VEGETOS: An International Journal of Plant ResearchOnline ISSN: 2229-4473
Print ISSN: 0970-4078

Research Article, Vegetos Vol: 30 Issue: 1

Canopy Temperature an Effective Measure of Drought Stress Tolerance in RIL Population of Wheat

Ashutosh Srivastava*, Puja Srivastava, Achla Sharma, Sarlach RS
Department of Botany and Department of Plant Breeding & Genetics, PAU Ludhiana, India
Corresponding author : Ashutosh Srivastava
Department of Botany and Department of Plant Breeding and Genetics, PAU Ludhiana, India
E-mail: [email protected]
Received: October 31, 2016 Accepted: January 18, 2017 Published: January 23, 2017
Citation: Srivastava A, Srivastava P, Sharma A, Sarlach RS (2017) Canopy Temperature an Effective Measure of Drought Stress Tolerance in RIL Population of Wheat. Vegetos 30:1. doi: 10.5958/2229-4473.2017.00011.8

Abstract

Field experiments were conducted for evaluating recombinant inbred lines (RILs) of wheat cross of C518 and PBW343 under rainfed conditions by using plant water related traits viz; canopy temperature and stomatal density during rabi seasons 2012-13 and 2013-14. Both parents belonging to distinct adaptation group, offer several morpho-physiological contrasting traits. Canopy temperature (CT) and stomatal density (SD) were recorded under irrigated and rainfed conditions. Analysis of variance showed that CT and SD differed significantly under both conditions, indicating the existence of sufficient genetic variability among the populations. Frequency distribution for canopy temperature at anthesis among RIL population showed transgressive segregation under irrigated and rainfed conditions. Skewness (0.22) and kurtosis (0.27) was higher under rainfed conditions. Stomatal density does not vary greatly under water-deficit conditions. However, reduction in stomatal density was found under water stress conditions and recorded minimum stomatal density suggesting less transpiration rate under drought conditions resulting in minimize of loss of water. Under irrigated environment, canopy temperature at anthesis (CTA) showed non-signification correlation with stomatal density. While, under rainfed condition, canopy temperature among RILs showed significant negative correlation with stomatal density and yield attribute characters. This indicated that the selection for traits viz, canopy temperature and stomatal density may be effective measure of drought tolerance of wheat cultivars and yield improvement under drought stress conditions.

Keywords: Canopy temperature; Drought; RILs; Stomatal density; Wheat

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