Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
권호 표지

Trait Variation and Molecular Characterization of Ds insertional rice lines

벼 Ds 삽입변이 계통의 특성변이 및 분자생물학적 특성

  • Received : 2008.01.11
  • Published : 2008.03.10
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Abstract

The 1,874 rice lines were selected from 3,000 Ds insertional mutant pool by Basta herbicide treatment and were surveyed for trait variation and molecular characteristics of genes knocked out by Ds insertion. Compared with "Donjin", an original japonica cultivar used for transformation, Ds insertion mutant pool showed large variation in major agronomic traits including tiller, panicle, and heading etc. Southern blot analysis demonstrated that these lines on the average had two Ds copies in Donjin genome, resulting in 38.4% of one copy, 32.5% of two copies, 16.7% of three copies, and 11.3% of over four copies. GUS analysis showed that 3.9% of lines (73/1,860) had tissue-specific expression in leaves, nodal parts, floral organs such as stigma and pollen, and roots. Data set obtained from agricultural trait variation and molecular characteristics for individual Ds insertional lines would provide researchers with more information for understanding the function of unknown rice genes controlling economically important traits.

1. Ds 삽입변이체 계통으로부터 제초제 저항성 1,874계통을 선발하고 농업적 주요 특성으로서 출수일수, 간장, 수수, 수장, 엽장 등 5가지 형질에 대하여 조사한 바, 조사된 5가지 형질에 대하여 원품종인 동진벼에 비하여 매우 다양한 변이폭을 보여주었다. 2. 농업적 유용성과 관련된 수장이 길고, 조기출수, 수수가 많은 변이체 뿐만 아니라 형태학적 변이를 보이는 twin seedling, dwarf, early heading, strip albino, liguleless 등 변이체가 다수 발견됨으로서 육종적 이용 및 유전자 기능해석을 위한 유용한 집단으로서 유용성을 보여주었다. 3. 서던분석 결과 벼 게놈상에서 Ds는 평균 2 copy로 전이되었으며 조직부위별로 GUS의 발현을 조사한 결과 잎, 뿌리 및 화기관등에서 약 3.9%가 발현되었다. 이 삽입변이체에서 나타난 다양한 변이형질의 주요 농업적 특성과 GUS 발현의 재현성을 위해 다음 세대의 전개를 통한 후대분석이 필요하다.

Keywords

Acknowledgement

Supported by : 농업생명공학연구원

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