Comparative reliability of screening parameters for anthracnose resistance in water yam (Dioscorea alata)

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationNational Root Crops Research Institute, Nigeriaen
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.donorUnited States Agency for International Developmenten
cg.coverage.countryBenin
cg.coverage.countryCôte d'Ivoire
cg.coverage.countryGhana
cg.coverage.countryNigeria
cg.coverage.countryTogo
cg.coverage.iso3166-alpha2BJ
cg.coverage.iso3166-alpha2CI
cg.coverage.iso3166-alpha2GH
cg.coverage.iso3166-alpha2NG
cg.coverage.iso3166-alpha2TG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1094/pdis-06-16-0924-reen
cg.isijournalISI Journalen
cg.issn0191-2917en
cg.issue1en
cg.journalPlant Diseaseen
cg.reviewStatusPeer Reviewen
cg.subject.iitaDISEASE CONTROLen
cg.subject.iitaPLANT DISEASESen
cg.subject.iitaYAMen
cg.volume101en
dc.contributor.authorNwadili, C.O.en
dc.contributor.authorAugusto, J.en
dc.contributor.authorBhattacharjee, Ranjanaen
dc.contributor.authorAtehnkeng, J.en
dc.contributor.authorLópez Montes, Antonio Joséen
dc.contributor.authorOnyeka, T.J.en
dc.contributor.authorKumar, P. Lavaen
dc.contributor.authorAsiedu, Roberten
dc.contributor.authorBandyopadhyay, Ranajiten
dc.date.accessioned2016-11-14T09:48:04Zen
dc.date.available2016-11-14T09:48:04Zen
dc.identifier.urihttps://hdl.handle.net/10568/77732
dc.titleComparative reliability of screening parameters for anthracnose resistance in water yam (Dioscorea alata)en
dcterms.abstractAnthracnose, caused by Colletotrichum gloeosporioides, is one of the major constraints limiting water yam (Dioscorea alata) production in the tropics. In this region, yam anthracnose control is mostly achieved by the deployment of moderately resistant yam genotypes. Therefore, screening for new sources of anthracnose resistance is an important aspect of yam research in the tropics. The reliability and applicability of different yam anthracnose rating parameters has not been fully examined. Disease severity on detached leaves in the laboratory and leaf severity, lesion size, and spore production on whole plants in the greenhouse were used to screen an F1 yam population and correlate screening results with field evaluations. Anthracnose lesion size had the smallest predicted residual means but whole-plant severity and detached-leaf severity had the best variance homogeneity and relatively small predicted residual means. The concordance correlation coefficient (rc) and κ statistic were used to determine the agreement between anthracnose rating parameters and field evaluations. Detached-leaf (rc = 0.95, κ = 0.81) and whole-plant (rc = 0.96, κ = 0.86) evaluations had high positive agreement with field evaluation but spore production (κ = 0.69) and lesion size (κ = 0.57) had moderate positive agreement. These results suggest that all the evaluated rating parameters can be used to successfully screen yam germplasm for anthracnose resistance but lesion size and spore production data may need to be transformed.en
dcterms.accessRightsOpen Access
dcterms.audienceScientistsen
dcterms.available2016-10-25
dcterms.bibliographicCitationNwadili, C.O., Augusto, J., Bhattacharjee, R., Atehnkeng, J., Lopez-Montes, A., Onyeka, T.J., ... & Bandyopadhyay, R. (2016). Comparative reliability of screening parameters for anthracnose resistance in water yam (Dioscorea alata). Plant Disease.en
dcterms.extentp. 209-216en
dcterms.issued2017-01
dcterms.languageen
dcterms.publisherScientific Societiesen
dcterms.subjectcolletetrichum gloeosporioidesen
dcterms.subjectdioscorea alataen
dcterms.subjectyamsen
dcterms.subjectanthracnosisen
dcterms.subjectgreenhousesen
dcterms.subjectgenotypesen
dcterms.subjectdisease managementen
dcterms.typeJournal Article

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