Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"qualitative resistance"”.
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Qualitative Resistance to Exserohilum Turcicum Race 2 in Maize (Corn, Genetics)
… been controlled effectively for over 15 years by qualitative and quantitative resistance. In 1979 a new race of the fungus (race 2) was found in the U.S. Corn Belt. This study was designed to evaluate currently available sources of qualitative resistance for their effectiveness against race 2. The …
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Optimising fungicide application tactics: using mathematical modelling to understand qualitative and quantitative fungicide resistance management
… by pathogen evolution leading to fungicide resistance and loss of cultivar efficacy (‘cultivar breakdown’). Both fungicide resistance and cultivar breakdown can be characterised as qualitative or quantitative, depending on the genetic basis for resistance/breakdown. Mathematical models have …
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Identifying loci conferring quantitative disease resistance in sorghum and maize against fungal foliar pathogens
… themselves against pathogens. Broadly disease resistance can be split into qualitative and quantitative resistance. In qualitative resistance the presence of a single resistance gene (R gene) confers complete resistance against the pathogen. R proteins can interact directly as receptors or …
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Genetic characterization of a dominant susceptible Rpp1 allele and analysis of quantitative resistance to Asian soybean rust
… Miles, and Frederick 2007). Soybean natural resistance to P. pachyrhizi has been identified as single R gene-conferred, and seven Rpp (Rpp1-Rpp7; Resistance to Phakopsora pachyrhizi 1-7) gene loci have been identified and mapped (Hartman et al. 2012). Although multiple Rpp genes have been …
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Genetic characterization of Rpp1-mediated Asian soybean rust resistance using in-depth transcriptomic and genomic analyses
… of the six known resistant loci that can confer qualitative resistance in soybean resulting in either red-brown lesions with no or limited sporulation, or immune phenotype of the incompatible interaction that show miniscule or no lesions and no sporulation. Due to the rapid changing nature of …
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Evaluation of race population distribution, fungicide sensitivity, and fungicide control of Exserohilum turcicum, the causal agent of northern leaf blight of corn
… lines containing Ht1, Ht2, Ht3, Htm1, and Htn1 resistance genes. Isolates were collected from fields in Illinois, Indiana, Iowa, Minnesota, North Carolina, Ohio, and Wisconsin, including: 143 isolates collected between 2007 and 2014; and 13 isolates collected between 1979 and 1985. Twenty …