Tolerance of Pinus patula full-sib families to Fusarium circinatum in a greenhouse study

dc.contributor.authorMitchell, R.G. (Richard Glen)
dc.contributor.authorWingfield, Michael J.
dc.contributor.authorSteenkamp, Emma Theodora
dc.contributor.authorCoutinho, Teresa A.
dc.date.accessioned2016-10-18T09:07:01Z
dc.date.available2016-10-18T09:07:01Z
dc.date.issued2012
dc.description.abstractThe pitch canker fungus, Fusarium circinatum, has caused large scale mortality of young Pinus patula Schiede & Deppe ex Schltdl. & Cham. seedlings in nurseries in South Africa since 1990. Diseased seedlings have been inadvertently carried to the field, which in turn have died and has reduced stocking below an acceptable level. Tree breeders have suggested that the only long-term solution to limit infection by this pathogen is to identify and deploy tolerant P. patula families. A commonly used technique to identify tolerant clones is to artificially inoculate open-pollinated progeny from orchard clones with F. circinatum under greenhouse conditions. In these trials, large variation in tolerance to the pathogen among seedlings within open-pollinated families was observed and that this could be influenced by the pollen parent. Therefore, identifying individual full-sib families where both parents are known, should improve the identification of tolerant families, which can then be repeated. In this study, cuttings from control-pollinated P. patula seedling hedges were inoculated with F. circinatum in a greenhouse. The results showed large family variation where some of the full-sib families were similar in tolerance to P. elliottii Engelm var. elliottii seedlings. Therefore, it is recommended that breeders focus on identifying specific family combinations that are more tolerant to F. circinatum.en_ZA
dc.description.departmentForestry and Agricultural Biotechnology Institute (FABI)en_ZA
dc.description.departmentMicrobiology and Plant Pathologyen_ZA
dc.description.librarianhb2016en_ZA
dc.description.urihttp://www.tandfonline.com/loi/tsfs20en_ZA
dc.identifier.citationRG Mitchell , MJ Wingfield , ET Steenkamp & TA Coutinho (2012) Tolerance of Pinus patula full-sib families to Fusarium circinatum in a greenhouse study, Southern Forests: a Journal of Forest Science, 74:4, 247-252, DOI: 10.2989/20702620.2012.741788.en_ZA
dc.identifier.issn2070-2620 (print)
dc.identifier.issn2070-2639 (online)
dc.identifier.other10.2989/20702620.2012.741788
dc.identifier.urihttp://hdl.handle.net/2263/57342
dc.language.isoenen_ZA
dc.publisherTaylor and Francisen_ZA
dc.rights© NISC (Pty) Ltd. This is an electronic version of an article published in Southern Forests , vol. 74, no. 4, pp. 247-252, 2012. doi : 10.2989/20702620.2012.741788. Southern Forests is available online at : http://www.tandfonline.comloi/tsfs20.en_ZA
dc.subjectPinus patulaen_ZA
dc.subjectP. elliottiien_ZA
dc.subjectGreenhouse inoculationen_ZA
dc.subjectFusarium circinatumen_ZA
dc.subjectCuttingsen_ZA
dc.titleTolerance of Pinus patula full-sib families to Fusarium circinatum in a greenhouse studyen_ZA
dc.typePostprint Articleen_ZA

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