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Iowa State University

Soybean

2018

Genetics

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Using Genomic And Gene Expression Methods To Understand The Phenotypic Response Of Soybean To Sudden Death Syndrome Caused By Fusarium Virguliforme, Alexander Stephen Luckew Jan 2018

Using Genomic And Gene Expression Methods To Understand The Phenotypic Response Of Soybean To Sudden Death Syndrome Caused By Fusarium Virguliforme, Alexander Stephen Luckew

Graduate Theses and Dissertations

Soybean sudden death syndrome (SDS) is one of the most important soybean diseases in the Midwestern United States, leading to average losses of $396 million per year from 1996 to 2015. The causal agent of SDS, soilborne fungus Fusarium virguliforme (Fv), causes root rot symptoms and releases phytotoxins taken up by the plant to produce chlorosis and necrosis in the leaves. The main management practice used to reduce the impact of SDS is planting resistant soybean cultivars. Resistance to SDS is known to be quantitative with 88 known quantitative trait loci (QTL) based on Soybase.org. Many of these QTL ...


Functional Characterization Of A Fungal Polyamine Oxidase Fvpo1, Jordan Lillian Baumbach Jan 2018

Functional Characterization Of A Fungal Polyamine Oxidase Fvpo1, Jordan Lillian Baumbach

Graduate Theses and Dissertations

Soybean is an important source of protein and oil for both human and animal nutrition. The United States is the world’s leading soybean producing nation. In 2016, the U.S. soybean production was valued over 40.9 billion dollars. Sudden death syndrome (SDS) of soybean is ranked as one of the top ten yield limiting disease of soybean and is caused by the pathogen Fusarium virguliforme. Fusarium virguliforme is a soil borne fungal pathogen, which infects soybean roots resulting in both root sot symptoms and foliar chlorosis and necrosis. To date there is no known single gene resistance to ...