Publications by authors named "Thomas G Fetch"
Wheat line Tr129 is resistant to stem rust, caused by Puccinia graminis f. sp. tritici (Pgt).
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- Stem rust is a significant disease affecting cultivated oats, primarily controlled in North America through host resistance from a limited number of resistance genes.
- Researchers focused on a specific resistance gene to develop high-density genetic maps and to create efficient DNA markers for selecting resistant oat varieties.
- Their findings included identifying key markers linked to the resistance gene, which were successfully converted into KASP assays that can accurately predict the presence of the resistance gene in various oat lines and cultivars.
Article Synopsis
- * Pg13 is crucial for stem rust resistance in North American oat cultivars and will aid in routine selection practices like gene pyramiding and backcrosses.
- * High-density linkage maps and genome-wide associations confirmed Pg13's location at approximately 67.7 cM on linkage group Mrg18, coinciding with specific translocation breakpoints and other resistance genes, with reliable KASP assays created for breeding use.
Background: Puccinia graminis f. sp. tritici (Pgt) race TTKSK and its lineage pose a threat to barley production world-wide justifying the extensive efforts to identify, clone, and characterize the rpg4-mediated resistance locus (RMRL), the only effective resistance to virulent Pgt races in the TTKSK lineage.
View Article and Find Full Text PDFFrequent emergence of new variants in the Puccinia graminis f. sp. tritici Ug99 race group in Kenya has made pathogen survey a priority.
View Article and Find Full Text PDFWheat stem rust resistance gene SrWeb is an allele at the Sr9 locus that confers resistance to Ug99. Race TTKSK (Ug99) of Puccinia graminis f. sp.
View Article and Find Full Text PDFNew races of wheat stem rust, namely TTKSK (Ug99) and its variants, pose a threat to wheat production in the regions where they are found. The accession of the wheat cultivar Webster (RL6201) maintained at the Cereal Research Centre in Winnipeg, Canada, shows resistance to TTKSK and other races of stem rust. The purpose of this study was to study the inheritance of seedling resistance to stem rust in RL6201 and genetically map the resistance genes using microsatellite (SSR) markers.
View Article and Find Full Text PDFBarley yellow dwarf virus (BYDV) infection occurs frequently in barley in the Upper Midwest region of the United States; however, the impact of this disease on the yield and quality of malting cultivars has not been adequately addressed. Studies were conducted at Fargo, North Dakota (from 1989 to 1990) to determine the effect of BYDV infection on yield and malt quality parameters in barley. Three malting cultivars varying in yield potential and malting characteristics were artificially inoculated at the seedling stage with a North Dakota BYDV isolate of the PAV serotype.
View Article and Find Full Text PDFSpot blotch, caused by Cochliobolus sativus, is a common foliar disease of barley that is controlled primarily through the deployment of resistant cultivars. Resistance is often assessed at the seedling and adult plant stages, but currently no comprehensive visual scale exists that describes the full spectrum of infection responses (IRs) occurring on barley. From the evaluation of a diverse collection of barley germ plasm and C.
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