Climatic data of experiment in the greenhouse at Montpellier (France) in 2012 (GH1) and 2013(GH2), and in the field at IRRI (Philippines) in 2013. Mean day or night temperature stand for the average daily temperature of day or night. Minimum temperature stands for daily minimum temperature. Increased night temperature was imposed from33 days after transplanting (GH1 and GH2) to maturity (to mid-grain filling stage for Hybrid1 in the field). Mean value ± SD.