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Varietal response to groundnut rosette disease and the first report of Groundnut ringspot virus in Ghana

Citation

Appiah, AS and Offei, SK and Tegg, RS and Wilson, CR, Varietal response to groundnut rosette disease and the first report of Groundnut ringspot virus in Ghana, Plant Disease, 100, (5) pp. 946-952. ISSN 0191-2917 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 The American Phytopathological Society

DOI: doi:10.1094/PDIS-07-15-0838-RE

Abstract

Twelve cultivars of groundnut were screened in field trials for resistance to groundnut rosette disease (GRD), caused by coinfection with Groundnut rosette assistor virus (GRAV), Groundnut rosette virus (GRV), and its satellite RNA in the coastal savannah of Ghana. ‘Oboshie’ groundnut was rated as highly resistant; ‘Bremaowuo’, ‘Nkatefufuo’, and ‘Behenase’ as resistant; and ‘Nkosuor’, ‘Kumawu’, and ‘Otuhia’ as moderately resistant. GRAV infection rates of 11.8 to 61.8% (dry season) and 13.9 to 100% (wet season) were found, which included symptomless plants, suggesting that some lacked coinfection with GRV and its satellite. Chlorotic ringspot and line-pattern symptoms were observed, suggesting infection with Groundnut ringspot virus (GRSV). Virus identity was confirmed by enzyme-linked immunosorbent assay, reverse-transcription polymerase chain reaction, and amplicon sequencing. This is the first report of GRSV in Ghana. GRSV infection rates were 0.0 to 69.5% (dry season) and 26.1 to 69.5% (wet season). Mixed infections of GRAV and GRSV were common in all cultivars except Nkosuor and Bremaowuo in the dry season. Most cultivars graft inoculated with GRD showed significantly reduced height, leaf area, chlorophyll content, dry haulm weight, and seed yield compared with healthy plants. The sources of resistance to GRD and possibly GRAV and GRSV identified in this study could be exploited in groundnut breeding programs.

Item Details

Item Type:Refereed Article
Keywords:Arachis hypogaea, cultivar rating, groundnut, Groundnut ringspot virus, Groundnut rosette assistor virus, Groundnut rosette virus, mixed infection, peanut, resistant cultivars, satellite RNA
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Protection (Pests, Diseases and Weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Grain Legumes
Author:Appiah, AS (Mr Andrew Appiah)
Author:Tegg, RS (Dr Robert Tegg)
Author:Wilson, CR (Associate Professor Calum Wilson)
ID Code:106536
Year Published:2016
Web of Science® Times Cited:2
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2016-02-12
Last Modified:2017-04-12
Downloads:0

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