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Showing 1 to 20 of 26 for “"Rust resistance"”.
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Towards Cloning the Leaf Rust Resistance Gene Rph5
Leaf rust caused by Puccinia hordei is an important disease of barley (Hordeum vulgare) in many regions of the world. Yield losses up to 62% have been reported in susceptible cultivars. The Rph5 gene confers resistance to the most prevalent races (8 and 30) of barley leaf rust in the United States. …
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Effects of the Lr34 and Lr46 rust-resistance genes on other diseases of wheat
Lr34 and Lr46 are adult plant resistance genes providing durable resistance to biotrophic diseases of wheat like rusts and powdery mildew. In seedlings, these genes increased susceptibility to Septoria tritici blotch (STB), caused by Zymoseptoria tritici, in near-isogenic lines (NILs) of spring …
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Identification and Mapping of Adult Plant Stripe Rust Resistance in Soft Red Winter Wheat
Since 2000, stripe rust, caused by the fungal pathogen (Puccinia striiformis Westend. f.sp. tritici Eriks.) has resulted in yield losses of wheat (Triticum aestivium L.) in the United States, that exceeded the combined losses of leaf rust (Puccinia triticina Eriks.) and stem rust (Puccinia gramins …
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Dissecting the genetic basis of wheat yellow rust resistance in the NIAB Elite MAGIC population
Yellow rust, caused by the biotrophic fungus Puccinia striiformis f. sp. tritici (Pst), poses a major challenge for wheat breeders and growers globally. The past two decades have seen the rise of Pst populations that are more genetically diverse, more aggressive and that have adapted to warmer …
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Broadening the wheat gene pool for stem rust resistance through genomic-assisted introgressions from Aegilops tauschii
… (2n=2x=14,DD) has provided numerous genes for resistance to diseases and insect pests that attack bread wheat (Triticum aestivum L. (2n=6x=42, AABBDD). Wheat production is currently threatened by broadly virulent races of the ‘Ug99’ lineage of wheat stem rust caused by the fungus, Puccinia …
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Genetic characterization of Rpp1-mediated Asian soybean rust resistance using in-depth transcriptomic and genomic analyses
Asian Soybean Rust, caused by the fungus Phakopsora pachyrhizi, is one of the most destructive diseases affecting soybean yield worldwide. Rpp1 is one of the six known resistant loci that can confer qualitative resistance in soybean resulting in either red-brown lesions with no or limited …
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Combining Common Bean Rust Resistance And Heat Tolerance In Snap Beans (Phaseolus Vulgaris L.) For Eastern Africa
Common bean rust caused by Uromyces appendiculatus (Per.:Pers) Unger, and heat stress limit snap bean production in many tropical and temperate regions. Snap beans that combined broad-spectrum rust resistance with heat tolerance in the same genetic backgrounds were developed and selected for …
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Characterizing soybean rust resistance in Glycine tomentella and effect of temperature and a fungicide on Phakopsora pachyrhizi uredinia production of urediniospores
Soybean rust (Phakopsora pachyrhizi H. Syd. & Syd.) causes significant economic losses in yield in many soybean-growing areas worldwide. Since most if not all commercial soybean cultivars are susceptible, research continues to search and characterize resistance. Perennial Glycine species have many …
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Characterization of Pyrenophora Tritici-Repentis in Wheat and Rye to Study Tan Spot Susceptibility and Insights Into Its Relationship with Stem Rust Resistance
… In order to see the correlation between stem rust resistance and tan spot susceptibility in 1970’s, to know the pathogen virulence profile, and explore the sources of tan spot resistance, we recovered isolates from wheat and rye and evaluated wheat and rye lines with different Ptr isolates. To …
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Identification and Mapping of Resistance to Puccinia striiformis and Puccinia triticina in Soft Red Winter Wheat
Disease resistance is critical in soft red winter wheat (Triticum aestivum L.) cultivars. Leaf rust caused by Puccinia triticina Eriks and stripe rust caused by Puccinia striiformis Westend. f.sp. tritici Eriks. are destructive pathogens of wheat. From 2014 to 2015 phenotypic data was collected at …
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Characterizing soybean rust resistance within populations of Glycine tomentella and the inheritance and characterization of soybean aphid resistance in PI 587663, PI 587677, PI 587685, and PI 594592
Soybean rust, caused by Phakopsora pachyrhizi Syd., is known to cause significant damage to soybean yields in many production areas worldwide. Most soybean cultivars are susceptible to the fungus and even though sources of resistance have been discovered within the USDA soybean germplasm bank, …
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Identificazione di un QTL principale per resistenza a ruggine bruna sul cromosoma 7B di frumento duro
Leaf rust caused by Puccinia triticina is a serious disease of durum wheat (Triticum durum) worldwide. However, genetic and molecular mapping studies aimed at characterizing leaf rust resistance genes in durum wheat have been only recently undertaken. The Italian durum wheat cv. Creso shows a high …
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Selection for partial resistance to crown rust in oat
<p>Crown rust, caused by the fungal pathogen, Puccinia coronata, severely reduces kernel quality and grain yield in oat. Partial resistance is considered to be a durable form of rust resistance. The objectives of this study were to evaluate the effectiveness of index selection as a method for …
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Location of genes conditioning resistance of barley to leaf rust (Puccinia hordei Otth)
… were undertaken to locate genes conditioning resistance of barley (Hordeum vulgare L.) to Puccinia hordei Otth. The linkage relationships of resistance genes Pa in Speciale (C.I. 7536) and Pa₇ in Cebada Capa (C.I. 6193) with genes known to reside on chromosomes 2 and 3 were studied in crosses …
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Effects of temperature on wheat-pathogen interactions
… environment on host defence is not. Many wheat resistance genes are temperature sensitive and these were used as a starting point to investigate defence temperature sensitivity in wheat starting with yellow rust resistance gene Yr36, previously shown to be temperature-sensitive. The effect of …
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The oat-crown rust pathosystem: an interaction of a plant, a pathogen, and time
… time, by a process of selection, to defeat the resistances deployed in crop cultivars. The genetic architecture of disease resistance changes as a plant grows from a seedling to an adult plant, matures, and dies. The visual and spectral signature of plant stress and disease also changes as the …
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Feeding Value of High Protein Oat Silage Versus Corn Silage for Dairy Cows
… Spear oat has a stiff straw and moderate rust resistance which makes it favorable to farmers who grow it for livestock feeding. Regular oatlage has been compared to corn silage by various workers at various times, but no comparison has been made between com silage and oat silage ·from high …
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Ecological Process and the Blister Rust Epidemic: Cone Production, Cone Predation, and Seed Dispersal in Whitebark Pine (Pinus albicaulis)
… Cronartium ribicola (white pine blister rust), infects whitebark pine and kills cone-bearing branches and trees. Blister rust has spread nearly rangewide and damage and mortality are highest in the northwest US and southwest Canada. Mortality caused by mountain pine beetle (Dendroctonus …
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