EFFECT OF SEASONAL VARIATION ON NUTRITIONAL QUALITY OF COMMONLY CULTIVATED RICE VARIETIES ACROSS INDIA
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Date
2017-08-16
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Cereals are the major staple food crops worldwide and particularly rice in most of
the asian countries. To meet the food demand due to population explosion researchers
mainly focused on yield aspect during the green revolution and subsequent years. In the
last two decades, nutritionists have brought to light the importance of micronutrients and
anti-nutritional factors present in the food grains of humans and animals. Micronutrients
play vital role in the metabolism, healthy growth and development. Phytic acid, acts as
anti-nutritional factor by tightly binding with mineral nutrients forming a phytate
complex and affecting bioavailability of mineral nutrients in the human diet.
In the present study an attempt was made to study the nutritional composition and
seasonal variation in zinc, iron, calcium, phosphorous and anti-nutritional factor, phytic
acid in 54 commonly cultivated rice varieties. Initially, seeds were procured from Indian
Institution of Rice Research (I.I.R.R), Hyderabad and analyzed nutritional composition
(Zn, Fe, Ca, and P) and anti-nutritional factor (phytic acid) in dehusked grains. Results
showed significant variability in nutritional composition and anti-nutritional factor in the
rice varieties. Further, all the varieties were cultivated in kharif and rabi in 2016 at
GKVK, UAS, Bengaluru. The results indicate that nutritional composition and antinutritional
factor varied in greater extent between two consecutive seasons due to
influence of environmental factors and soil nutritional status. RT-PCR study revealed the
expression levels of Zn transporters in low and high Zn varieties. Hence, genetic and
environmental interactions plays a vital role in nutritional status in rice varieties.
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