Department of Agronomy, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125 004.
*Present address: Directorate of Millets Development, Department of Agriculture and Cooperation, Ministry of Agriculture, Jaipur, Rajasthan 302 016.
**Present address: JNKVV, Jabalpur, Madhya Pradesh.
***Present address: Project Directorate for Cropping Systems Research, Modipuram, Meerut, Uttar Pradesh 250 110.
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A field experiment was conducted during 1997–98 and 1998–99 at Hisar, to evaluate the response of wheat (Triticum aestivum L. emend. Fiori & Paol.) genotypes to post-anthesis moisture stress by chemical desiccation under different environments. The growth and yield parameters, viz. dry-matter production, grains/spike and 1,000-grain weight, were significantly higher in normal irrigated environment by 27.62, 26.68 and 56.39% than dry and 19.99, 47.41 and 112.11% higher than 0.1% potassium iodide (KI) spray on whole canopy of wheat. Wet environment recorded 23.19, 120.22 and 48.25% higher grain yield in wheat over dry, 0.1% KI spray on whole canopy and vegetative parts escaping ears. Among the 4 desiccant sprayed environments, significantly higher growth, yield attributes and yield were obtained in 0.075% KI spray on vegetative parts as compared to 0.1 and 0.075% KI spray on whole canopy. Among genotypes, ‘UP 2338’ recorded 6.33, 18.06 and 33.95% higher number of grains/spike over ‘PBW 343’, ‘WH 533’ and ‘Lok 1’. Wheat cv. ‘UP 2338’ fetched more grain yield by 7.51, 20.23 and 44.63% than ‘PBW 343’, ‘WH 533’ and ‘Lok 1’ and found to be less sensitive to post-anthesis moisture stress compared with the other genotypes.
Moisture stress, Growth, Yield, Potassium Iodide (KI), Wheat genotypes
