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자료유형
학술저널
저자정보
현웅조 (농촌진흥청 국립식량과학원) 여상민 (농촌진흥청 국립식량과학원) 이상복 (농촌진흥청 국립식량과학원) 이정희 (농촌진흥청 국립식량과학원) 정종민 (농촌진흥청 국립식량과학원) 성열규 (농촌진흥청 국립식량과학원) 서대하 (농촌진흥청 국립식량과학원) 원용재 (농촌진흥청 국립식량과학원) 안억근 (농촌진흥청 국립식량과학원) 이점호 (농촌진흥청 국립식량과학원) 문준철 (강원대학교) 장철성 (강원대학교)
저널정보
한국육종학회 Plant Breeding and Biotechnology Plant Breeding and Biotechnology Vol.4 No.2
발행연도
2016.1
수록면
176 - 187 (12page)

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Low temperature stress at the seedling stage of rice is an important factor causing the leaf discoloration, wilting and consequently leads to non-uniform crop maturation. In order to screen the cold tolerance elite lines efficiently, the five cold treatment conditions with different water and air temperature were designed and treated at seedling stage. For the evaluation of seedling tolerance, the injury was scored by visual rate and measured by Soil and Plant Analyzer Development (SPAD) meter. In the reactions of varieties for each treatment, the treatment ‘B’ condition, 12℃ mean water with 24℃ mean air, shows clear discoloration, so it’s correlation coefficient was highest (r=−0.9, P<0.0001) among the treatments. In the treatment condition for screening the cold-tolerance elite line, the cultivar, treatment and their interaction significantly affect the SPAD value. The ‘A’ treatment, 12℃ mean water with 34℃ mean air, was the best way to observe the variation between the elite lines. On the basis of the Duncan’s test for SPAD value of cultivars, Keumo (moderate tolerant), Saetbyeol (sensitive) and Seolak (tolerant) were selected as check varieties. To study its impacts at the paddy field, the changes of crop characteristics such as height, panicle length, number of tiller and heading were investigated. In later growth period, the seedling treatment impact at the paddy field leads to heading delay. Due to the low temperature stress at the seedling stage induced by 12℃ mean cold water, Japonica and Tongil group shows the heading delay 4 to 7 and 8 to 11 days respectively.

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