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초록
AI-Helper 아이콘AI-Helper

한발은 환경 스트레스에 미치는 자연재해로서, 장기간에 걸쳐 강수량 및 수분공급이 저하되면 수분이 결핍되어 작물이 정상적인 생리활동을 할 수 없고, 생육 또한 불량하여 수량감소에 큰 영향을 미친다. 모든 작물들이 한발의 영향을 크게 받지만 어느 생육 단계에서 한발 스트레스를 받느냐에 따라서 피해가 달라진다. 일반적으로 옥수수는 한발 스트레스를 받으면 유묘기 형성, 영양 생장, 뿌리 발달, 광합성, 개화기, ASI, 종실 형성, 수량 등에 심각한 영향을 미치게 된다. 특히 영양생장에서 생식생장으로 전환되는 단계에 한발 스트헤스를 받으면 수꽃 및 화분 방출이 늦어지고, 출사기 및 옥수수 수염 발생도 늦어져 ASI가 증가하여 수정이 불가능 하거나 수정이 되더라도 배 발생 억제 및 방해를 받아 수량 감소의 큰 원인이 된다. 이러한 한발에 대한 피해를 줄이기 위해서 1980년대부터 최근까지 마커와 표현형이 연관된 유전체를 바탕으로 다량의 분자적 데이터 분석을 통한 옥수수 한발 내성 품종 선별 및 육종에 대한 많은 연구들이 진행되고 있다. 또한 최근에는 수량 등 다양한 유전자들이 관여하고 환경 스트레스에 영향을 받는 양적형질 QTL에 관한 많은 연구들이 수행되고 있으며, genomics 분야에서 신기술인 MAS를 이용하여 목표유전자 이입 및 선발을 통해 또 다른 육종 선발 도구로 활용되고 있다. 뿐만 아니라 유전자 조작기술을 이용한 한발 내성 특징을 가진 옥수수를 개발하여 제품으로 생산 및 판매되고 있다. 과거 전통적인 육종 방법은 자식계통의 표현형 분석과 특별 조합을 통한 계통으로부터 데이터를 분석하여 품종을 육성하였으나, 현재는 모든 작물의 유전체 전체를 이용한 데이터 베이스와 분자 마커 기술을 한발 내성 육종에 활용하여 다양한 연구가 이루어지고 있다. 이러한 분자적 육종 기술의 발달은 우수한 연구 결과를 도출 및 확보할 수 있으며, 옥수수 한발 내성 신품종 개발에 있어서 새로운 육종 기술로 적용할 수 있을 것이다.

Abstract AI-Helper 아이콘AI-Helper

Drought stress has detrimental effects on the seedling development, vegetative/ reproductive growth, photosynthesis, root proliferation, anthesis, anthesis-silking interval (ASI), pollination and grain yield in maize. Typically, two weeks before silking through pollination are an important time in m...

주제어

AI 본문요약
AI-Helper 아이콘 AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

  • 본 논문에서는 가뭄 및 수분 부족으로 인하여 발생되는 옥수수 한발 관련 연구에 대하여 알아보고, 또한 한발에 대한 생리적 및 분자적 접근분석과 유전체 기술을 활용한 옥수수 연구 현황에 대한 정보를 제공하고자 한다.
본문요약 정보가 도움이 되었나요?

질의응답

핵심어 질문 논문에서 추출한 답변
옥수수란? 옥수수(Zea mays L.)는 일반적으로 생육기간 동안 따뜻한 온도 및 기후 조건을 필요로 하는 식량작물이다. 옥수수는 식량과 사료용 외에도 각종 산업 및 공업용, 특히 바이오 에너지의 원료로서 많이 이용되고 있다(Chen et al.
옥수수를 이용하는 산업 분야는? )는 일반적으로 생육기간 동안 따뜻한 온도 및 기후 조건을 필요로 하는 식량작물이다. 옥수수는 식량과 사료용 외에도 각종 산업 및 공업용, 특히 바이오 에너지의 원료로서 많이 이용되고 있다(Chen et al., 2013; Vohra et al.
한발이 옥수수의 생육에 미치는 영향은? 옥수수는 수분 부족으로 한발 스트레스를 받으면 유묘기 형성, 초기영양생장, 광합성능력, 생식생장, 유수형성, 수정, 종실 형성 및 수량 등에 상당한 영향을 미치게 된다(Aslam et al., 2013). 옥수수 잎 발달이 저해되면 잎 면적이 감소하여 광합성 효율이 떨어지며, 유수형성기 이후에 한발 스트레스를 받으면 암이삭이 수꽃보다 늦게 발달하여 수분이 어려워 불임이삭이 발생한다. 또한 한발 스트레스로 인한 고온현상은 수꽃의 개화 유도를 방해하며, 꽃가루 발달을 저해하는 요인으로 나타날 수있다(Herrero and Johnson, 1981).
질의응답 정보가 도움이 되었나요?

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