Browsing by Subject "Department of Agronomy and Plant Genetics"
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Item Agronomy Gleanings, 1978 - 1981(University of Minnesota, 1978) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1982 - 1985(University of Minnesota, 1982) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1985 - 1987(University of Minnesota, 1985) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1988 - 1990(University of Minnesota, 1988) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1991 - 1993(University of Minnesota, 1991) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1994 - 1995(University of Minnesota, 1994) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1996 - 1998(University of Minnesota, 1996) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 1999 - 2000(University of Minnesota, 1999) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2002(University of Minnesota, 2002) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2003(University of Minnesota, 2003) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2004(University of Minnesota, 2004) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2005(University of Minnesota, 2005) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2006(University of Minnesota, 2006) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2007(University of Minnesota, 2007) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2008(University of Minnesota, 2008) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2009(University of Minnesota, 2009) University of Minnesota: Department of Agronomy and Plant GeneticsItem Agronomy Gleanings, 2011(University of Minnesota, 2011) University of Minnesota: Department of Agronomy and Plant GeneticsItem Creation of Near-Isogenic Wheat Lines for Use in Validating the Effect of a Novel Source of Fusarium Head Blight Resistance(2010-04-21) Nelson, MattFusarium Head Blight, also known as scab, is the most serious disease affecting wheat production in the upper Midwest. Scab is caused by the fungus Fusarium graminearum. Scab is the major reason for the dramatic loss of wheat production in the 1990’s and is still a major problem today. Therefore, identifying a novel source of genetic resistance in wheat is very important. Dr. James Anderson’s lab identified a quantitative trait locus (QTL) region on the long arm of chromosome 3B that appears to be conferring resistance to scab. The purpose of this research is to create near-isogenic wheat lines (NILs) to validate and quantify the effect of the QTL on Fusarium Head Blight infection.Item Designing a Screening Method for Organic Seed Treatments(2009-04-08) Lis, DmitriyCertified organic crop producers have limited options available for controlling seed related diseases. I have developed a screen that could be utilized to test various plant extracts as a possible seed treatment. In the initial screen, I tested paper birch (Betula papyrifer) and staghorn sumac (Rhus typhina) extracts against 4 plant pathogens: Fusarium solani, Phytophthora sojae, Rhizoctonia solani, and Pythium spp. The highest concentration of the sumac extract (25.0 micrograms/ml) reduced the growth of R. solani by 67%, F. solani and Pythium spp. by 100%, and P. sojae by 80%. The highest concentration of the sumac extract (25.0 micrograms/ml) reduced the growth of F. solani and Pythium spp. equal to or greater than the commercial seed treatment fungicides. The highest concentration of the paper birch extract (25.0 micrograms/ml) reduced the growth of R. solani by 47%, Pythium spp. by 40%, and P. sojae by 40%. Neither the sumac or the paper birch extract reduced the germination of soybean seeds.Item The Effect of Root Architecture on Phosphorus Uptake in Alfalfa (Medicago sativa)(2012-04-18) Slotke, AndreaNutrient uptake is a multifaceted system which is not fully understood. Many components, such as plant species, root structure, cultivar, nutrient application, nutrient movement within the soil, and mycorrhizal activity all play a part. While it is generally accepted that these mechanisms each play a part, the actual affect of each is not fully known. This study compared phosphorus uptake and plant yield in alfalfa Medicago sativa under varying conditions, including: high or low root system branches; alfalfa or alfalfa/grass mixtures; and with and without added phosphorus (P) on low P-testing soil. This experiment indicates a positive correlation between P uptake and yield with added P, as well as an interaction of root structure with P supply. This interaction indicates that under low P conditions P uptake did not differ significantly in the pure alfalfa stand, while in the alfalfa/grass mixture the high branching root systems show greater P uptake. Further research is examining the mycorrhizal component of uptake and yield through an analysis of nucleotide differentiation of fungi present on the roots. These results will be compared with plant P concentration, P uptake, and yield to evaluate the correlation between P acquisition and mycorrhizal abundance and diversity.