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ARS Home » Southeast Area » Tifton, Georgia » Crop Genetics and Breeding Research » Research » Publications at this Location » Publication #204627
Title: First Report of Peanut Mottle Virus in Forage Peanut (Arachis glabrata) in North America

Author
item NISCHWITZ, C - UNIV OF GA
item Maas, Andrea
item MULLIS, S - UNIV OF GA
item CULBREATH, A - UNIV OF GA
item GITAITIS, R - UNIV OF GA

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/2/2007
Publication Date: 2/2/2007
Citation: Nischwitz, C., Maas, A.L., Mullis, S.W., Culbreath, A.K., Gitaitis, R.D. 2007. First Report of Peanut Mottle Virus in Forage Peanut (Arachis glabrata) in North America. Plant Dis. 91:632.

Interpretive Summary: Rhizoma peanut is a tropical legume that combines both high nutritive value and long-term persistence under a wide range of grazing and harvested hay systems currently providing some growers with high economic return. The current high value, expanding acreage, and perennial nature of this species necessitates the identification of potential constrains to yield and quality. The goal of this study was to identify the causal agent of chlorotic ring spots present on rhizoma peanut plants, and it’s potential to impacted forage production. It was determined that the causal agent of disease was Peanut mottle virus (PMV), and presented a potential to impact forage quality.

Technical Abstract: Plant material of rhizoma peanut (Arachis glabrata) of an unknown accession, obtained from the Arachis species collection nursery planted and maintained at the Coastal Plain Research Station, Tifton, GA was recently brought into the greenhouse where ring spots were identified on immature leaves. Tissue samples were tested for virus using ELISA and PCR methods. Results indicated the presence of Peanut mottle virus (PMV). An additional 42 genotypes from the same location planted in 1960 and 1979 were tested from greenhouse material to verify the presence or absence of PMV. An additional five genotypes were ELISA positive for potyvirus. These were further tested by PCR for PMV and two genotypes tested positive for PMV, the original unknown accession and PI 243334. This is the first report of PMV in rhizoma peanut.