Screening of boro rice varieties of Assam, India to estimate their potential resistance to cold and heat stresses


Research Articles | Published:

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
Pub Email:
Doi: 10.1007/s42535-021-00235-9
First Page: 540
Last Page: 554
Views: 1051

Keywords: Boro rice (Oryza sativa L.), Heat and cold stresses, Morpho-physiological parameters, Total stress response index


Temperature stress is a major concern in the agricultural practices due to the changing global climatic condition. The present investigation was conducted to evaluate cold and heat tolerant ability of few boro rice cultivars of Assam, India. Based on the different morpho-physiological responses under heat and cold stresses, 27 boro rice cultivars showed varying degrees of susceptibility. The total stress response index (TSRI) calculated on the basis of morpho-physiological parameters identified Buro as the most tolerant variety under both cold and heat stress. In contrast, Disang and Swarnabh were found to be the most susceptible cultivars under both the stresses. Our findings suggest that morpho-physiological traits are useful in screening rice varieties under environmental stress and TSRI can prove to be a suitable marker for developing promising heat and cold tolerant rice varieties in further rice breeding programs.

                        Boro rice (Oryza sativa L.), Heat and cold stresses, Morpho-physiological parameters, Total stress response index

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Author Information

Rehman Mehzabin
Plant Molecular Biology Laboratory, Department of Botany, Gauhati University, Guwahati, India

Tanti Bhaben
Plant Molecular Biology Laboratory, Department of Botany, Gauhati University, Guwahati, India