The Terminal Heat Stress and its Effect on Yield and Yield Contributing Traits of Wheat (Triticum aestivum L.) Genotypes
Akash Tiwari
Department of Crop Physiology, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Shambhoo Prasad *
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Saurabh Yadav
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Vandana Kushwaha
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Ashish Yadav
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Abhishek Gourav
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Prabhat Kumar Singh
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Saurabh Singh
Department of Crop Physiology, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Adesh Kumar
Department of Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224229, U.P., India.
Rudra Pratap Singh
Department of Agricultural Biochemistry, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-22422,U.P., India.
*Author to whom correspondence should be addressed.
Abstract
An experiment was conducted with wheat genotypes NWL-14, K-9162, NWL-1014, NWL-12-2, NWL-12-4, NWL-10-4, K-910-30, NWL-4035, DBW-16, DBW-187, NWL-12 (3) T, Halna, HD-2967 to evaluate heat tolerant in wheat at instructional farm and in the laboratory of Crop Physiology & Plant Molecular Biology and Genetic Engineering, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya, India, during rabi season of 2021-2022. Heat stress was induced by delayed sowing 45 days from normal date of sowing (02 December 2022)-(17 January 2023) so that delay sown wheat genotypes could experience heat stress at reproductive stage. Heat tolerant wheat genotypes screened on the basis of Relative Water Content, Catalase activity, plant height, tiller number, number of grains per spike, test weight and grain yield per plant over control under heat stress condition. Heat stress reduces the the growth and yield irrespective of wheat genotypes but heat tolerant genotypes Halna, NWL-1293)T, NWL 10-2 and NWL-12-4 showed less reduction over susceptible ones. Relative water content, proline and catalase activity can be used as a physiological screening indices for heat tolerant genotypes.
Keywords: Heat, relative water content, proline content, catalase activity, yield, yield components