한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

  • 제60권1호
  • /
  • Pages.8-16
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  • 2015
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  • 0252-9777(pISSN)
  • /
  • 2287-8432(eISSN)
한국작물학회 (The Korean Society of Crop Science)
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옥수수 유묘기 잎말림에 따른 한발 내성 평가

Evaluation of Drought Tolerance in Maize Seedling using Leaf Rolling

  • 송기태 (동국대학교 생명과학과) ;
  • 김경희 (동국대학교 생명과학과) ;
  • 김효철 (동국대학교 생명과학과) ;
  • 문준철 (강원대학교 농업생명과학연구원) ;
  • 김재윤 (고려대학교 생명과학대학 생명공학부) ;
  • 백성범 (국립식량과학원 전작과) ;
  • 권영업 (국립식량과학원 전작과) ;
  • 이병무 (동국대학교 생명과학과)
  • 투고 : 2014.11.10
  • 심사 : 2015.01.25
  • 발행 : 2015.03.31
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초록

본 연구는 국내 및 해외 유전자원을 이용하여 옥수수 유묘기의 한발 내성 평가를 수행하였다. 1. 약한 한발 환경에서는 장다옥과 청다옥을 제외한 모든 품종에서 2, 3엽의 잎말림 현상을 찾아볼 수 없었다. 장다옥과 청다옥은 첫 번째 잎의 잎말림 현상이 다른 품종에 비해 높게 나타났다. 동남아시아 품종인 DK9955에서도 첫 번째 잎의 잎말림 현상이 나타났으나, 장다옥과 청다옥에 비해 낮은 수준이었다. 2. 심한 한발 환경에서는 대부분의 품종들이 첫 번째 잎에서 3단계 이상의 잎말림 현상을 보였으며, 특히 한국 품종에서 잎말림 현상이 높게 나타났다. 또한, 동남아시아 품종 중 DK9955, Ki3, CML333에서도 첫 번째 잎의 잎말림 현상이 높게 나타났다. 2, 3엽에서는 한국 품종인 광평옥, 다평옥, 장다옥, 청다옥 등이 심한 잎말림을 보였으며, 한발 내성이 약하다고 보고된 Ki3와 B73도 두 번째 잎에서 높은 잎말림 현상이 나타났다. 3. 극심한 한발 환경에서는 모든 품종에서 첫 번째 잎의 잎말림 현상이 높게 나타났다. 대부분의 품종이 세 번째 잎에서는 잎말림 현상이 없었으나, CML247, 다평옥, 장다옥, 청다옥의 경우 3단계 이상의 잎말림이 나타났다. 한발 내성이 강한 것으로 알려져 있는 Ki11과 동남아시아 품종인 LVN10과 LVN99는 극심한 한발 수준에서도 상대적으로 낮은 잎말림 현상이 관찰되었다. 4. 잎말림 회복을 측정한 결과, 2단계 및 3단계의 경우 품종과 엽기에 관계없이 회복 가능하였으나, 4단계 이상의 잎말림 현상이 진행된 경우 회복이 불가하다는 것으로 확인하였다. 5. 종합적으로 토양수분함량 5~7%에서 두 번째와 세 번째 잎의 잎말림 평균이 2.5이하를 보이는 품종들은 유묘기 한발 내성이 강한 것으로 보인다.

The objective of this study was to evaluate the drought tolerance in maize seedling using leaf rolling. Nineteen maize resources, seven Nested Association Mapping parents lines, six Korean commercial cultivars, and six Southeast Asia commercial cultivars, were used to examine drought tolerance. The leaf rolling scores were measured on each leaf in three stress conditions with moderate drought (10%), severe drought (7%), and extreme drought (5%). Generally leaf rolling score of seedlings increased at the lower soil water potentials (5~7%). As a result, drought-tolerant cultivars showed lower leaf rolling score (below 2.5) than the drought sensitive cultivars (above 3.5). Nine varieties, NK4043, CML322, DK9955, NK4300, Ki11, DK8868, CML228, LVN99, and LVN10, have been selected for tolerance to drought stress. These results suggest that the leaf rolling score in maize seedling has been made available to indirect index for drought tolerance.

키워드

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  2. Identification of Candidate Transcripts Related to Drought Stress using Secondary Traits and qRT-PCR in Tropical Maize (Zea mays L.) vol.64, pp.4, 2019, https://doi.org/10.7740/kjcs.2019.64.4.432
  3. RNA-Seq Analysis of Gene Expression Changes Related to Delay of Flowering Time under Drought Stress in Tropical Maize vol.11, pp.9, 2015, https://doi.org/10.3390/app11094273
  4. ‘Arirang-2’: A Potato Variety Tolerant to Drought and Heat Stress vol.53, pp.4, 2021, https://doi.org/10.9787/kjbs.2021.53.4.482