Evaluating thermotolerant sunflower genotypes with temperature induction response (TIR) technique
Journal Title: Environment Conservation Journal - Year 2024, Vol 25, Issue 1
Abstract
High temperature affects various physiological processes of the plant. Delayed sowing and changing climate both subject the crop to increasing temperatures during the crop growth period. There is a need to take on a technique to screen the wide number of genotypes for high-temperature tolerance. In the present study, a screening protocol was followed based on the principle of “acquired tolerance” in which 47 sunflower seedlings were exposed to sub-lethal heat stress to induce tolerance before subjecting to subsequent lethal stress and the second set were directly exposed to lethal stress. Significant variation was observed for the traits - survival percentage, total seedling length, and seedling weight. Tolerant inbreds were identified using Z distribution and PCA. Results suggested that TIR is a rapid and powerful technique that can be used to screen large number of germplasms to identify thermotolerant lines.
Authors and Affiliations
Aparna V, Lakshmi Prayaga, Sarada C, Arti Guhe
Keywords
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