Show simple item record

Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria

dc.contributor.authorOdu, B.O.
dc.contributor.authorAsiedu, Robert
dc.contributor.authorShoyinka, S.A.
dc.contributor.authorHughes, J.A.
dc.date.accessioned2019-12-04T11:15:46Z
dc.date.available2019-12-04T11:15:46Z
dc.date.issued2006
dc.identifier.citationOdu, B.O., Asiedu, R., Shoyinka, S.A. & Hughes, J.A. (2006). Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria. Journal of Phytopathology, 154(11‐12), 716-724.
dc.identifier.issn0931-1785
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3026
dc.description.abstractStudies were made to identify sources of resistance to yam viruses in Dioscorea alata. Forty genotypes of D. alata were evaluated in both the field and in the screenhouse for reactions to the yam viruses: Yam mosaic virus (YMV), genus Potyvirus; Dioscorea alata virus (DAV), genus Potyvirus; Cucumber mosaic virus (CMV), genus Cucumovirus; and Dioscorea alata bacilliform virus (DaBV), genus Badnavirus. The D. alata genotypes were planted in the field and subsequently scored for virus symptom severity. All the genotypes were also planted in an insect-proofed screenhouse, and challenged mechanically and by vectors for susceptibility to each of the viruses. Analysis of variance (anova) of the symptom severity scores showed that the genotypes responded differently (P < 0.01) to virus disease in the field. Field evaluation also showed that TDa 291 (a landrace genotype from Puerto Rico), TDa 87/01091, TDa 96-4, TDa 95-163 and TDa 289 from Nigeria, and TDa 95-25 (a landrace genotype from Ghana), had a low virus disease symptom rating. Overall screening results showed that two D. alata genotypes (TDa 289 and TDa 291) are good sources of resistance to YMV, DAV and CMV, and that they are tolerant to DaBV.
dc.language.isoen
dc.subjectDioscorea Alata
dc.subjectGenotypes
dc.subjectYam Mosaic Virus
dc.subjectGenus Potyvirus
dc.subjectCucumber Mosaic Virus
dc.subjectScreenhouse
dc.subjectResistance
dc.titleScreening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitute of Agricultural Research and Training, Nigeria
cg.contributor.affiliationWorld Vegetable Center
cg.coverage.regionAfrica
cg.coverage.regionAsia
cg.coverage.regionWest Africa
cg.coverage.regionEast Asia
cg.coverage.countryNigeria
cg.coverage.countryTaiwan
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectYam
cg.iitasubjectDisease Control
cg.iitasubjectFarm Management
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectNutrition
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectAgribusiness
cg.iitasubjectGenetic Improvement
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.iitasubjectLivelihoods
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Production
cg.iitasubjectPests Of Plants
cg.accessibilitystatusLimited Access
local.dspaceid94492
cg.identifier.doihttp://dx.doi.org/10.1111/j.1439-0434.2006.01180.x


Files in this item

Thumbnail
Name:
odu-screening-2006.pdf
Size:
113.4Kb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record