Isolation and Characterization of Mottle Virus from Wild Peanut

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Abstract
Wild species of peanut are being used in breeding programs to transfer disease resistance into common cultivars [of peanut, A. hypogaea]. One such peanut accession, PI [plant introduction] 276235 ([GK 10603] A. chacoense) had mild mottling and was suspected of carrying peanut mottle virus (PMV). A long flexuous rod-shaped virus 600-900 nm long, serologically and symptomatically related to PMV, was isolated from PI 276235. The virus was mechanically and graft-transmitted to 2 cultivars [Tamnut 74 and Comet] producing severe mottling, chlorosis, leaf rolling and stunting. The virus, as expressed by the mild symptoms on PI 276235, apparently had little on the growth of that plant greenhouse and field conditions. A. chacoense plants may serve as reservoirs for PMV.

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