Adaptability tests of promising quality rice lines under Ilocos [Philippines] conditions
2002
Alquiza, R.C. | Castro, B.C. | Vicente, B.R. | Baysac, F.S. | Ildefonso, L.A. | Tumbaga, R.T. | Liboon, S.P. (Philippines Rice Research Inst., Batac 2906, Ilocos Norte (Philippines))Sebastian, L.S. | Obien, S.R.
The Philippine Rice Research Inst. station. evaluated six quality rice lines, under Ilocos conditions. The different lines (PJ3-1, PJ3-5, PJ7, PJ 17, PJ(t)4 and PJ(g)6, which are progenies from the cross between japonica and indica rices were evaluated in 2000 to 2001, under irrigated and rainfed ecosystems. Among the six lines, four lines (PJ3-1, 3-5, 7 & 17) matured earlier, 110-117 days after sowing (DAS) which are suited in the rainfed areas of the Ilocos. PJ(T)4, a tungro resistant line, matured at 134 to 139 (DAS) while PJ(g)6, a glutinous line, matured at 128-137 DAS. Those two lines are suited for rainfed lowland conditions. In DS [dry season] 2000, PJ3-1, 3-5,7 and 17 were shorter as compared to PJ(T) 4) and PJ(g)6. However, during the wet season, the lines were taller, 103 cm to 116 cm, under the rainfed and irrigated conditions. PJ(g)6 and PJ(T)4 grew as tall as 121-126cm. Despite their height, the lines were all resistant to lodging. The number of productive tillers was 14-20. The yield obtained during the dry season ranged from 4.2-6.4t/ha. Higher yields of 6.0 to 7.1 t/ha were produced in the rainfed areas during WS [wet seasson] 2001. The terms of eating quality, PJ3-5, PJ7 and PJ17 were preferred since they resemble the quality of IR64, the leading rice variety in the Philippines
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