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Morphological Characteristics of the Rice (Oryza sativa L.) with Red Pigmentation

적색종피 돌연변이 벼의 형질특성조사

  • Matin, Mohammad Nurul (Department of Biotechnology, School of Biotechnology, Yeungnam University) ;
  • Kang, Sang-Gu (Department of Biotechnology, School of Biotechnology, Yeungnam University)
  • 모하마드 누룰 마틴 (영남대학교 생명공학부 생명공학 분자유전학연구실) ;
  • 강상구 (영남대학교 생명공학부 생명공학 분자유전학연구실)
  • Published : 2010.01.30

Abstract

Seven rice germplasms with red pigmentation within the pericarp were isolated from a large mutant collection. These red pericarp phenotypes resulted from the functions of the Rc, Rd and RdRc genes. Among them, two brown pericarp of the Rc type, four red pericarp of the RdRc type, and one white pericarp of the Rd type were identified. Morphological and agronomic characteristics of those rice germplasms were studied. The Rc type germplasms have the faint red or brown color pericarp and the Rd types produce the white pericarp, whereas the RdRc type germplasms have the dark red pericarp. Most of the important agronomic characteristics including plant stature, tillering ability, spikelet fertility, and total grain yield were lower in the colored rice than those of the wild-type control. All of the studied colored rice germplasms had a tendency of easy seed-shattering in comparison to the control. These characteristics of newly identified germplasms will be useful for identifying the genes responsible for pericarp color phenotype determination.

벼의 적색 종피 표현형질은 Rc 혹은 Rd 그리고 RdRc 두 개의 복수유전자에 의하여 결정된다. 본 연구에서는 종피에 색소가 있는 돌연변이 벼 7계통을 벼 표현형 돌연변이 군들로부터 분리하였다. 이들 종피색의 돌연변이 형질을 조사한 결과 두 개의 변이체가 갈색의 종피형질을 가졌으며 네 개의 변이체가 적색의 종피형질을 가졌다. 그리고 한 개의 변이체는 종피에 색깔이 없었다. 수확 후 종자의 종피색 표현형질에 관한 정밀조사를 실시한 결과 두개의 갈색종피 돌변이체는 Rc 유전자형 이었으며 네개의 적색종피 돌변이체는 RdRc 유전자형이었다. 또한 종피에 색깔이 없는 한 개의 돌변이체가 Rd 유전자형이었다. 이들 중 동일한 종피색깔을 나타내는 돌연변이 개체들이 단일 돌연변이 개체의 후손인지 여부를 판명하기 위하여 돌변이체들의 초형과 농업형질을 조사한 결과 동일 종피색 돌변이체들의 형질이 서로 상이하므로 각각 서로 다른 돌연변이 계통들로 확인되었다. 그리고 이들 종피색깔 돌연변이들은 초형, 분얼 특징, 임성과 수량성 등을 포함한 농업형질들이 정상 벼의 농업형질들보다 대체로 빈약하고 또한 높은 탈립성을 보였다. 이러한 종피색과 관련된 돌연변이 벼 유전자원은 안토시아닌과 폴리페놀이 풍부하므로 병충해 저항성 품종과 환경스트레스 내성 품종의 육종에 필요할 뿐만 아니라 종피의 색깔을 결정하는 유전자들의 기능을 밝히는 데 중요한 자료로 사용될 것이다.

Keywords

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