Plant material and procedures
The present investigation was carried out at the farm of Rice Research and Training Center (RRTC), Sakha, Kafr El Sheikh, Egypt for two successive seasons 2014 and 2015. Twenty rice varieties (commercial and promising rice lines) were used in this study. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Genotypes were grown in five meters apart maintaining 20 cm ×20 cm plant spacing of individual genotype and all the recommended
cultural practices for rice was applied