Cultivar-specific effects of pathogen testing on storage root yield of sweetpotato, Ipomoea batatas

Okpul, T., Maltby, J., Guaf, E., Coleman, E. A., Dennien, S., Harding, R. M., Dieters, M. J. and Godwin, I. D. (2011) Cultivar-specific effects of pathogen testing on storage root yield of sweetpotato, Ipomoea batatas. Annals of Applied Biology, 158 3: 288-296. doi:10.1111/j.1744-7348.2011.00463.x

Author Okpul, T.
Maltby, J.
Guaf, E.
Coleman, E. A.
Dennien, S.
Harding, R. M.
Dieters, M. J.
Godwin, I. D.
Title Cultivar-specific effects of pathogen testing on storage root yield of sweetpotato, Ipomoea batatas
Journal name Annals of Applied Biology   Check publisher's open access policy
ISSN 0003-4746
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1111/j.1744-7348.2011.00463.x
Volume 158
Issue 3
Start page 288
End page 296
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2012
Language eng
Abstract The accumulation and perpetuation of viral pathogens over generations of clonal propagation in crop species such as sweetpotato, Ipomoea batatas, inevitably result in a reduction in crop yield and quality. This study was conducted at Bundaberg, Australia to compare the productivity of field-derived and pathogen-tested (PT) clones of 14 sweetpotato cultivars and the yield benefits of using healthy planting materials. The field-derived clonal materials were exposed to the endemic viruses, while the PT clones were subjected to thermotherapy and meristem-tip culture to eliminate viral pathogens. The plants were indexed for viruses using nitrocellulose membrane-enzyme-linked immunosorbent assay and graft- inoculations onto Ipomoea setosa. A net benefit of 38% in storage root yield was realised from using PT materials in this study. Conversely, in a similar study previously conducted at Kerevat, Papua New Guinea (PNG), a net deficit of 36% was realised. This reinforced our finding that the response to pathogen testing was cultivar dependent and that the PNG cultivars in these studies generally exhibited increased tolerance to the endemic viruses present at the respective trial sites as manifested in their lack of response from the use of PT clones. They may be useful sources for future resistance breeding efforts. Nonetheless, the potential economic gain from using PT stocks necessitates the use of pathogen testing on virus-susceptible commercial cultivars.
Keyword Cultivar decline
Pathogen testing
Sweetpotato viruses
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Agriculture and Food Sciences
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