Characterization of two new Puccinia graminis f. sp tritici races within the Ug99 lineage in South Africa

被引：49

作者：

Visser, Botma ^{[1
]}

Herselman, Liezel ^{[1
]}

Park, Robert F. ^{[2
]}

Karaoglu, Haydar ^{[2
]}

Bender, Cornelia M. ^{[1
]}

Pretorius, Zacharias A. ^{[1
]}

机构：

[1] Univ Orange Free State, Dept Plant Sci, ZA-9300 Bloemfontein, South Africa

[2] Univ Sydney, Plant Breeding Inst Cobbitty, Camden, NSW 2570, Australia

来源：

EUPHYTICA | 2011年 / 179卷 / 01期

关键词：

Pathotype; Stem rust; Triticum aestivum; Wheat; TTKSK; WHEAT; RESISTANCE; VIRULENCE; TTKS; GENETICS; SR24; SR31;

D O I：

10.1007/s10681-010-0269-x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

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.

引用

页码：119 / 127

页数：9

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