Journal of Phytopathology (2008) 156, 75-78

H. Kajihara, M. Kameya-Iwaki, M. Oonaga, I. Kimura, Y. Sumida, Y. Ooi and S. Ito (2008)
Field studies on cross-protection against Japanese yam mosaic virus in Chinese yam (Dioscorea opposita) with an attenuated strain of the virus
Journal of Phytopathology 156 (2), 75-78
Abstract: An attenuated strain of Japanese yam mosaic virus (JYMV), designated T-3, was evaluated for its cross-protection efficacy against virulent (native) strains of JYMV in Chinese yam (Dioscorea opposita) grown in farmers' fields in Japan. Native strains of JYMV were detected by a polymerase chain reaction-based assay in all the Chinese yam plants grown from virus-free tubers in the first growing season in the fields. In contrast, the virus was detected in only one of fifty plants grown from tubers preinoculated with T-3 during the experiments for 6 years, suggesting that T-3 consistently cross-protected against native JYMV in Chinese yam in the field. Chinese yam plants preinoculated with T-3 produced significantly greater yield of tubers per plant compared with non-inoculated plants.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Shin-ichi Ito

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Japanese yam mosaic virus	Yam (Dioscorea)	Japan