Biochemical evaluation and correlation studies for grain characteristics in Kalanamak advanced recombinant lines

The present investigation was undertaken with the objective of evaluation of grain characteristics in Kalanamak Advanced Recombinant Lines (KARL). Trials were conducted for two consecutive wet seasons during Kharif 2016 and 2017 at Norman E. Borlaug Crop Research Centre (NEBCRC), G. B. Pant University of Agriculture and Technology (GBPUAT), Pantnagar, Uttarakhand in a Randomized Complete Block Design in three replications with the spacing of 20 cm × 15 cm and the harvested kernels were used for biochemical analysis. KARL 2 (21.33%), KARL5 (22.13%), KARL6 (21.33%) and KARL 10 (21.67%) showed intermediate amylose content. KARL 5 has highest endosperm amylose content while KARL 8 (19.47%) shows minimum amylose content. These lines have high to intermediate alkali spread value while intermediate to low Gelatinization temperature. Gel consistency value was recorded highest for KARL 8 (73 mm) and minimum for PSD -17 (54 mm). High value of Hulling (%), Milling (%) and Head rice recovery (%) was reported for all KARL genotypes over the check variety PSD -17. Based on the result of this study it can be inferred that these Kalanamak lines are good source of quality rice intermediate amylose content, soft gel consistency and intermediate gelatinization temperature. These genotypes can be further utilized in improving the biochemical quality traits in rice.