caa a22 4500 463218469 CHVBK 20180405153204.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s11056-006-9017-4 doi (NATIONALLICENCE)springer-10.1007/s11056-006-9017-4 Testing of selected South African Pinus hybrids and families for tolerance to the pitch canker pathogen, Fusarium circinatum [Elektronische Daten] [J. Roux, B. Eisenberg, A. Kanzler, A. Nel, V. Coetzee, E. Kietzka, M. Wingfield] Plantations of Pinus spp. constitute approximately 50% of the South African forestry industry. The first aim of this study was to develop a reliable inoculation technique to screen Pinus spp., for tolerance to infection by F. circinatum, which threatens pine forestry in South Africa. Inoculation of branches was compared with stem inoculations and we considered the number of branches or trees required to obtain statistically significant results. Furthermore, variation in the susceptibility of some Pinus families, clones and hybrids was considered. Results showed that branch inoculations were closely correlated with those from stem inoculations, and that it is important to consider branch and stem diameters when assessing susceptibility of trees. Subsequent trials using branch inoculations showed significant differences in F. circinatum tolerance amongst a range of pine species and hybrids of potential interest to forestry in South Africa. Significant differences in susceptibility were also found among clones of two P. radiata families. The most tolerant trees were P. elliottii × caribaea and P. patula × oocarpa hybrids, while the most susceptible species were P. patula, P. greggii and hybrids of these two. This is the first trial considering the susceptibility of Pinus hybrids, Pinus clones and some P. patula provenances, and the results indicate excellent potential for breeding for tolerance to pitch canker in South Africa. Application The accurate selection of disease tolerant planting stock for the South African forestry industry is crucially important for the continued sustainability of this important industry. The work described here provides valuable information on an artificial inoculation technique that will assist the industry in screening trees for tolerance to the pitch canker fungus, F. circinatum. It also provides some indication of the relative susceptibility of a number of Pinus spp., hybrids and families currently being evaluated in the country. Springer Science+Business Media B.V., 2006 Forestry nationallicence Fungal disease nationallicence Inoculation nationallicence Resistance nationallicence Screening nationallicence Roux J. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut Eisenberg B. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut Kanzler A. Sappi Forest Research, P.O. Box 473, 3290, Howick, KZN, South Africa aut Nel A. Sappi Forest Research, P.O. Box 473, 3290, Howick, KZN, South Africa aut Coetzee V. Komatiland Forest Research, P.O. Box 574, 1260, Sabie, Mpumalanga, South Africa aut Kietzka E. Mondi Business Paper, P.O. Box 179, Pietermaritzburg, KZN, South Africa aut Wingfield M. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut New Forests Kluwer Academic Publishers 33/2(2007-03-01), 109-123 0169-4286 33:2<109 2007 33 11056 https://doi.org/10.1007/s11056-006-9017-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11056-006-9017-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Roux J. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut NATIONALLICENCE 700 1- Eisenberg B. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut NATIONALLICENCE 700 1- Kanzler A. Sappi Forest Research, P.O. Box 473, 3290, Howick, KZN, South Africa aut NATIONALLICENCE 700 1- Nel A. Sappi Forest Research, P.O. Box 473, 3290, Howick, KZN, South Africa aut NATIONALLICENCE 700 1- Coetzee V. Komatiland Forest Research, P.O. Box 574, 1260, Sabie, Mpumalanga, South Africa aut NATIONALLICENCE 700 1- Kietzka E. Mondi Business Paper, P.O. Box 179, Pietermaritzburg, KZN, South Africa aut NATIONALLICENCE 700 1- Wingfield M. Tree Protection Co-operative Programme (TPCP), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, 0002, Pretoria, South Africa aut NATIONALLICENCE 773 0- New Forests Kluwer Academic Publishers 33/2(2007-03-01), 109-123 0169-4286 33:2<109 2007 33 11056 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer