Effects of Temperature and Day-Length on Heading Habit of Recently Developed Korean Rice Cultivars
2006
Choi, K.J. (National Institute of Crop Science, Suwon, Republic of Korea), E-mail: choikj@rda.go.kr | Lee, J.I. (National Institute of Crop Science, Suwon, Republic of Korea) | Chung, N.J. (Rural Development Administration, Suwon, Republic of Korea) | Yang, W.H. (National Institute of Crop Science, Suwon, Republic of Korea) | Shin, J.C. (National Institute of Crop Science, Suwon, Republic of Korea)
To understand the heading habit of recently developed 20 Korean rice cultivars, rice plants in a phytotron were exposed to different temperature: 22.5℃(day 27℃/night 18℃), 27.5℃(day 32℃/night 23℃), and day-length conditions: 10, 12, 13, 14, 15 hours. Four rice cultivars (Sobibyeo, Juanbyeo, Ilpumbyeo and Shindongjinbyeo) showed relatively short Basic Vegetative Phase(BVP) of 17 to 18 days, while Dasanbyeo showed the longest(35days) BVP, compared to other remaining 15 tested cultivars which exhibited 24 to 31 days of BVP.
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