Abstract:A field experiment was conducted at ICR farm of Assam Agricultural University, Jorhat during
rabi season of 2019-2020 with 12 (twelve) diverse genotypes of sweet sorghum with the aim to study their performance in terms of phenological, physiological traits and yield. The experiment was laid out in randomized block design with three replications and the crop was raised following the recommended package of practices. The phenological, physiological parameters, yield attributes and yield were recorded following the standard methodologies.
A significant variation of all the above traits were recorded among different genotypes of sweet sorghum. Among the genotypes, ICSV 15006 required minimum duration with respect to all the phenological parameters, viz., days to seedling emergence, tiller initiation, maximum tillering, 50% flowering and physiological maturity, while, ICSV 13012 required maximum duration with respect to above traits. The genotype ICSV 15006 possessed the highest leaf dry weight, stalk dry weight, panicle dry weight and total dry weight at harvest, while, the genotypeICSV13012 possessed the lowest values. Significantly higher number of stomata, epidermal cells and stomatal index in both abaxial and adaxial leaf surfaces were recorded in the genotype ICSV 15006, while, the lowest values were found in ICSV 13012.
The highest grain yield (1.06 t ha-1) was obtained from the genotype ICSV 15006 followed by ICSV 25274(1.03 t ha-1). Among the genotypes, ICSV-15006 and ICSV-25274 were identified as the superior genotypes based on the physiological traits and yield.