For the tropical adaptation of temperate japonica rice, given that it delays the heading date, which can be essential for prolonging the vegetative state and reaching optimum biomass, an elevated spikelet number, and also a higher grain-filling capacity. 3. Breakthrough in Yield together with the New Variety, Japonica 7 The initial japonica varieties created below the GUVA project clearly underperformed with respect for the indica group when it comes to yield and stability below the tropical atmosphere when compared with current leading indica varieties. Around the contrary, the yields in the most current assortment, Japonica 7, were observed to become related to or higher than these of high-yielding indica varieties which include NSIC Rc 222 and NSIC Rc 238 in the field trials at IRRI (14.2 N, 121.two E) and Philippine Rice Research Institute (15.three N, 121.0 E) within the 2021 dry season (Table 4).Table four. Yields of temperate japonica rice varieties developed under the GUVA project and major indica varieties in the 2021 dry season. Yield (Rough Rice) PhilRice-CES Ton/Ha 79 90 79 104 103 one hundred one hundred 5.eight 5.three 5.6 six.0 8.eight 8.0 6.three 1.three 73 66 70 75 110 100 79 -Variety Ton/Ha MS 11 Japonica 1 Japonica two Japonica 6 Japonica 7 NSIC Rc 222 (indica) NSIC Rc 238 (indica) LSD (0.05) five.four six.1 5.4 7.1 7.0 6.8 six.eight 0.IRRI Central Experiment Station, Philippine Rice Analysis Institute located in Nueva Ecija, Philippines; Relative yield level when the yield of NSIC Rc 222 is regarded as as 100 ; NSIC Rc 222 and NSIC Rc 238 are the top varieties inside the Philippines; Least important difference.Japonica 7 also showed intermediate reactions or resistance to