였다. 과육색은 오렌지색, 백색, 녹색, 유백색, 황색의 5가지로 분류하였으며, 이중 오렌지색이 87개로 가장 많았으며, 그 다음으로 백색이 75개였다. 그리고, 오렌지색과 녹색 과육 구별용 마커를 적용한 결과, 녹색 과육 21개의 경우는 표현형과 유전형 일치율이 100%였으며, 오렌지색의 경우는 98%, 백색은 97%, 유백색의 경우는 80%의 일치율을 보였다. 표현형과 유전형이 일치하는 않는 총 8개 유전자원의 염기서열을 분석한 결과, 3곳의 위치에서 단일염기다형성(SNP; single nucleotide polymorphism)이 있었다. 이러한 결과는 멜론의 과육색을 결정하는 아직 알려지지 않은 유전기작이 존재한다는 것을 제시하였으며, 본 연구에서 얻어진 다양한 유전자원의 생육조사 결과는 멜론 육종에 유용하게 쓰일 것으로 생각된다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 농업과학기반기술개발사업(과제 번호: PJ015067)의 지원에 의해 이루어졌음.

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