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EVALUATION OF POTATO GERMPLASM FORLATE BLIGHT AND POTATO CYST NEMATODERESISTANCE UNDER NORTH-WESTERNINDIAN HILLS

Indian Agricultural Research Journals

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Title EVALUATION OF POTATO GERMPLASM FORLATE BLIGHT AND POTATO CYST NEMATODERESISTANCE UNDER NORTH-WESTERNINDIAN HILLS
 
Creator Dalamu
JK Tiwari
A Bairwa
S Sharma
 
Subject Late blight, PCN, yield, indigenous, potato germplasm
 
Description Late blight disease caused by the fungus Phytophthora infestans is the main yield limiting factor amongstthe diseases of potato in India and across the globe. Potato Cyst Nematode/PCN (Globodera spp.) is another biotic factorof economic importance and is a quarantine organism. Exploitation of genetic resistance is the most preferred managementstrategy. In the present study, indigenous potato genotypes collected from different parts of the country along with checkswere evaluated for their resistance against late blight under natural epiphytotic field conditions and in laboratory underartificially inoculated conditions including detached leaf and tuber slice assays and PCN through Root ball techniqueduring 2020-2023. The converted field scale values i.e. average AUDPC value ranged from 7 in highly resistant genotypeRangpuria to 1596 in susceptible accession AGR/56. The field blight response was comparatively more correlated (r =0.63)with susceptibility levels measured in the detached leaf assay compared to that with tuber slice assay (r =0.48). GenotypesKanpuria Safed, JG-1, Rangpuria and Desi Aloo showed resistance to late blight both under laboratory and field conditions.For PCN, Garlentic, Jeevan Jyoti and JG-1 have combined resistance (0 female/root ball) over the years to both the species.Majority of the studied genotypes have medium to high pollen viability with desirable tuber traits and yield advantage.The identified resistant genotypes excel their usage as parental lines in breeding for biotic stress resistance specificallyfor late blight and PCN.
 
Publisher Indian Potato Association (IPA)
 
Date 2024-04-04
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/PotatoJ/article/view/145559
 
Source Potato Journal; Vol. 50 No. 2 (2023): Potato Journal
0973-5909
0970-8235
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/PotatoJ/article/view/145559/54286
 
Rights Copyright (c) 2024 Potato Journal
https://creativecommons.org/licenses/by-nc-sa/4.0