Local adaptability tests of promising inbred rice lines under Isabela [Philippines] condition
2017
Gawat, N.R. | Pasicolan, H.R. | Padolina, T.F.
Isabela is one of the major rice granaries in the Philippines. The physical area for irrigated rice land is 161,723 hectares (PAS, 2015). Average yield in Isabela is 4.48 t/ha (PAS, 2014) which is slightly greater than the national average of 4.28 t/ha (PhilRice Statistics 2002). Farmers in Isabela grow several varieties of inbred rice every season. Hence, there is a need to continuously evaluate promising inbreds in order to come up with a location specific varietal recommendation. The trial was established under direct seeded and transplanted rice culture at PhilRice-Isabela during the 2016 dry and wet seasons following the randomized complete block design with three replications. Promising entries were evaluated in terms of yield potential, agronomic characteristics and resistance to pests and diseases. During the dry season of the direct seeded rice culture, IR82572-28-3-1-1-2 (8615.50 kg/ha) significantly out yielded all the test entries with a yield difference of 405.8 to 1,811.87 kg/ha. During WS, PR 37951-3b-37-1-2 (7316.06) kg/ha, and PR 37704-2b-6-1-2-1-2 (7241.79 kg/ha), obtained the highest yield. In the transplanted rice culture, PR 37921-B-3-2-2 was the top yielder with 8382.20 kg/ha and, 8628.71 kg/ha for dry and wet season. IR82572-28-3-1-1-2, PR37951-3b-37-1-2, PR37704-2b-6-1-2-1-2 and PR37921-B-3-2-2, performed well for both direct seeded and transplanted rice culture in San Mateo, Isabela. These data will be used to supplement NCT evaluation for possible release of these promising inbred lines.
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