caa a22 4500 445322993 CHVBK 20180317142710.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10681-010-0269-x doi (NATIONALLICENCE)springer-10.1007/s10681-010-0269-x Characterization of two new Puccinia graminis f. sp. tritici races within the Ug99 lineage in South Africa [Elektronische Daten] [Botma Visser, Liezel Herselman, Robert Park, Haydar Karaoglu, Cornelia Bender, Zacharias Pretorius] Two new races of the wheat (Triticum aestivum L.) stem rust pathogen, representing the fifth and sixth variants described within the Ug99 lineage, were detected in South Africa. Races TTKSP and PTKST (North American notation) were detected in 2007 and 2009, respectively. Except for Sr24 virulence, race TTKSP is phenotypically identical to TTKSF, a commonly detected race of Puccinia graminis f. sp. tritici (Pgt) in South Africa. PTKST is similar to TTKSP except that it produces a lower infection type on the Sr21 differential and has virulence for Sr31. Simple sequence repeat (SSR) analysis confirmed the genetic relationship amongst TTKSF, TTKSP, PTKST and TTKSK (Ug99). TTKSK, PTKST and TTKSF grouped together with 99% similarity, while sharing 88% genetic resemblance with TTKSP. These four races in turn shared only 31% similarity with other South African races. It is proposed that both TTKSP and PTKST represent exotic introductions of Pgt to South Africa. Springer Science+Business Media B.V., 2010 Pathotype nationallicence Stem rust nationallicence Triticum aestivum nationallicence Wheat nationallicence TTKSK nationallicence Visser Botma Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut Herselman Liezel Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut Park Robert Plant Breeding Institute Cobbitty, The University of Sydney, Private Mail Bag 11, 2570, Camden, NSW, Australia aut Karaoglu Haydar Plant Breeding Institute Cobbitty, The University of Sydney, Private Mail Bag 11, 2570, Camden, NSW, Australia aut Bender Cornelia Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut Pretorius Zacharias Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut Euphytica Springer Netherlands 179/1(2011-05-01), 119-127 0014-2336 179:1<119 2011 179 10681 https://doi.org/10.1007/s10681-010-0269-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-010-0269-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Visser Botma Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut NATIONALLICENCE 700 1- Herselman Liezel Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut NATIONALLICENCE 700 1- Park Robert Plant Breeding Institute Cobbitty, The University of Sydney, Private Mail Bag 11, 2570, Camden, NSW, Australia aut NATIONALLICENCE 700 1- Karaoglu Haydar Plant Breeding Institute Cobbitty, The University of Sydney, Private Mail Bag 11, 2570, Camden, NSW, Australia aut NATIONALLICENCE 700 1- Bender Cornelia Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut NATIONALLICENCE 700 1- Pretorius Zacharias Department of Plant Sciences, University of the Free State, P.O. Box 339, 9300, Bloemfontein, South Africa aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 179/1(2011-05-01), 119-127 0014-2336 179:1<119 2011 179 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer