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The resistance and tolerance of different Cocoa varieties to Cocoa swollen-shoot virus in Ghana



The resistance and tolerance of different Cocoa varieties to Cocoa swollen-shoot virus in Ghana



Ann. appl. Biol, 65: 3, 425-434



The above method was used to estimate the resistance and tolerance of 45 and 38 cacao progenies respectively. Resistance to virulent str. A of the virus was estimated from the proportion of inoculated seedlings developing symptoms and tolerance from the severity of these symptoms during a 4-month period. Resistance occurred among Nanay, Iquitos and Scavina, all Upper Amazon types; an inter-Nanay cross was outstandingly resistant and offers scope for improvement by breeding.

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Accession: 014767880

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DOI: 10.1111/j.1744-7348.1970.tb05511.x



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