Show simple item record

Characterization of some fungal pathogens causing anthracnose disease on yam in Cross River State, Nigeria

dc.contributor.authorOkon, N.I.
dc.contributor.authorMarkson, A.A.A.
dc.contributor.authorOkon, E.I.
dc.contributor.authorIta, E.E.
dc.contributor.authorUyoh, E.A.
dc.contributor.authorEne-Obong, E.O.E.
dc.contributor.authorNtui, V.O.
dc.date.accessioned2022-08-15T09:09:27Z
dc.date.available2022-08-15T09:09:27Z
dc.date.issued2022
dc.identifier.citationOkon, N.I., Markson, A.A.A., Okon, E.I., Ita, E.E., Uyoh, E.A., Ene-Obong, E.O.E. & Ntui, V.O. (2022). Characterization of some fungal pathogens causing anthracnose disease on yam in Cross River State, Nigeria. PloS ONE, 17(6): : e027060, 1-19.
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7638
dc.description.abstractYam anthracnose is one of the most serious fungal diseases affecting white and water yam production. Screening of available landraces for new sources of durable resistance to the pathogen is a continuous process. In the present study, the pathogens causing anthracnose in Dioscorea alata and Dioscorea rotundata farms in Cross River State yam belt region were characterized. Diseased yam leaves with anthracnose symptoms collected from the farms were used in the isolation, purification and, identification of C. alatae strains using morphological, cultural, and molecular methods. Leaf chlorosis, leaf edge necrosis, blights, dark brown to black leaf spots, shot holes, necrotic vein banding and vein browning were the predominantly observed symptoms. Seven isolates of C. alatae, Ca5, Ca14, Ca16, Ca22, Ca24, Ca32 and Ca34, and one isolate of Lasidioplodia theobromae, Lt1 were found to be associated with yam infection in Cross River State, with Lt1 as the most prevalent, occurring in all the locations. These isolates were classified into four forms which included the slow-growing grey (SGG), the fast-growing grey (FGG), the fast-growing salmon (FGS), and the fast-growing olive (FGO). Sequence analysis of the ITS region revealed <80% nucleotide identity between the isolates and the reference C. gloeosporioides. Pathogenicity test showed that all the isolates displayed typical symptoms of anthracnose disease as were observed in the field, but Lt1 was the most virulent. Inoculation of 20 D. alata and 13 D. rotundata landraces with isolate Lt1, showed that 63.64% of the landraces were susceptible while 36.36%were resistant. D. alata landraces were the most susceptible. This study revealed that anthracnose is prevalent and may assume an epidemic dimension in the yam growing communities of the state. There is need for increased effort in the breeding of yam for anthracnose resistance.
dc.description.sponsorshipNigerian Tertiary Education Trust Fund
dc.format.extent1-19
dc.language.isoen
dc.subjectYams
dc.subjectDioscorea
dc.subjectDiseases
dc.subjectNigeria
dc.titleCharacterization of some fungal pathogens causing anthracnose disease on yam in Cross River State, Nigeria
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationUniversity of Calabar
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubEastern Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidOKON:2022
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Production
cg.iitasubjectYam
cg.journalPLoS ONE
cg.notesOpen Access Journal; Published online: 29 Jun 2022
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1371/journal.pone.0270601
cg.iitaauthor.identifierNtui: 0000-0003-4709-8087
cg.futureupdate.requiredNo
cg.identifier.issue6: : e027060
cg.identifier.volume17


Files in this item

Thumbnail
Name:
U22ArtOkonCharacterizationInth ...
Size:
2.487Mb
Format:
PDF
Description:
Journal Article
View/Open

This item appears in the following Collection(s)

Show simple item record