dc.contributor.author |
Eshetu, Firehiwot Birhane
|
|
dc.contributor.author |
Barnes, Irene
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|
dc.contributor.author |
Nahrung, Helen F.
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|
dc.contributor.author |
Fitza, Katrin N.E.
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|
dc.contributor.author |
Meurisse, Nicolas
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|
dc.contributor.author |
Slippers, Bernard
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|
dc.date.accessioned |
2024-05-13T07:00:17Z |
|
dc.date.available |
2024-05-13T07:00:17Z |
|
dc.date.issued |
2023-05 |
|
dc.description.abstract |
The nematode Deladenus siricidicola is used for the biocontrol of the invasive woodwasp, Sirex noctilio, that infests Pinus globally. In New Zealand, D. siricidicola was accidentally introduced along with S. noctilio, after which its potential for biological control was realized in the 1960s. Additional strains of the nematode were collected from across its Eurasian distribution for the development of a biological control program in Australia in the 1970s. A strain from Hungary (Sopron) was originally selected for large-scale releases and later replaced by a strain that was collected from previously released populations in Tasmania (Kamona). The Kamona strain is still used today in biological control programs in Australia, South Africa and South America. Despite the long history of biocontrol, the nematode’s genetic diversity has not been studied in Australia and New Zealand. We assessed the population genetic diversity and structure of D. siricidicola in these countries using mitochondrial COI sequence data and 12 microsatellite markers. We also compared our data to that of a recent global diversity study. The results show a higher than expected diversity of the nematode in these Australasian countries, especially Australia. Three lineages previously defined from North America (A), Southern Hemisphere (B) and Spain (C) were identified in Australia (A, B, C) and New Zealand (A, B). A previously undescribed lineage (D), was identified in both Australia and New Zealand. Despite the evidence of admixture with other lineages, including the widely distributed biocontrol lineage (B; Kamona), lineage D remained distinguishable and dominant in these populations, even where Kamona has been released intensively for decades. Surprisingly, the results also revealed a shared history between populations in New Zealand and North America. These findings highlight the importance of understanding and monitoring genetic diversity in biological control programs and hold opportunities to improve both the selection and deployment of this nematode for the management of diverse populations of S. noctilio. |
en_US |
dc.description.department |
Biochemistry |
en_US |
dc.description.department |
Forestry and Agricultural Biotechnology Institute (FABI) |
en_US |
dc.description.department |
Genetics |
en_US |
dc.description.department |
Microbiology and Plant Pathology |
en_US |
dc.description.librarian |
hj2024 |
en_US |
dc.description.sdg |
SDG-15:Life on land |
en_US |
dc.description.sponsorship |
The Australian National Sirex Co-ordinate Committee (NSCC) and the Tree Protection Co-operative Programme (TPCP) at the Forestry and Agricultural Biotechnology Institute (FABI) of the University of Pretoria, South Africa. |
en_US |
dc.description.uri |
http://www.elsevier.com/locate/ybcon |
en_US |
dc.identifier.citation |
Eshetu, F.B., Barnes, I., Nahrung, H.F. et al. 2023, 'Unexpected diversity in historical biological control programs: Population genetics of the nematode Deladenus siricidicola in Australia and New Zealand', Biological Control, vol. 180, art. 105183, pp. 1-12, doi : 10.1016/j.biocontrol.2023.105183. |
en_US |
dc.identifier.issn |
1049-9644 (print) |
|
dc.identifier.issn |
1090-2112 (online) |
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dc.identifier.other |
10.1016/j.biocontrol.2023.105183 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/95910 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.rights |
© Published by 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. 180, art. 105183, pp. 1-12, doi : 10.1016/j.biocontrol.2023.105183. |
en_US |
dc.subject |
Sirex noctilio woodwasp |
en_US |
dc.subject |
Kamona strain |
en_US |
dc.subject |
Sopron strain |
en_US |
dc.subject |
Genetic diversity |
en_US |
dc.subject |
Admixture |
en_US |
dc.subject |
Biological control |
en_US |
dc.subject |
SDG-15: Life on land |
en_US |
dc.title |
Unexpected diversity in historical biological control programs: Population genetics of the nematode Deladenus siricidicola in Australia and New Zealand |
en_US |
dc.type |
Postprint Article |
en_US |