Rice (Oryza sativa L.) var. Kum Bangpra is improved purple pericarp variety
from pure line selection for five years during in-season and off-season to yield the desirable
phenotypic characters. The chemical and physical properties were compared with Riceberry
in lowland and upland conditions. Result revealed that the two rice varieties under lowland
conditions was significantly differed in plant growth paramet ers eg. plant height, tillers ,
harvesting time, panicle’s number per hill, and yield. Kum Bangpra variety gave the
highest yield of 705.80 kg. per Rai. Riceberry resulted to yield 462.20 kg per Rai, which
the growth parameters and yields were similar resulted in upland and lowland conditions.
Kum Bangpra variety and Riceberry yielded 654.80 and 412.60 kg. per Rai, respectively. It
is noticed that Kum Bangpra variety gave greater yield than Riceberry in both conditions.
In lowland condition found that Kum Bangpra variety expressed straw-colored husk, round
grain shape, dark purple husked grain, gelatinization temperature at 67°C, soft and sticky
cooked rice. Whereas Riceberry revealed dark purple husk, long and slender grain, dark
purple husked grain, gelatinization temperature at 70°C, and incoherent soft cooked rice.
Kum Bangpra variety contained greater amount of GABA, protein, fiber, omega 3, gamma
oryzanol, and antioxidants than Riceberry. It is suggested that Kum Bangpra variety found
low starch and amylose content of 7.15 % which is considered to appropriate the dietary
and sugar intake.