Grain quality characteristics of some popular Korean rice varieties grown under Philippine tropical climate
2012
Corpuz, H.M. | Ablaza, Ma.J.C. | Soco, O.C. | Corpuz, G.G. | Manigbas, N.L., Philippine Rice Research Inst., Maligaya, Science City at Muñoz, 3119 Nueva Ecija (Philippines)
Korean rice varieties command a premium price in other countries because of their excellent eating quality. However, these varieties are usually grown under temperate climate condition. This study was undertaken to evaluate the grain quality performance of some popular Korean rice varieties grown under Philippine tropical climate. The grain quality traits such as milling potentials, physical attributes, physicochemical and sensory characteristics of 12 Korean varieties grown in 2011 dry season (DS) were determined. Results showed that most varieties had good milling properties. Brown rice, total milled rice and head rice recoveries ranged from 76.7 to 80.6%, 72.9 to 75.7%, and 53.2 to 69.7%, respectively. Majority of the samples had short to medium grain length and intermediate and grain shape. Among the non-waxy samples, only six varieties passed the recommended value for percent chalky grains (5.0%). In terms of physicochemical properties, all had low gelatinization temperature and low amylase content except, HANGANGCHAL 1 which is waxy or glutinous. Crude protein of the samples ranged from 6.0% to 8.4%. Cooked grains of MILYANG 23 and GAYABYEO had significantly lower Instron hardness value compared to other non-waxy samples. Sensory evaluation revealed that most raw samples had translucent, slightly cream to cream, and slightly brittle to brittle grains. Except HANGANGCHAL 1, all samples had glossy cohesive, tender, and slightly tasty cooked grains. This study shows that varieties maintained their excellent grain quality characteristics even if grown in tropical condition. Aside from being potential parents for the development of new rice varieties with excellent cooking and eating qualities, these Korean rice varieties can be commercialized as quality rice in the Philippines.
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