Identification of new stable resistant sources and assessing agro-morphological performance of sponge gourd germplasm against Tomato Leaf curl New Delhi Virus incidence

Singh, Jogendra and Munshi, Anilabha Das and Singh, Deepak and Meena, Bharat Raj and Singh, Awani Kumar and Nagar, Arvind and Lyngdoh, Yvonne Angel and Tomar, Bhoopal Singh and Dey, Shyam Sundar and Ranjan, Jeetendra Kumar and Singh, Narendra and Kumar, Narendra and Mahajani, Kamla (2024) Identification of new stable resistant sources and assessing agro-morphological performance of sponge gourd germplasm against Tomato Leaf curl New Delhi Virus incidence. Frontiers in Plant Science, 15. ISSN 1664-462X

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Abstract

Tomato leaf curl New Delhi virus (TolCNDV) causes yellow mosaic disease, which poses a significant biotic constraint for sponge gourd cultivation, potentially resulting in crop loss of up to 100%. In the present investigation, 50 diverse genotypes were screened for 3 years under natural epiphytotic conditions. A subset of 20 genotypes was further evaluated across four different environments. The combined analysis of variance revealed a significant genotype × environment interaction. Eight genotypes consistently exhibited high and stable resistance in the preliminary screening and multi-environment testing. Furthermore, genotype plus genotype × environment interaction biplot analysis identified DSG-29 (G-3), DSG-7 (G-2), DSG-6 (G-1), and DSGVRL-18 (G-6) as the desirable genotypes, which have stable resistance and better yield potential even under diseased conditions. The genotype by yield × trait biplot analysis and multi-trait genotype–ideotype distance index analysis further validated the potential of these genotypes for combining higher yield and other desirable traits with higher resistance levels. Additionally, resistant genotypes exhibited higher activities of defense-related enzymes as compared to susceptible genotypes. Thus, genotypes identified in our study will serve as a valuable genetic resource for carrying out future resistance breeding programs in sponge gourd against ToLCNDV.

Item Type: Article
Subjects: Opene Prints > Biological Science
Depositing User: Managing Editor
Date Deposited: 24 Apr 2024 08:04
Last Modified: 24 Apr 2024 08:04
URI: http://geographical.go2journals.com/id/eprint/3596

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