Variation of major physico-chemical Properties related to grain quality by the rapidity of grain filling in rice
1999
Kwak, T.S. (Sangji University, Wonju (Korea Republic). College of Life Science and Natural Resources)
The rapidity of grain filling(RGF) varietal groups of used Korean native and introduced rice varieties from China were interpreted by the variation and principal component analysis of rapid grain filling rate, days from seeding to heading, protein content, amylose content, Mg/K equivalent rate, ADV and moisture content related to rice grain quality. The protein contents in all the RGF varietal groups was getting increased by increasing RGF. However the amylose content untill 80% of RGF was getting decreased by increasing RGF. The contents of Mg, K, Mg/K rate so closely related to grain quality were getting increased by increasing RGF. The alkali digestive value in rapid grain filling type varietal group with early maturing habit was lower than the alkali digestive value in more slow grain filling type varietal group with medium and late maturing habit. The relationship between protein content and Mg content showed positive significant correlation in all the RGF varietal groups. However the protein content and moisture content showed negative significant correlation in all the RGF varietal groups. The contribution of the first principal component score ranged from 31% to 41% in all the RGF varietal groups by the principal component analysis of RGF, days from seeding to heading and several physico-chemical properties related to grain quality. The factors belonged to the first principal components in all the RGF varietal groups were protein content and Mg/K rate which were negative correlated, days from seeding to heading and moisture content which were positive correlated.
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