Stability and suitability of genotypes and environment to Ascochyta blight of chickpea

Sharma, M and Chandran, U S S and Rani, U and Singh, S K and Basandrai, A K and Basandrai, D (2023) Stability and suitability of genotypes and environment to Ascochyta blight of chickpea. Frontiers in Plant Science (TSI), 14. 01-08. ISSN 1664-462X

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Abstract

Ascochyta blight (AB) is a major biotic constraint to chickpea production internationally. The disease caused by the phytopathogenic fungus Ascochyta rabiei is highly favored by prolonged spells of low temperature and high humidity. The disease scenario is expected to aggravate in the near future as a result of rapidly changing climatic conditions and the emergence of fungicide-resistant pathogen strains. Tapping into host–plant resistance is the most logical way to preempt such a crisis. Presently, high levels of stable resistance against AB are yet to be identified from the chickpea gene pool. The present study was aimed at facilitating this process through multi-environment testing of chickpea genotypes. Using the GGE biplot analysis method, we could identify three genotypes, viz., ICCV 16508, ICCV 16513, and ICCV 16516, from the International Ascochyta Blight Nursery, which showed consistent moderate resistance reactions across all the tested environments. Moreover, we were able to evaluate the test locations for their suitability to support AB screening trials. Ludhiana and Palampur locations were identified as the most ideal for continual screening in the future. Controlled environment screening at the ICRISAT location offered to reduce large plant populations to small meaningful sizes through initial screening under controlled environment conditions. This study will further improve the scope of phenotyping and sources of stable resistance to be utilized in future AB resistance breeding programs.

Item Type:	Article
Divisions:	Global Research Program - Accelerated Crop Improvement
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Ascochyta blight, chickpea, multi-environment testing, G x E interaction, GGE biplots, principal component analysis
Subjects:	Mandate crops > Chickpea Others > Plant Pathology
Depositing User:	Mr Nagaraju T
Date Deposited:	29 Jan 2024 06:06
Last Modified:	29 Jan 2024 06:06
URI:	http://oar.icrisat.org/id/eprint/12396
Official URL:	https://www.frontiersin.org/articles/10.3389/fpls....
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	We acknowledge the NARS pathologists of respective universities/trial locations for their support in evaluating the AB disease nursery.
Links:	Google Scholar

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