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Sweetpotato viruses: 15 years of progress on understanding and managing complex diseases

Sweetpotato (SP) (Ipomea Batatas (L) Lam) a member of Convolvulaceae family is important food security crop globally. The SP is indeterminant perennial and is grown as an annual crop in the tropic and subtropics. The most used propagation method is vegetative resulting in virus accumulation within planting stocks. This has adverse effects on yields and quality of crop especially in high yielding varieties. The viral load is subject to agro-ecological zone hence varied management techniques have been developed. This article gives reviews of knowledge previously gained and suggestions of possible developments towards sustainable management programs for viral diseases. In brief, 30 viruses belonging to 9 families and broadly grouped as DNA or RNA viruses, affect SP.  A major pre-disposing factor to virus epidemiology is wild SP species and other plants which act as natural reservoirs of viruses. The management of SP viruses needs rapid and precise detection. Over the years, Polymerase Chain Reaction (PCR) based approaches have been developed and enable better understanding of host-virus interaction. Development of sweetpotato virus disease (SPVD) management has evolved with advancement in technology for instance the use of virus free innoclum to engineered SP plant. even with these major breakthrough’s efforts need to be continued to elucidate mechanisms used by virus such as SPMMV, SPCFV, SPCSV and SPVD against SP plant defense and use the knowledge to develop more resistant SP crops.

Authors: Christopher Clark, Jeffrey A. Davis, Jorge A. Abad, J. Cuellar, Settumba Mukasa, Arthur Tugume, Fred Donati Tairo, Jari P. T. Valkonen, Segundo Fuentes, Jan Kreuze, Richard Gibson, Christopher Clark, Jeffrey A. Davis, Jorge A. Abad, J. Cuellar, Settumba Mukasa, Arthur Tugume, Fred Donati Tairo, Jari P. T. Valkonen, Segundo Fuentes, Jan Kreuze, Richard Gibson

Contributors: Segundo Fuentes, Segundo Fuentes

Subjects: Sweetpotato viruses

Pages: 18

Publisher: The American Phytopathological Society

Publication Date: 2012

Keywords: SPVD, Sweet potato chlorotic fleck virus, Sweet potato chlorotic stunt virus, Sweet potato virus disease, Sweetpotato viruses, Virus characterization

HOW TO CITE

Clark, C.A., Davis, J.A., Abad, J.A., Cuellar, W.J., Fuentes, S., Kreuze, J.F., Gibson, R.W., Mukasa, S.B., Tugume, A.K., Tairo, F.D. and Valkonen, J.P., 2012. Sweetpotato viruses: 15 years of progress on understanding and managing complex diseases. Plant Disease, 96(2), pp.168-185.