Quality Traits in Rice under Three Different Water Regimes

The present study was undertaken to study specific adaptability of 42 different rice genotypes under different water regimes and to understand the correlation between different yield and quality traits. The mean performance of genotypes under three sets of conditions indicated substantial differences in quality under rainfed and terminal stage drought (TSD) conditions as compared to the irrigated condition. High estimates of genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were observed for gel consistency, amylose, and water uptake and gelatinization temperature under all the three condition. Moderate estimates of genotypic coefficient of variation was observed for milling per cent, head rice recovery per cent, and moderate phenotypic coefficient of variation was observed for hulling per cent, brown rice length: breadth ratio, milled rice lenth: breadth ratio, elongation index and head rice recovery per cent. The highest heritability estimates (>70%) were observed for water uptake, gel consistency, amylose and HRR% under irrigated, for hulling%, milling%, gel consistency, amylose and head rice recovery (HRR %) under rainfed and for gelatinization temperature, gel consistency and amylose under terminal stage drought condition. Only kernel length after cooking showed correlation with head rice recovery in terminal stage drought (TSD) condition and elongation ratio and amylose were the two traits which exhibited correlation with head rice recovery under irrigated condition. Under irrigated condition 34 entries possessed long bold grains followed by 31 entries under rainfed and 33 entries under TSD condition. While, short bold grains were observed in 8 entries under irrigated, 11 entries under rainfed and 9 entries under terminal stage drought condition.