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2021(4)      October - December, 2021
https://doi.org/10.35495/ajab.2021.02.097

Physiological changes associated with Okra mosaic virus infection in field grown okra plants
 

Samuel Amiteye1,2, Andrew Sarkodie Appiah1*, Frederick Boateng2, Jacob Teye Kutufam1, Harry Mensah Amoatey2

 

1Biotechnology Centre, Biotechnology and Nuclear Agricultural Research Institute (BNARI), P. O. Box AE 50, Accra, Ghana.

2Department of Nuclear Agriculture and Radiation Processing, School of Nuclear and Allied Sciences, College of Basic and Applied Sciences, University of Ghana, Accra, Ghana

Abstract

As a prerequisite for the breeding of virus-resistant okra cultivars, the effect of Okra mosaic virus infection on physiological performance of ten okra cultivars were assessed under field conditions within the coastal savannah agro-ecological zone of Ghana. All cultivars succumbed to the disease and expressed varying degrees of symptoms. The results showed that plant height at initial and 50% flowering were significantly reduced with cultivar Clemson spineless showing the highest reduction of 38% and 35% respectively. Plant height at 50% podding was also reduced in all cultivars with the highest reduction (40%) occurring in cultivar Clemson spineless. Virus-infected plants of cultivars Kwabenya 1, Labadi dwarf and Asutem took on the average 43 days to attain 50% flowering compared to 25 days in healthy or control plants. Diseased plants had significantly (P<0.05) delayed, taking on the average 47 days after planting to attain 50% podding compared to the control plants with an average of 35 days. Infected plants of cultivars Kwabenya 1 and Labadi dwarf took the highest number of 51 days to attain 50% podding. Pod length and width were also reduced in all cultivars but were highest in cultivars Lucky 19 F1 and Clemson spineless at 52.19% and 46.25% respectively. Based on this assessment, cultivars Adom and Asutem which were less affected in terms of disease severity and fruit yield reduction could be exploited in future breeding programmes.

Keywords: Okra, Plant growth, Okra mosaic virus, Virus resistant, Symptoms

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