Heterotic performance of Morpho-Physiological Traits for Heat Tolerance in Bread Wheat (Triticum aestivum L.)

Author: Amarjeet Kumar*, Swati, Sneha Adhikari, Anjali Joshi, Love Kumar, Alka Bharati, Birendra Prasad and Anil Kumar

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Abstract

Globally, wheat (Triticum aestivum L.) is the most important cereal. There are several challenges of wheat crop production due to climatic change, and among them, heat stress is a major one. A complete set of thirty-nine F1s, thirteen lines and three testers and two standard checks were evaluated in the RBD with three replications under two different environments, i.e., timely and late sown (E1 and E2). The different morpho-physiological characters like days to 75 per cent heading, days to maturity, plant height, spike length, relative injury (%) and grain yield per plantwere evaluated to estimate the heterosis level of different cross combinations.The standard heterosis over check UP2338, the highest negative significant heterosis was reflected in WH1124 × HD3059 (-6.96 %, -3.98 %) in E1 and E2, respectively, concerning days to 75 % heading. The highest negative significant heterosis over check DPW621-50 was observed in WH1124 × HD3059 (-5.58 %) and UP2843 × HD2967 (-3.52 %) in E1

Keywords

Heterosis, Heat tolerance, Wheat, Morpho-physiological traits, Wheat

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