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Abstract
Plant growth regulators play a central part in plant life. Plant hormones help to manage the equilibrium of phytohormones. Gibberellic acid, which is well known as a plant growth promoting hormone, is involved in a variety of activities related to plant growth and development. An experiment was performed at the Nuclear Institute of Agriculture, Tandojam with four promising canola genotypes in order to determine the impact of GA3 foliar application on canola growth and output during the rabi season in 2017-2018. The results showed that growth regulators levels significantly influenced the growth and yield of canola crops. It was observed that earlier days to maturity (108.39) was recorded in genotype R00-100/6, while maximum plant height (162.75), branches per plant (10.33), siliquae per plant (362.24), siliqua length (7.39 cm), seeds per siliqua (21.49), seed index (4.50 g) and seed yield (1443.08 kg ha-1) were observed with the application of GA3 5g ha-1 in SURHRAN-2012, followed by the application of GA3 6 g ha-1 genotype R00-125/12 and Rainbow (P). The results suggested that the variety SURHRAN-2012 x GA35 g ha-1 (foliar application) is comprised a suitable combination for obtaining maximum yield. Such application of GA3 is very advantageous in the field of plant development.
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