The global diversity of Deladenus siricidicola in native and non-native populations

Show simple item record Fitza, Katrin N.E. Garnas, Jeffrey R. Lombardero, Maria J. Ayres, Matthew P. Krivak-Tetley, Flora E. Ahumada, Rodrigo Hurley, Brett Phillip Wingfield, Michael J. Slippers, Bernard 2019-07-29T12:09:20Z 2019-05
dc.description.abstract The nematode Deladenus siricidicola is the primary biological control agent of Sirex noctilio, a globally invading woodwasp pest of Pinus species. Preliminary studies on the diversity of populations of D. siricidicola revealed very low diversity in the Southern Hemisphere where they have been introduced for the purpose of biological control. The potential to augment biocontrol efficacy by increasing genetic diversity in biocontrol programs motivated this study, which investigated the patterns of genetic diversity in D. siricidicola across eight countries, including the presumed native range (Spain), areas of accidental introduction (Canada and the USA) and countries D. siricidicola has been intentionally released (Argentina, Brazil, Chile, New Zealand and South Africa). Nematodes were screened using mitochondrial COI sequence data and twelve microsatellite markers. Analyses of these data identified three distinct lineages from North America (Lineage A), the Southern Hemisphere (Lineage B) and Spain (Lineage C). Strains from Chile were an exception as they appear to represent an admixture of lineages A and B. This suggests a common origin of populations throughout the Southern Hemisphere, with a second introduction from North America into Chile. The introduction into North America is distinct from that in the Southern Hemisphere and probably originated from Europe. It is evident that substantial genetic diversity exists in D. siricidicola globally, which could be exploited to augment the reduced diversity in some populations used in biocontrol programs. en_ZA
dc.description.department Biochemistry en_ZA
dc.description.department Forestry and Agricultural Biotechnology Institute (FABI) en_ZA
dc.description.department Genetics en_ZA
dc.description.department Microbiology and Plant Pathology en_ZA
dc.description.department Zoology and Entomology en_ZA
dc.description.embargo 2020-05-01
dc.description.librarian hj2019 en_ZA
dc.description.sponsorship The University of Pretoria, members of the Tree Protection Co-operative Program (TPCP), South Africa, and USDA Forest Service International Programs. en_ZA
dc.description.uri en_ZA
dc.identifier.citation Fitza, K.N.E., Garnas, J.R., Lombardero, M.J. et al. 2019, 'The global diversity of Deladenus siricidicola in native and non-native populations', Biological Control, vol. 132, pp. 57-65. en_ZA
dc.identifier.issn 1049-9644 (print)
dc.identifier.issn 1090-2112 (online)
dc.identifier.other 10.1016/j.biocontrol.2019.01.014
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2019 Elsevier Inc. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Biological Control. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Biological Control, vol. 132, pp. 57-65, 2019. doi : 10.1016/j.biocontrol.2019.01.014. en_ZA
dc.subject Population genetics en_ZA
dc.subject Invasive pest en_ZA
dc.subject Sirex noctilio en_ZA
dc.subject Deladenus siricidicola en_ZA
dc.subject Biological control en_ZA
dc.title The global diversity of Deladenus siricidicola in native and non-native populations en_ZA
dc.type Postprint Article en_ZA

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