First Report of Puccinia graminis f. sp. tritici Race TTKTT in Ethiopia
2019; American Phytopathological Society; Volume: 104; Issue: 3 Linguagem: Inglês
10.1094/pdis-09-19-1825-pdn
ISSN1943-7692
AutoresNetsanet Bacha Hei, T. Tsegaab, W Getaneh, Tsegaye Girma, C. Obsa, Seyoum Alemu, E. Zerihun, K. Nazari, Ezgi Kurtulus, Handan Kavaz, İzzet Özseven, A. Yoseph,
Tópico(s)Yeasts and Rust Fungi Studies
ResumoHomePlant DiseaseVol. 104, No. 3First Report of Puccinia graminis f. sp. tritici Race TTKTT in Ethiopia PreviousNext DISEASE NOTES OPENOpen Access licenseFirst Report of Puccinia graminis f. sp. tritici Race TTKTT in EthiopiaN. B. Hei, T. Tsegaab, W. Getaneh, T. Girma, C. Obsa, A. Seyoum, E. Zerihun, K. Nazari, E. Kurtulus, H. Kavaz, I. Ozseven, and A. YosephN. B. Hei†Corresponding author: N. B. Hei; E-mail Address: netsanetbacha@yahoo.comhttp://orcid.org/0000-0002-8066-8558Ethiopian Institute of Agricultural Research, Ambo Agricultural Research Center, Ambo, Ethiopia, T. TsegaabEthiopian Institute of Agricultural Research, Ambo Agricultural Research Center, Ambo, Ethiopia, W. GetanehEthiopian Institute of Agricultural Research, Ambo Agricultural Research Center, Ambo, Ethiopia, T. GirmaOromia Agricultural Research Institute, Bore Agricultural Research Center, Bore, Ethiopia, C. ObsaOromia Agricultural Research Institute, Bore Agricultural Research Center, Bore, Ethiopia, A. SeyoumOromia Agricultural Research Institute, Bore Agricultural Research Center, Bore, Ethiopia, E. ZerihunOromia Agricultural Research Institute, Sinana Agricultural Research Center, Bale Robe, Ethiopia, K. NazariTurkey-ICARDA Regional Cereal Rust Research Center, Menemen, Izmir, Turkey, E. KurtulusTurkey-ICARDA Regional Cereal Rust Research Center, Menemen, Izmir, Turkey, H. KavazTurkey-ICARDA Regional Cereal Rust Research Center, Menemen, Izmir, Turkey, I. OzsevenTurkey-ICARDA Regional Cereal Rust Research Center, Menemen, Izmir, Turkey, and A. YosephCIMMYT, Addis Ababa, Ethiopia AffiliationsAuthors and Affiliations N. B. Hei1 † T. Tsegaab1 W. Getaneh1 T. Girma2 C. Obsa2 A. Seyoum2 E. Zerihun3 K. Nazari4 E. Kurtulus4 H. Kavaz4 I. Ozseven4 A. Yoseph5 1Ethiopian Institute of Agricultural Research, Ambo Agricultural Research Center, Ambo, Ethiopia 2Oromia Agricultural Research Institute, Bore Agricultural Research Center, Bore, Ethiopia 3Oromia Agricultural Research Institute, Sinana Agricultural Research Center, Bale Robe, Ethiopia 4Turkey-ICARDA Regional Cereal Rust Research Center, Menemen, Izmir, Turkey 5CIMMYT, Addis Ababa, Ethiopia Published Online:5 Jan 2020https://doi.org/10.1094/PDIS-09-19-1825-PDNAboutSectionsSupplemental ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat Stem rust, caused by Puccinia graminis f. sp. tritici (Pgt), is one of the most important diseases affecting wheat production in Ethiopia, with crop losses of up to 100% during epidemic years (Olivera et al. 2015). In recent years, different virulent races of Pgt have been identified in the major wheat production areas of the country. Ethiopia is considered as a hot spot for the development and spread of new Pgt races (Singh et al. 2006). During the 2018 main cropping season (June to December), wheat rust surveys were undertaken in major wheat growing regions of Ethiopia, and stem rust was recorded in 284 (39%) of the 727 wheat fields surveyed. A total of 333 stem rust samples were analyzed for race identity using 20 North American wheat lines to differentiate Pgt races following the standard protocol described by Jin et al. (2008). Race analysis was undertaken independently at Ambo Agricultural Research Center (AmARC), Ethiopia, and Regional Cereal Rust Research Center (RCRRC), Turkey. The analysis identified seven races, namely, TTTTF, TKTTF, TTKTT, TKKTF, TKPTF, TTRTF, and TTKTF. Of these, TTKTT was detected for the first time in Ethiopia. Race TTKTT was virulent to wheat differential lines containing Sr5, Sr6, Sr7b, Sr8a, Sr9a, Sr9b, Sr9d, Sr9e, Sr9g, Sr10, Sr11, Sr17, Sr21, Sr24, Sr30, Sr31, Sr38, SrTmp, and SrMcN and avirulent on lines with Sr36. This race was identified independently by AmARC and RCRRC in replicated tests from 18 isolates collected in Guji (southern Ethiopia), West Arsi (southeastern Ethiopia), Hararge (eastern Ethiopia), and East Wellega (western Ethiopia) zones of Oromia region and two isolates from East Gojam and South Wollo zones of Amhara region. Race TTKTT was identified from samples collected from commercial wheat varieties Hulluka, Senate, Shorima, Ogolcho, Hidase, and Danda'a. This race was reported in Kenya for the first time in 2014 and belongs to the TTKSK (Ug99) race group (Patpour et al. 2016). TTKTT has the most complex virulence combination of all known Ug99 races, and range expansion out of Kenya is highly significant. This first confirmation of TTKTT in Ethiopia is important because of its striking virulence combinations for SrTmp, Sr24, and Sr31, indicating the increase in virulence and variability in the Ethiopian Pgt population. Among these three genes, Sr24 is a valuable source of resistance that has remained effective in Ethiopia. Detection of TTKTT in Ethiopia is of great concern because a high frequency of widely grown commercial cultivars and advanced breeding lines in Ethiopia are known to possess the Sr24 resistance gene (Hundie et al. 2019). According to Jin et al. (2008), commercial cultivars with resistance based on Sr24, particularly in the East African region, must be viewed with caution in terms of potential stem rust epidemics. The current result also emphasizes the importance of regular monitoring to timely identify new races and utilize this information in screening and identification of effective sources of resistance. Moreover, the result highlighted the need for developing cultivars with combinations of effective resistance genes to enhance their longevity. Alternatively, cultivars with multiple minor genes to achieve durable resistance could be developed. Further spread of race TTKTT is considered likely and requires close monitoring.The author(s) declare no conflict of interest.References:Hundie, B., et al. 2019. Plant Dis. 103:2359. https://doi.org/10.1094/PDIS-07-18-1243-RE Link, ISI, Google ScholarJin, Y., et al. 2008. Plant Dis. 92:923. https://doi.org/10.1094/PDIS-92-6-0923 Link, ISI, Google ScholarOlivera, P., et al. 2015. Phytopathology 105:917. https://doi.org/10.1094/PHYTO-11-14-0302-FI Link, ISI, Google ScholarPatpour, M., et al. 2016. Plant Dis. 100:522. https://doi.org/10.1094/PDIS-06-15-0668-PDN Link, ISI, Google ScholarSingh, R. P., et al. 2006. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources. 1. No. 054. CAB, Wallingford, U.K. Google ScholarThe author(s) declare no conflict of interest. Copyright © 2020 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.DetailsFiguresLiterature CitedRelated Vol. 104, No. 3 March 2020SubscribeISSN:0191-2917e-ISSN:1943-7692 DownloadCaptionPathogenicity of Lasiodiploidia pseudotheobromae in a coffee plant 3 days after inoculation (R. L. Freitas-Lopes et al.). Photo credit: U. P. Lopes. Seedling blight of soybean caused by soilborne pathogens (J. R. Lamichhane et al.). Photo credit: M. I. Chilvers. Metrics Downloaded 2,658 times Article History Issue Date: 3 Mar 2020Published: 5 Jan 2020First Look: 6 Nov 2019Accepted: 4 Nov 2019 Page: 982 InformationCopyright © 2020 The Author(s).This is an open access article distributed under the CC BY 4.0 International license.Keywordsracestem rustwheatThe author(s) declare no conflict of interest.Cited ByFirst Report of Races TKTTP and TKKTP of Puccinia graminis f. sp. tritici with Virulence to Wheat Stem Rust Resistance Gene Sr24 in Turkey and TunisiaKumarse Nazari, Ezgi Kurtulus, Handan Kavaz, Omer M. Ozturk, Yesim Egerci, Ceren Cer, Tarek Jarrahi, Chedi Gasmi, and Ali Kadiroglu27 January 2022 | Plant Disease, Vol. 0, No. 0First Report of Ug99 Race TTKTT of Wheat Stem Rust (Puccinia graminis f. sp. tritici) in IraqKumarse Nazari, Emad M. Al-Maaroof, Ezgi Kurtulus, Handan Kavaz, Dave Hodson, and Izzet Ozseven5 October 2021 | Plant Disease, Vol. 105, No. 9
Referência(s)