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Population genetic analysis of Fusarium circinatum in Colombia and Chile
Disseration (MSc (Microbiology))--University of Pretoria, 2024.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2024
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| _version_ | 1867613664401424384 |
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| access_status_str | Open Access |
| author2 | Wingfield, Brenda D. |
| author_browse | Wingfield, Brenda D. |
| author_facet | Wingfield, Brenda D. |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Disseration (MSc (Microbiology))--University of Pretoria, 2024. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/96621 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:44.581Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/96621 Population genetic analysis of Fusarium circinatum in Colombia and Chile Wingfield, Brenda D. CallinCeriani@gmail.com Steenkamp, Emma Theodora Wingfield, Michael J. Ceriani, Callin UCTD Sustainable Development Goals (SDGs) Population genetics Fusarium circinatum South America Reproductive mode Microsatellites Pine pitch canker Population structure Plantation forestry Disseration (MSc (Microbiology))--University of Pretoria, 2024. Fusarium circinatum is a fungal pathogen of Pinus species. The fungus causes a disease known as pine pitch canker on Pinus species. The emergence of Fusarium circinatum as a significant threat to Pinus species in commercial forestry worldwide sparked extensive research into its biology, ecology, and epidemiology. Despite considerable progress in understanding its global population biology and genetic diversity, a gap in knowledge regarding its populations in South America became apparent. Especially with reports of both mating types. This led to a focused investigation into the population biology of F. circinatum in two South American countries, Chile and Colombia. In Colombia, the study revealed a clonal population predominantly composed of 116 MAT 1-1 isolates, indicating limited genetic diversity. Moreover, comparisons between historical nursery samples and more recent field isolates suggested minimal differentiation over time, implying persistent gene flow within the population. Interestingly, the population structure analysis hinted at three distinct introductions of the pathogen into the country. Similarly, in Chile, the population exhibited a clonal nature, with only the MAT 1-2 mating type identified among the 71 nursery isolates. The population structure analysis pointed to two separate sources of inoculum introduction of the pathogen. Notably, low differentiation levels and substantial gene flow were observed among nurseries, indicating the simultaneous spread of a few dominant clones between and within the different nurseries. These findings underscore the widespread and persistent threat posed by Fusarium circinatum to pine forests. By enhancing our understanding of its population dynamics, this study enables the development of more targeted and effective preventative and management strategies in these regions. This research was funded by the South African Department of Science and Innovation’s (DSI) South African Research Chair Initiative (SARChI) through the research chair of Prof. BD Wingfield (Grant number 98353). Microbiology and Plant Pathology MSc (Microbiology) Unrestricted Faculty of Natural and Agricultural Sciences SDG-08: Decent work and economic growth SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production SDG-13: Climate action SDG-15: Life on land 2024-06-24T13:57:30Z 2024-06-24T13:57:30Z 2024-09 2024-02-24 Dissertation * S2024 http://hdl.handle.net/2263/96621 https://doi.org/10.25403/UPresearchdata.26014546 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Sustainable Development Goals (SDGs) Population genetics Fusarium circinatum South America Reproductive mode Microsatellites Pine pitch canker Population structure Plantation forestry Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title | Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title_full | Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title_fullStr | Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title_full_unstemmed | Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title_short | Population genetic analysis of Fusarium circinatum in Colombia and Chile |
| title_sort | population genetic analysis of fusarium circinatum in colombia and chile |
| topic | UCTD Sustainable Development Goals (SDGs) Population genetics Fusarium circinatum South America Reproductive mode Microsatellites Pine pitch canker Population structure Plantation forestry |
| url | http://hdl.handle.net/2263/96621 https://doi.org/10.25403/UPresearchdata.26014546 |