1975 Volume 39 Issue 4 Pages 811-817
In the alkaliviscogram of starch of 26 nonwaxy ricer grown in the tropics, gelatinization normality correlated positively with final gelatinization temperature (BEPT) of starch (r=0.969**) and negatively with alkali spreading value of milled rice (r=-0.931**). Peak viscosity was not linearly related to amylose content. Among samples of rice starch having a high amylose (>28%) content, peak viscosity was correlated with the gel consistency of starch (r=-0.690**) and of milled rice (r=-0.644**) (n=18). These high-amylose starches showed the widest variation in peak viscosity. Amylose content, and gel consistency were inherited from the same parent in all nine varieties and lines studied, whereas peak viscosity, gelatinization normality and the final BEPT were inherited from either parent. The starch of five waxy rices showed higher peak viscosities even at a concentration of 1.8% as compared with a 2.0% nonwaxy rice starch.
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