Evaluation of bread wheat (Triticum aestivum L.) for terminal heat tolerance

Stuti Krishna; Priyanka Upadhayay; Vinod Kumar Mishra; Shubhra N. Kujur; Monu Kumar; Punam S. Yadav; Parvin Kumar Mahto; Prashant Singh; Ashutosh; Sandeep Sharma; Ramesh Chand

Stuti Krishna Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Priyanka Upadhayay Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Vinod Kumar Mishra Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Shubhra N. Kujur Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Monu Kumar ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Punam S. Yadav Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Parvin Kumar Mahto Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Prashant Singh Institute of Environmental and Sustainable Development, Varanasi, U.P.
Ashutosh Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Sandeep Sharma Department of Genetics and Plant Breeding, ICAR-Central Research Institute for Jute and Allied Fibre, Barrackpore
Ramesh Chand Department of Mycology and Plant Pathology, BHU, Varanasi, U.P

Keywords: Canopy temperature, DA, HCA, HSI, terminal heat stress

Abstract

Terminal heat tolerance of 34 wheat genotypes were analyzed for two years. Among 14 traits, canopy temperature, plot yield and days to heading were major components in clustering of genotypes. Three genotypes namely, DBW39, DBW16 and DBW14 had lowest heat susceptibility index (0.34-0.36) for plot yield and were considered as heat tolerant genotypes by both Hierarchical Cluster Analysis as well as Discriminant Analysis. These genotypes may serve as potential donors in wheat breeding to improve the terminal heat tolerance.