Distribution of Puccinia striiformis f. sp. tritici races and virulence in wheat growing regions of Kenya from 1970 to 2014

dc.creatorWamalwa, M.
dc.creatorWanyera, R.
dc.creatorRodriguez-Algaba, J.
dc.creatorBoyd, L.A.
dc.creatorOwuoche, J.O.
dc.creatorOgendo, J.
dc.creatorBhavani, S.
dc.creatorUauy, C.
dc.creatorJustesen, A.F.
dc.creatorHovmoller, M.S.
dc.date2023-01-14T01:20:14Z
dc.date2023-01-14T01:20:14Z
dc.date2022
dc.date.accessioned2023-07-17T20:10:04Z
dc.date.available2023-07-17T20:10:04Z
dc.identifierhttps://hdl.handle.net/10883/22406
dc.identifier10.1094/PDIS-11-20-2341-RE
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7514153
dc.descriptionStripe rust, caused by the fungal pathogen Puccinia striiformis f. sp. tritici, is a major threat to wheat (Triticum spp.) production worldwide. The objective of this study was to determine the virulence of P. striiformis f. sp. tritici races prevalent in the main wheat growing regions of Kenya, which includes Mt. Kenya, Eastern Kenya, and the Rift Valley (Central, Southern, and Northern Rift). Fifty P. striiformis f. sp. tritici isolates collected from 1970 to 1992 and from 2009 to 2014 were virulence phenotyped with stripe rust differential sets, and 45 isolates were genotyped with sequence characterized amplified region (SCAR) markers to differentiate the isolates and identify aggressive strains PstS1 and PstS2. Virulence corresponding to stripe rust resistance genes Yr1, Yr2, Yr3, Yr6, Yr7, Yr8, Yr9, Yr17, Yr25, and Yr27 and the seedling resistance in genotype Avocet S were detected. Ten races were detected in the P. striiformis f. sp. tritici samples obtained from 1970 to 1992, and three additional races were detected from 2009 to 2014, with a single race being detected in both periods. The SCAR markers detected both Pst1 and Pst2 strains in the collection. Increasing P. striiformis f. sp. tritici virulence was found in the Kenyan P. striiformis f. sp. tritici population, and different P. striiformis f. sp. tritici race groups were found to dominate different wheat growing regions. Moreover, recent P. striiformis f. sp. tritici races in East Africa indicated possible migration of some race groups into Kenya from other regions. This study is important in elucidating P. striiformis f. sp. tritici evolution and virulence diversity and useful in breeding wheat cultivars with effective resistance to stripe rust.
dc.description701-710
dc.languageEnglish
dc.publisherAmerican Phytopathological Society
dc.relationNutrition, health & food security
dc.relationPlant Health
dc.relationGenetic Innovation
dc.relationSustainable Crop Production Research for International Development
dc.relationBiotechnology and Biological Sciences Research Council
dc.relationhttps://hdl.handle.net/10568/129176
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source2
dc.source106
dc.source0191-2917
dc.sourcePlant Disease
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectCereals and Grains
dc.subjectPathogen Diversity
dc.subjectPuccinia f. sp. tritici
dc.subjectStripe Rust
dc.subjectYellow Rust
dc.subjectCEREALS
dc.subjectFIELD CROPS
dc.subjectFUNGI
dc.subjectPATHOGENICITY
dc.subjectRUSTS
dc.subjectTRITICUM AESTIVUM
dc.subjectWheat
dc.titleDistribution of Puccinia striiformis f. sp. tritici races and virulence in wheat growing regions of Kenya from 1970 to 2014
dc.typeArticle
dc.typePublished Version
dc.coverageKenya
dc.coverageSt. Paul, MN (USA)


Este ítem pertenece a la siguiente institución