HomeInternational Rice Research Notesvol. 22 no. 2 (1997)

Physicochemical Properties of Japonica and Indica Waxy Rice

Y D. Kim | S J. Yang | Normita M. Dela Cruz | G S. Khush

Discipline: Agriculture



Waxy rice is important for dessert and sweet products. Five japonica and five indica varieties were tested during 1996 to compare their physicochemical properties. The varieties were Sinseonchalbyeo, Buklukbanna, Wonsanchalbyeo, Iri309, and Hwaseonchalbyeo (japonica) and Hankangchalbyeo, Iri352, IR29, IR65, and RD6 (indica).

aroma—are simply inherited, but linear grain elongation follows a complex pattern of inheritance. In thaladi 1995 (September-October-January-February), we evaluated 23 rice genotypes along with two checks, Taraori Basmati and Pusa Basmati, for hulling, milling, head rice recovery, breadth, length-breadth ratio (L/B), and elongation ratio for rice quality improvement. A randomized block design with three replications was used on 12-m2 plots and each genotype transplanted with 20- × 15-cm spacing.


eoptiles (Fig. 2a), so in all subsequent experiments only basal portions from 3-d-old rice coleoptiles were used. Figure 1 shows results of culturing coleoptile basal portions in N62 medium with NAA. Adding 0.1 mg NAAL-1 resulted in a significant increase in callus induction over N62 medium containing no NAA. Concentrations of 0.5 or 1 mg NAAL-1 also improved induction as compared with the N62 medium. Effects increasing sucrose concentration were also tested. While 4.5% sucrose increased callus formation very significantly, 6% gave results lower than the control (Fig. 2b). Effects of using 2, 4-D at 3, 4, or 5 mgL-1 were compared with those at 2 mgL-1. Concentrations higher than 2 mgL-1 improved callus induction (Fig. 2b), but no significant differences were found among 3, 4, or 5 mgL-1.