Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Expression of Organogenesis-related Genes and Analysis of Genetic Stability by ISSR Markers of Regenerants Derived from the Process of in vitro Organogenesis in Japanese Blood Grass (Imperata cylindrica 'Rubra')

기내배양 홍띠 단계별 재분화체의 기관분화 관련 유전자 발현과 ISSR에 기반한 유전적 안정성 분석

  • Ye-Jin Lee (Department of Plant Production Sciences, Graduate School of Sunchon National University) ;
  • In-Jin Kang (Department of Plant Production Sciences, Graduate School of Sunchon National University) ;
  • Chang-Hyu Bae (Department of Plant Production Sciences, Graduate School of Sunchon National University)
  • 이예진 (순천대학교 대학원 식물생산과학부) ;
  • 강인진 (순천대학교 대학원 식물생산과학부) ;
  • 배창휴 (순천대학교 대학원 식물생산과학부)
  • Received : 2023.06.07
  • Accepted : 2023.08.31
  • Published : 2023.10.01
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Abstract

The in vitro organogenesis is one of important issues in plant embryology, and somaclonal variations are existing in calli and/or regenerants induced from a process of the organogenesis with in vitro circumstances. In this study, expressions of organogenesis-related genes were evaluated and genetic stability of regenerants derived from the process of in vitro organogenesis were measured using ISSR markers in Imperata cylindrica 'Rubra', Poaceae. The expressions of organogenesis-related genes were detected all of regenerants at the process of the organogenesis. All ISSR markers produced with an average of 71 bands per in vitro-cultured regenerants, and the scorable bands were varied from two to eight with an average of 5.14 bands per a primer. The polymorphism rates of the in vitro regenerants were higher than that of mother plants (1.4%), showing 4.1% (pot-cultured regenerants), 4.3% (field-cultured regenerants), 4.2% (in vitro-cultured regenerants), 5.6% (calli with green shoots) and 1.4% (calli), respectively. The genetic similarity matrix (GSM) among all accessions ranged from 0.747 to 1.0 with a mean of 0.868. GSM of the regenerants showed differences (from 0.972 to 1.00) compared with that of mother plants (0.991). According to the clustering analysis, two independent groups were divided into; the one is mother plants and regenerants cultured at room and open field, the other is regenerants cultured in vitro. The results give a new insight for understanding the dynamics of organogenesis in monocot plant.

화본과 식물 홍띠(Imperata cylindrica 'Rubra')의 기관분화 관련 유전자의 동태와 기내재생체의 유전적 안정성을 조사하고자 기관분화 단계별 재분화체를 작성하여 기관분화 관련 유전자 발현과 ISSR 마커 기반 변이성을 조사하였다. 5종류 총 15개체의 기관분화 단계별 재분화체에서 캘러스 발생 유전자인 FIE는 모식물체 1번을 제외한 14개의 식물체에서 모두 발현되었으며, 뿌리 발생 유전자인 WOX11도 15개의 모든 단계별 재분화체에서 발현하였다. 체세포 발생 유전자인 LEC1B는 15개 식물체에서 모두 발현하였으나 비교적 약하게 발현하였다. 7종류 총 21개체의 기관분화 단계별 재분화체 및 재분화식물체에 대하여 ISSR 분석한 결과, 유전적 다형성은 기관분화 단계별 재분화체 및 순화 재분화체(실내포트 재배식물체 4.1%, 노지 재배식물체 4.3%, 기내배양 홍띠(적색)식물체 4.2%, 녹색신초 발생 캘러스 5.6%, 캘러스 1.4%)에서 대조구인 모식물체(1.4%)와 같거나 높게 나타났다. 또한, 유전적 유사도 지수는 0.747~1.0 사이에 분포하며, 평균 0.868로 나타났다. 군집분석 결과 유전적 유사도 지수 0.809에서 기외 식물체(모식물체, 실내재배 및 노지재배 재분화 녹색 식물체)와 기내식물체 및 재분화 과정상의 분화체(기내배양 중인 홍띠 식물체, 녹색 신초, 적색신초 발생 캘러스, 캘러스)는 독립적인 2개 그룹으로 유집되었다. 이상의 결과는 화본과 식물의 기내배양 시 재분화 과정에서 일어나는 일련의 유전학적 기초자료를 제공해 준다.

Keywords

Acknowledgement

이 논문은 2020년 순천대학교 학술연구비(과제번호: 2020-0202)공모과제로 연구되었음.

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