Diversity in Puccinia triticina detected on wheat from 2008 to 2010 and the impact of new races on South African wheat germplasm

Terefe, T.; Visser, B.; Herselman, L.; Prins, R.; Negussie, T.; Kolmer, J. A.; Pretorius, Z. A.

doi:10.1007/s10658-013-0368-3

Cited by 15 publications

(7 citation statements)

References 23 publications

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“…Both 3SA145 and 3SA248 showed strong statistical differences and better adaption in their germination and early germ tube growth rate at 35 °C compared to the older race 3SA144. These differences may have contributed to the dominance of 3SA145 (17.9 to 60.5% frequency 2012-2016) in recent rust surveys in SA when compared with 3SA144 (1.6 to 6.7%) (Terefe et al 2014;Boshoff et al 2018). To support this statement more of the older SA wheat leaf rust races should be included in future studies.…”

Section: Discussionmentioning

confidence: 98%

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Yekelo

Rothmann

Bender

et al. 2019

Cereal Research Communications

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Triticale is derived from a cross between wheat and rye and the leaf rust pathogen of wheat, Puccinia triticina (Pt), and that of rye, P. recondita sensu stricto (Pr), can potentially cause disease in this crop. Recent studies showed that wheat rust fungi could adapt to warmer temperatures. In this paper, we report on the comparative virulence of three Pt races and one Pr isolate (all were collected in South Africa) on triticale as well as their in vitro response to temperature. Seedling infection types (SITs) of 169 triticale entries to Pt races 3SA144 (North American code SDDN), 3SA145 (CCPS) and 3SA248 (CFPS) and Pr isolate UVPr2 revealed that 3SA144 is the most virulent with 106 triticale entries found susceptible to this race. The three Pt races were avirulent to the four rye cultivars included as controls. UVPr2 was avirulent on all the triticale entries and 49 entries were considered resistant to the Pt races tested. Freshly harvested urediniospores of the above isolates were tested at constant temperature regimes of 10 °C, 22.5 °C and 35 °C to study germination characteristics. Mean urediniospore germination percentages as determined for 3SA144 (61.3%) and UVPr2 (62.6%) were significantly lower when compared to 3SA145 (83.7%) and 3SA248 (84.9%). Race 3SA144 was most sensitive to the higher temperature regime of 35 °C (5.2% germination). Among the investigated races, 3SA144 showed significantly lower mean germ tube elongation rates at all three incubation temperatures. This is the first report of differences in temperature adaptation between Pt races from SA.

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Section: Discussionmentioning

confidence: 98%

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Yekelo

Rothmann

Bender

et al. 2019

Cereal Research Communications

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“…It is also known to express a consistently high level of adult plant resistance to stripe rust, which is linked to four quantitative trait loci (QTL) (Ramburan et al, 2004; Prins et al, 2011) including the well‐documented Lr34/Yr18 gene complex (Agenbag et al, 2012). This gene complex additionally confers a slow rusting phenotype in adult plants to most P. triticina pathotypes present in South Africa (Terefe et al, 2014). Furthermore, Kariega was initially postulated to contain the leaf rust seedling resistance genes Lr1 and Lr3a (Pretorius et al, 2007), but subsequent studies by Prins et al (2011) confirmed the presence of Lr3bg , which is resistant to some of the prevalent leaf rust races in South Africa (Terefe et al, 2014).…”

Section: Methodsmentioning

confidence: 99%

“…This gene complex additionally confers a slow rusting phenotype in adult plants to most P. triticina pathotypes present in South Africa (Terefe et al, 2014). Furthermore, Kariega was initially postulated to contain the leaf rust seedling resistance genes Lr1 and Lr3a (Pretorius et al, 2007), but subsequent studies by Prins et al (2011) confirmed the presence of Lr3bg , which is resistant to some of the prevalent leaf rust races in South Africa (Terefe et al, 2014). Kariega is susceptible to most local P. graminis f. sp.…”

Section: Methodsmentioning

confidence: 99%

Registration of Five Spring Wheat Lines Resistant to Russian Wheat Aphid, Stem Rust (Ug99), Leaf Rust, and Stripe Rust

Tolmay

Sydenham

Boshoff

et al. 2015

J of Plant Registrations

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, and RWASA3) and another with Sr35 (resistant to the Ug99 race group). Phenotypic screening for RWA resistance (using biotype RWASA1) and marker assisted selection for rust resistance genes including Sr35, Lr34/Yr18/Sr57/Pm38/Sb1/ Ltn1, and QYr.sgi-2B.1 were used to identify the targeted traits during selection. The unique combination of aphid and rust resistance, medium to high yield potential, and good end-use quality makes these wheat lines useful for wheat breeders with an interest in these resistance traits.

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“…Researchers in Nepal, Bangladesh, Pakistan, South Africa, and others countries have reported races using both their own nomenclatures and the North American Nomenclature. However, breeders from India and Australia are still using their own binomial systems of nomenclature Terefe et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Physiologic specialization of Puccinia triticina Erikss. and effectiveness of Lr-genes in the south of Ukraine during 2013-2014

Babayants

Gorash

et al. 2015

Chilean J. Agric. Res.

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Leaf rust is the most widespread and frequently occurring fungal disease of wheat (Triticum aestivum L.) in Ukraine and worldwide. The information about the effectiveness of Lr-genes and also the consequent monitoring of virulence dynamics is necessary for the successful wheat breeding for leaf rust resistance. In 2013-2014 pathotype composition and virulence analysis was studied both on the standard differential set and on the North American System of Nomenclature. According to the standard differential set, 12 phenotypes were identified, of which the most common were 77 (75%) and 144 (6%). A total of 40 phenotypes were identified on the North American Nomenclature. Phenotypes TGTT (24%) and TJTT (8%) were the most frequent, TRTT (1.5%) and TSTT (1.5%) were within the broadest spectrum of virulence among the isolates found in the south of Ukraine. For virulence analysis we used wheat lines of 'Thatcher' that are near-isogenic for 24 leaf rust resistance genes and additionally four cultivars/lines. No virulence to Lr19 was found, whereas increasing virulence to Lr9 was detected (13%). Low frequency of virulence was observed to Lr29 (11%) and Lr47 (21%), high level of virulence was detected to other genes. The effectiveness of 53 known Lr-genes was studied at the seedling and the adult plant stages. Most of them were not effective against leaf rust. Genes Lr9, Lr19, Lr29, and Lr47 were highly effective both at the seedling stage and at adult plant stage. Genes Lr24, Lr42, Lr50, Lr51, and Lr56 were effective only at the adult plant stage.

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Diversity in Puccinia triticina detected on wheat from 2008 to 2010 and the impact of new races on South African wheat germplasm

Cited by 15 publications

References 23 publications

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Response of an International Triticale Collection toPuccinia triticinaandPuccinia reconditasensu stricto and Assessment of Temperature Sensitivity in Leaf Rust Isolates

Registration of Five Spring Wheat Lines Resistant to Russian Wheat Aphid, Stem Rust (Ug99), Leaf Rust, and Stripe Rust

Physiologic specialization of Puccinia triticina Erikss. and effectiveness of Lr-genes in the south of Ukraine during 2013-2014

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