옥수수 유묘기 잎말림에 따른 한발 내성 평가

• Published in: Korean journal of crop science Vol. 60; no. 1; pp. 8 - 16
• Main Authors: 송기태(Kitae Song), 김경희(Kyung-Hee Kim), 김효철(Hyo Chul Kim), 문준철(Jun-Cheol Moon), 김재윤(Jae Yoon Kim), 백성범(Seong-Bum Baek), 권영업(Young-Up Kwon), 이병무(Byung-Moo Lee)
• Format: Journal Article
• Language: Korean
• Published: Korean Society Of Crop Science 31.03.2015; 한국작물학회
• Subjects: 농학; drought tolerance; soil water content; maize; leaf rolling; seedling
• ISSN: 0252-9777; 2287-8432
• DOI: 10.7740/kjcs.2014.60.1.008

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.