The role of soil-borne fungi in potato early dying disease: a study of Verticillium dahliae, V. albo-atrum, and Colletotrichum coccodes in Alberta

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dc.contributor.authorRahman, Atta Ur
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorYevtushenko, Dmytro P.
dc.contributor.supervisorHarding, Michael
dc.date.accessioned2023-06-22T21:27:56Z
dc.date.available2023-06-22T21:27:56Z
dc.date.issued2023
dc.degree.levelMasters
dc.description.abstractThis study investigates potato early dying (PED) disease in southern Alberta caused by soil-borne fungi. The species identity, incidence and abundance of Verticillium dahliae and V. albo-atrum, two fungi associated with PED, were examined through qPCR of soil samples collected from 62 fields in 2020 and 2021. Verticillium dahliae was found in 71% and 45% of the fields, respectively, while V. albo-atrum was detected in only one field in 2020. In the summer of 2021 and 2022, selected fields were surveyed to assess PED severity and the presence of V. dahliae in plant tissues. Potato fields with high V. dahliae inoculum levels in the soil showed more PED symptoms and lower yields; however, some low inoculum fields displayed PED symptoms, suggesting other factors might contribute to the PED complex. Interestingly, Colletotrichum coccodes was detected along with V. dahliae in 59% of plant samples collected in 2021 and 41% in 2022.
dc.identifier.urihttps://hdl.handle.net/10133/6509
dc.language.isoen
dc.proquest.subject0480
dc.proquest.subject0410
dc.proquest.subject0307
dc.proquestyesYes
dc.publisherLethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences
dc.publisher.departmentDepartment of Biological Sciences
dc.publisher.facultyArts and Science
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)
dc.subjectVerticillium wilt
dc.subjectpotato disease
dc.subjectplant pathology
dc.subjectdisease complex
dc.subjectfield survey
dc.subjectsoil fungi
dc.subjectqPCR analysis
dc.subject.lcshVerticillium dahliae--Research
dc.subject.lcshVerticillium wilt diseases--Research
dc.subject.lcshPlant diseases
dc.subject.lcshSoil fungi--Research
dc.subject.lcshPotatoes--Diseases and pests--Research--Alberta
dc.subject.lcshVerticillium albo-atrum--Research
dc.subject.lcshColletotrichum coccodes--Research
dc.subject.lcshPolymerase chain reaction--Diagnostic use
dc.subject.lcshDissertations, Academic
dc.titleThe role of soil-borne fungi in potato early dying disease: a study of Verticillium dahliae, V. albo-atrum, and Colletotrichum coccodes in Alberta
dc.typeThesis
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