TITLE:
Biochemical Traits and Physico-Chemical Attributes of Aromatic-Fine Rice in Relation to Yield Potential
AUTHORS:
M. Abdul Baset Mia, Mira Rani Das, Muhammad Kamruzzaman, Nur Muhammad Talukder
KEYWORDS:
Biochemical Properties; Aromatic Rice; Yield; Grain Quality
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.3 No.12A,
December
31,
2012
ABSTRACT:
Aromatic rice has great potential to attract rice
consumer for its taste and deliciousness, and high price to boost up the
economic condition of the rice grower in the developing countries. A field
experiment was conducted to evaluate the morpho-physiological and biochemical
attributes in relation to yield potentials of fine aromatic rice varieties in
Bangladesh. Two aromatic fine rice cultivars,
Ukunmadhu and Kataribough (local land races), one hybridized variety
BRRIdhan-32 and one mutant variety Binasail were used in the experiment. The
results revealed that rice varieties BRRIdhan-32 and Binasail showed the greater number of branches of panicle, grain
size, grain yield and harvest index as compared to aromatic varieties. On the
other hand, aromatic rice showed taller plant stature, more tiller, plant biomass and larger panicle but lower number of primary and secondary
branches, grain size, yield and harvest index. The biochemical attributes namely
chlorophyll and soluble protein content were higher at vegetative stage as
compared to panicle initiation and flowering stages. The aromatic rice
Kataribhough and Ukonmondhu contained higher amount of total free amino acid as
compared to that of Binasail and BRRIdhan32. Other biochemical parameters
namely nitrate reductase activity (NRA), total sugar and free amino acid
contents were higher at flowering stage compared to those contained at
tillering and panicle initiation stages. Physico-chemical properties of grain
viz. length, breadth, L/B ratio, nitrogen (%) and protein (%) were
significantly higher in fine rice as compared to aromatic rice. From the
results it may be concluded that the high yielding varieties were more
efficient in transfer of photosynthate to the grain i.e. economic yield and that is why BRRIdhan32 recorded the highest
yield. Poor yield in Ukonmodhu and Kataribhough was due to low harvest index
indicating minimum translocation of assimilates to the grains.