Agronomic Performance of Chickpea Affected by Drought Stress at Different Growth Stages

Sachdeva, S and Bharadwaj, C and Patil, B S and Pal, M and Roorkiwal, M and Varshney, R K (2022) Agronomic Performance of Chickpea Affected by Drought Stress at Different Growth Stages. Agronomy (TSI), 12 (5). pp. 1-26. ISSN 2073-4395

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Abstract

Susceptibility to drought stress has restrained chickpea productivity at a global level, and the development of drought-tolerant varieties is essential to maintain its productivity. Therefore, the present study was conducted to evaluate genetic divergence in selected genotypes of chickpea and their morpho-physiological responses under irrigated and stressed conditions to identify the traits that account for the better performance of these genotypes under stressed conditions, as well as genotypes with improved drought tolerance. The genotypes were evaluated for two years under irrigated and drought stressed conditions, and significant variation was found amongst the genotypes for different morpho-physiological and yield traits. The maximum reduction was observed for plant yield (33.23%) under stressed conditions. Principle component analysis (PCA)-based biplots and correlation studies established its strong positive correlation with relative water content (RWC), membrane stability index (MSI), chlorophyll index (CI), secondary branches (SB) and yield traits and negative correlations with drought susceptibility index (DSI), days to maturity (DM) and 100 seed weight (100 SW) under drought stress, suggesting their use in selecting drought-tolerant germplasm. Ten genotypes with high values of RWC, MSI, CI, SB, yield traits and lower DSI were identified as drought-tolerant and might serve as ideal donors in the forthcoming breeding of elite chickpea cultivars. The seed-filling stage began earlier in these genotypes, with significantly reduced days to maturity under stressed conditions. Our results indicate selection for earliness offers a promising strategy for the development of drought-tolerant chickpea cultivars.

Item Type:	Article
Divisions:	Center of Excellence in Genomics and Systems Biology
CRP:	UNSPECIFIED
Uncontrolled Keywords:	chickpea, drought stress, plant yield, drought susceptibility index, earliness
Subjects:	Mandate crops > Chickpea Others > Drought
Depositing User:	Mr Nagaraju T
Date Deposited:	12 Feb 2024 04:26
Last Modified:	12 Feb 2024 04:26
URI:	http://oar.icrisat.org/id/eprint/12452
Official URL:	https://www.mdpi.com/2073-4395/12/5/995
Projects:	UNSPECIFIED
Funders:	ICAR, Government of India, Government of India - Department of Biotechnology
Acknowledgement:	We duly acknowledge the support of Division of Genetics, Indian Agricultural Research Institute, New Delhi, that provided facilities to carry out phenotyping and data analysis.
Links:	Google Scholar

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