High genetic diversity of Fusarium circinatum associated with the first outbreak of pitch canker on Pinus patula in South Africa

dc.contributor.authorFru, Felix Fon
dc.contributor.authorSteenkamp, Emma Theodora
dc.contributor.authorWingfield, Michael J.
dc.contributor.authorRoux, Jolanda
dc.date.accessioned2019-08-06T11:11:58Z
dc.date.issued2019
dc.description.abstractThe disease known as pitch canker results from infection of Pinus species by the fungus Fusarium circinatum. This fungus also causes a serious root disease of Pinus seedlings and cuttings in forestry nurseries. Pinus radiata and P. patula are especially susceptible to the pathogen, but there are no records of pitch canker on P. patula in established plantations. To date, only planting material of this tree species in nurseries or in plantations at the time of establishment have been infected by F. circinatum. Symptoms of pitch canker have recently emerged in an established P. patula plantation in South Africa and this study sought to determine whether the symptoms were caused by F. circinatum. Isolates from cankers were identified as F. circinatum using morphology and DNA-based diagnostic markers. Microsatellite markers were then used to determine the genetic diversity of a collection of 52 isolates. The entire population included 17 genotypes representing 30 alleles, with a greater number of genotypes collected from younger (three- to six-year-old) than older (12- to 19-year-old) trees. Both mating types of F. circinatum were present, but no evidence of sexual recombination was inferred from population genetic analyses. This is the first record globally of pitch canker on P. patula trees in managed plantations. It is of significant concern to South Africa, where P. patula is the most important Pinus species utilised for plantation forestry.en_ZA
dc.description.departmentBiochemistryen_ZA
dc.description.departmentForestry and Agricultural Biotechnology Institute (FABI)en_ZA
dc.description.departmentGeneticsen_ZA
dc.description.departmentMicrobiology and Plant Pathologyen_ZA
dc.description.departmentPlant Production and Soil Scienceen_ZA
dc.description.embargo2019-09-12
dc.description.librarianhj2019en_ZA
dc.description.sponsorshipMembers of the Tree Protection Cooperative Programme (TPCP) and the Department of Science and Technology (DST) and National Research Foundation (NRF) Centre of Excellence in Tree Health Biotechnology (CTHB) of South Africa.en_ZA
dc.description.urihttp://www.tandfonline.com/loi/tsfs20en_ZA
dc.identifier.citationFelix F Fru, Emma T Steenkamp, Michael J Wingfield & Jolanda Roux (2019) High genetic diversity of Fusarium circinatum associated with the first outbreak of pitch canker on Pinus patula in South Africa, Southern Forests: a Journal of Forest Science, 81:1, 69-78, DOI: 10.2989/20702620.2018.1496312.en_ZA
dc.identifier.issn2070-2620 (print)
dc.identifier.issn2070-2639 (online)
dc.identifier.other10.2989/20702620.2018.1496312
dc.identifier.urihttp://hdl.handle.net/2263/70896
dc.language.isoenen_ZA
dc.publisherNISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group)en_ZA
dc.rights© NISC (Pty) Ltd. This is an electronic version of an article published in Southern Forests , vol. 81, no. 1, pp. 69-78, 2019. doi : 10.2989/20702620.2018.1496312. Southern Forests is available online at : http://www.tandfonline.comloi/tsfs20.en_ZA
dc.subjectMicrosatellite markersen_ZA
dc.subjectPlantation forestryen_ZA
dc.subjectPopulation geneticsen_ZA
dc.subjectTree diseaseen_ZA
dc.titleHigh genetic diversity of Fusarium circinatum associated with the first outbreak of pitch canker on Pinus patula in South Africaen_ZA
dc.typePostprint Articleen_ZA

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