Physico-Chemical Properties, Sensory Characteristics and Glycemic Index of Tidal Peat-Swamp Rice Grown in South Kalimantan
Panjang" rice is an ethnic rice strain found in a tidal peat swamp Aluh-Aluh, South Kalimantan. A series of analyses on its sensory and physico-chemical properties included proximates, mineral content, amylose content, starch gelatinization, grain size and color were carried out to compare its quality to that of the commercial wet-land rice. Its glycemic index was also measured to explore its low glycemic potency. "Panjang" rice was classified as a medium sized grain (5.50 mm length) with high amylose content of 31.1% (db), gelatinized at 77.3 o C with gelatinization peak at 97.5 o C and maximum viscosity at 637.5 BU. There were significant differences between "Panjang" rice and IR 42 in ash, fat, protein, carbohydrate, and mineral (Na, S and P) contents, amylose content as well as grain brightness. No significant (p<0.05) difference was observed in sensory properties between "Panjang" and""IR 42" cooked rice, except that no bitter taste was sensed in "Panjang" rice . Based on its glycemic index, which"was as low as 46.8, "panjang" rice can be classified as low glycemic index rice.