Author(s):

Neelambari, AK Singh, Shailesh Kumar, Rima Kumari and Pankaj Kumar

Abstract: The experiment was carried out under laboratory condition to investigate the impact of individual as well as combined salinity and high temperature stress on germination and early seedling growth of wheat and to screen contrasting sets of wheat genotypes for combined stress. Three replications of screen forty six winter wheat (Triticum aestivum L.) genotypes were subjected to two levels of salinity stress i.e. 4 and 8 dSm^-1 with salt combination of NaCl:CaCl₂:Na₂SO₄ in a ratio of 7:2:1 and high temperature treatment that was given by transferring the seeding in the incubator at temperature 37± 2°C. The physiological parameters i.e. seedling length, seedling fresh weight, seedling dry weight and SPAD value were measured in 10 days old seedling. The result indicated that, all parameters were found decreased under the influence of these stress but the reduction was most severe under combined second salinity level and high temperature stress when compared to ambient condition. Also genotypes KRL-1-4, KRL-19 and HD-2733 were found to be most tolerant and HI-1563, HD 2329 and HT-8 were the most susceptible in terms of physiological parameters under given treatments. It was concluded that there is a genetic variability among the wheat genotypes that can be used in breeding programs to improve wheat yield.

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