Indian Society of Genetics & Plant Breeding

Evaluation of bread wheat (Triticum aestivum L.) genotypes for terminal heat tolerance under different environments

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Thirty five genetically diverse bread wheat genotypes were
evaluated for terminal heat tolerance in three environments
by altering the sowing dates viz., non stress (E1), mild heat
stress (E2) and high heat stress (E3) using physiological
indices. Twelve genotypes showed the consistent
performance under E1 and E3 environments. Genotypic
performance varied substantially over the E1 and E3
environments. Genotypes namely, HD 2733, CL 3125, HD
2189, C 306, DBW 14, WR 544, PBW 373, HD 2932, Kundan,
HD 2967, HD 2997 and L 512 showed least heat susceptibility
index (HSI) for grain yield ranging from 0.1 to 0.5. These
genotypes also showed least HSI for other associated
characters viz., canopy temperature depression, membrane
stability index, 1000 grain weight and biological yield and
hence can be regarded as tolerant to terminal heat stress.
Since the identified genotypes can cope up the effect of
heat stress, they can be utilized for developing heat tolerant

Keywords: Wheat, terminal heat stress, heat susceptibility index, canopy temperature depression, membrane stability index


Year: 2013
Volume: 73
Issue: 4
Article DOI: 0.5958/j.0975-6906.73.4.068
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Pramod Kumar info_circle
G. P. Singh, J. B. Sharma and Rahul Gajghate info_circle

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