Physiological Nitrogen Use Efficiency and Agronomic Characters of Breeding Lines in Rice
2007
Cho, Y.I. (Seoul National University, Seoul, Republic of Korea) | Koh, H.J. (Seoul National University, Seoul, Republic of Korea), E-mail: [email protected]
This study was carried out to evaluate the variation of physiological nitrogen-use efficiency (PNUE: Grains yield/total nitrogen content of shoot) in rice under different nitrogen (N) fertilizer levels, and to investigate the relationship of PNUE with agronomic characters in order to obtain the basic information for developing high-PNUE lines. A total of 100 F∧8 recombinant inbred lines (RILs) derived from a cross between Dasanbyeo (tongil type rice, derived from an indica × japonica cross and similar to indica in its genetic make-up) and TR22183 (a Chinese japonica variety) were cultivated under ordinary (100 kgN/ha) and low (50 kgN/ha) N-fertilizer conditions in the experimental field.
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