Author(s): A. CHAKRAVORTY

Abstract: A field experiment was conducted at the research farm of Sripat Singh college, Jiaganj,West Bengal taking eight rice landraces with two aromatic rice cultivars viz., Biroin and Gandhibiroin of Bagbari village, Karimganj, Assam for the assessment and to study magnitude of genetic variability based on fifteen agro-morphological traits including one biochemical trait. Data on qualitative traits were recorded following DUS test and significant variability was found for the traits like leaf anthocyanin colouration, flag leaf attitude, time of heading and basal leaf sheath coloration. Quantitative traits were analyzed and maximum variability was found for the traits like leaf length, number of grains panicle-1, seedling height and grain yield plant-1. Results showed that high estimates of heritability coupled with high GCV and high genetic advance were found in case of grain yield per plant, number of grains panicle-1, seedling height and crude protein plant-1. The higher genotypic and phenotypic coefficient of variation was found for the traits like grain yield, crude protein number of grains panicle-1, leaf breadth, seedling height and grain breadth. Results also showed that the grain yield plant-1 had a highly positive correlation with number of grains panicle (r=0.823)-1 followed by 1000 grain weight (r=0.704) and leaf breadth (r = 0.552). Also, leaf breadth (r = 921), flag leaf angle (r = 0.804), grain length (r=0.700), grain L/B ratio (r = 0.625) and grain yield (r = 0.410) had maximum correlation with the leaf length. Hence, these experimental observations would be beneficial for any rice breeding programme to choose the desirable trait for crop improvement programme choosing the appropriate traits of interest from traditional rice having aromatic feature.

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