Agricultural Science Commons^™

Array-Based Genotyping And Expression Analysis Of Barley Cv. Maythorpe And Golden Promise, Harkamal Walia, Clyde Wilson, Pascal Condamine, Abdelbagi M. Ismail, Jin Xu, Xinping Cui, Timothy J. Close

Department of Agronomy and Horticulture: Faculty Publications

Background: Golden Promise is a salt-tolerant spring barley closely related to Maythorpe. Salt tolerance in Golden Promise has been attributed to a single mutation at the Ari-e locus (on 5H) resulting from irradiation of Maythorpe. Golden Promise accumulates lower shoot Na⁺ compared to Maythorpe when growing under saline conditions. This study focused on elucidating the genetic basis and mechanisms involved in this difference. Results: The level of polymorphism between the two genotypes was explored using the Barley1 GeneChip for single feature polymorphisms (SFPs) and an oligonucleotide pool assay for single nucleotide polymorphisms (SNPs). Polymorphism analyses revealed three haplotype blocks …

Nutrient Use Efficiency: Measurement And Management, Achim Dobermann

Department of Agronomy and Horticulture: Faculty Publications

Mineral fertilizers have sustained world agriculture and thus global population and wealth growth for more than 100 years (Smil, 2001; Stewart et al., 2005). Their contribution to increasing crop yields has spared millions of hectares of natural ecosystems that otherwise would have been converted to agriculture (Balmford et al., 2005). However, lacking, imbalanced, inappropriate or excessive use of nutrients in agricultural systems remains a concern. Nutrient mining is a major cause for low crop yields in parts of the developing world, particularly Africa. In other situations, nutrients such as nitrogen (N) and phosphorus (P) often move beyond the bounds of …

Intsormil Crsp: Sorghum, Millet And Other Grains Collaborative Research Support Program: Leader With Associates Cooperative Agreement No. Eep-A-00-06-0016-00; Award From The U.S. Agency For International Development To The University Of Nebraska-Lincoln, Joseph Schmidt

INTSORMIL Scientific Publications

Pursuant to the authority contained in the Foreign Assistance Act of 1961, as amended, the U.S. Agency for International Development (USAID) hereby awards to University of Nebraska - Lincoln (hereinafter referred to as the "Recipient"), the sum of $9,000,000.00 to provide support for a program in Sorghum, Millet, and Other Grains Collaborative Research Support Program as described in the Schedule of this award and in Attachment B, entitled "Program Description."

This Leader with Associates Cooperative Agreement is effective and obligation is made as of 09-30-2006 and shall apply to expenditures made by the Recipient in furtherance of program objectives during …

Industrial Production Of Activated Carbon From Cotton Stalks, Mamdouh Magued Louis

Archived Theses and Dissertations

Utilization of agricultural waste in the production of valuable products can promote the national efforts in minimizing serious public health risks from exposure to dangerous fumes that result from burning in open fields at the end of every harvest season. An agricultural waste, namely cotton stalks, was chosen for developing a cost effective process for the production of activated carbon using bench equipment at laboratory scale, and typical industrial equipment at pilot scale. Findings show that the pilot scale production trial was successful in terms of equipments chosen and quality of activated carbon produced. Physical and pore analysis showed that …

Proceedings Of The 33rd Annual Meeting, Southern Soybean Disease Workers (March 8-9, 2006, Jackson, Tennessee), Michael E. Schmidt, Ray Schneider, Daniel H. Poston, Jason Bond, Steve R. Koenning

Southern Soybean Disease Workers: Conference Proceedings

Contents

Southern Soybean Disease Workers 2005 treasury report

Southern United States Soybean Disease Loss Estimates for 2005. Compiled by SR Koenning

Virulence in Phytopbthora sojae Isolates to Soybeans with Rps8 Resistance. DA Smith, TS Abney, and JG Shannon

New Sources of Resistance to SCN in Soybean. PR Arelli

Soybean Disease Management in Louisiana. B Padgett, MA Purvis, and BW Garber

Efficacy and Profitability of Foliar Fungicide in the Absence of Soybean Rust. M Newman and W Percell

Fungicide and Insecticide Combinations for Enhancing Soybean Health and Yield. RP Mulrooney and RW Taylor

Overview of Soybean Rust Monitoring in the US. …

Transport Of E. Coli In Egyptian Agricultural Soils As A Result Of Reclaimed Wastewater Use For Irrigation, Aimen Badawy

Archived Theses and Dissertations

Limited water resources are one of the main constraints to socio-economic development and even a source of insecurity at national and regional levels. The increasing demand for water in the agricultural sector stimulated the use of reclaimed wastewater for irrigation. Comprehending health and environment risks resulting from contaminants that may often be associated with reclaimed wastewater will lead to the sustainable use of this resource, as well as the conservation of other water resources.

In the present study the fate and transport of one important wastewater constituent, namely E. Coli bacteria, in three Egyptian soils of typical agricultural use was …

Evaluation Of Cauliflower And Broccoli Varieties: Summer Planting (November 2005 - February 2006), Department Of Food And Agriculture, Western Australia

Horticulture research reports

This document has been prepared from a cauliflower and broccoli variety evaluation trial conducted at the Manjimup Horticultural Research Institute, South Western Highway, Manjimup WA 6258. The results reflect the growth characteristics, yield, quality and density of the cauliflower and broccoli varieties as recorded at this site during the conditions of the growing period (November 2005 to February 2006).

This report is the first in a series of four produced from the evaluation of cauliflower and broccoli varieties conducted at the Manjimup Horticultural Research Institute.

The results are provided to allow seed suppliers, seedling nurseries, producers, packers and marketers to …

Evaluation Of Cauliflower And Broccoli Varieties: Winter Planting (April - August 2006), Kristen Stirling

Horticulture research reports

This document has been prepared from a cauliflower and broccoli variety evaluation trial! conducted at the Manjimup Horticultural Research Institute, South Western Highway, Manjimup WA 6258. The results reflect the growth characteristics, yield, quality and density of the cauliflower and broccoli varieties as recorded at this site during the conditions of the growing period (April - August 2006).

This report is the third in a series of four produced from the evaluation of cauliflower and broccoli varieties conducted at the Manjimup Horticultural Research Institute. The results are provided to allow seed suppliers, seedling nurseries, producers, packers and marketers to identify …

Snp-Phage – High Throughput Snp Discovery Pipeline, Lakshmi K. Matukumalli, John J. Grefenstette, David L. Hyten, Ik-Young Choi, Perry B. Cregan, Curt P. Van Tassell

Department of Agronomy and Horticulture: Faculty Publications

Background: Single nucleotide polymorphisms (SNPs) as defined here are single base sequence changes or short insertion/deletions between or within individuals of a given species. As a result of their abundance and the availability of high throughput analysis technologies SNP markers have begun to replace other traditional markers such as restriction fragment length polymorphisms (RFLPs), amplified fragment length polymorphisms (AFLPs) and simple sequence repeats (SSRs or microsatellite) markers for fine mapping and association studies in several species. For SNP discovery from chromatogram data, several bioinformatics programs have to be combined to generate an analysis pipeline. Results have to be stored in …

Evaluation Of The Single Kernel Characterization System (Skcs) For Measurement Of Sorghum Grain Attributes, S. R. Bean, O. K. Chung, M. R. Tuinstra, Jeffrey F. Pedersen, J. Erpelding

Department of Agronomy and Horticulture: Faculty Publications

The single kernel characterization system (SKCS) has been widely used in the wheat industry, and SKCS parameters have been linked to end-use quality in wheat. The SKCS has promise as a tool for evaluating sorghum grain quality. However, the SKCS was designed to analyze wheat, which has a different kernel structure from sorghum. To gain a better understanding of the meaning of SKCS predictions for grain sorghum, individual sorghum grains were measured for length, width, thickness (diameter), and weight by laboratory methods and by the SKCS. SKCS predictions for kernel weight and thickness were highly correlated to laboratory measurements. However, …

Application Of Machine Learning In Snp Discovery, Lakshmi K. Matukumalli, John J. Grefenstette, David L. Hyten, Ik-Young Choi, Perry B. Cregan, Curtis P. Van Tassell

Department of Agronomy and Horticulture: Faculty Publications

Background: Single nucleotide polymorphisms (SNP) constitute more than 90% of the genetic variation, and hence can account for most trait differences among individuals in a given species. Polymorphism detection software PolyBayes and PolyPhred give high false positive SNP predictions even with stringent parameter values. We developed a machine learning (ML) method to augment PolyBayes to improve its prediction accuracy. ML methods have also been successfully applied to other bioinformatics problems in predicting genes, promoters, transcription factor binding sites and protein structures. Results: The ML program C4.5 was applied to a set of features in order to build a SNP classifier …

Effects Of Substrate And Temperature On Growth Of Aspergillus Flavus In Peanuts From Georgia, Premila Achar, Andres Sachez

Faculty Articles

We investigated the effects of different substrates (potato dextrose agar [PDA], nutrient agar [NA], and corn meal agar [CMA]) and temperatures on growth and aflatoxin production in Aspergillus flavus. Contaminated peanuts from retailers at different locations in Georgia were used throughout the experiment and 200 seeds were selected from each sample. PDA, NA, and CMA served as the substrate to express the mold from the contaminated seeds. Seeds were plated equidistantly on each of the media and incubated at 10° C, 27° C, 30° C, and 37° C, respectively. Seeds incubated on moist filter paper served as control. Neither growth …

Chemical Composition And Response To Dilute-Acid Pretreatment And Enzymatic Saccharification Of Alfalfa, Reed Canarygrass, And Switchgrass, Bruce S. Dien, Hans-Joachim G. Jung, Kenneth P. Vogel, Michael D. Casler, Joann F. S. Lamb, Loren Iten, Robert C. Mitchell, Gautum Sarath

Department of Agronomy and Horticulture: Faculty Publications

Alfalfa stems, reed canarygrass, and switchgrass; perennial herbaceous species that have potential as biomass energy crops in temperate regions; were evaluated for their bioconversion potential as energy crops. Each forage species was harvested at two or three maturity stages and analyzed for carbohydrates, lignin, protein, lipid, organic acids, and mineral composition. The biomass samples were also evaluated for sugar yields following pretreatment with dilute sulfuric followed by enzymatic saccharification using a commercial cellulase preparation. Total carbohydrate content of the plants varied from 518 to 655 g kg^-1 dry matter (DM) and cellulose concentration from 209 to 322 g kg …

Mutations In Arabidopsis Yellow Stripe-Like1 And Yellow Stripe-Like3 Reveal Their Roles In Metal Ion Homeostasis And Loading Of Metal Ions In Seeds, Brian M. Waters, Heng-Hsuan Chu, Raymond J. Didonato, Louis A. Roberts, Robynn B. Eisley, Brett Lahner, David E. Salt, Elsbeth L. Walker

Department of Agronomy and Horticulture: Faculty Publications

Here, we describe two members of the Arabidopsis (Arabidopsis thaliana) Yellow Stripe-Like (YSL) family, AtYSL1 and AtYSL3. The YSL1 and YSL3 proteins are members of the oligopeptide transporter family and are predicted to be integral membrane proteins. YSL1 and YSL3 are similar to the maize (Zea mays) YS1 phytosiderophore transporter (ZmYS1) and the AtYSL2 iron (Fe)-nicotianamine transporter, and are predicted to transport metal-nicotianamine complexes into cells. YSL1 and YSL3 mRNAs are expressed in both root and shoot tissues, and both are regulated in response to the Fe status of the plant. β-Glucuronidase reporter expression, driven by …

Soybean Cultivars Resulted From More Recombination Events Than Unselected Lines In The Same Population, T. R. Stefaniak, D. L. Hyten Jr., V. R. Pantalone, A. Klarer, T. W. Pfeiffer

Department of Agronomy and Horticulture: Faculty Publications

The selection of superior adapted cultivars has contributed to the doubling of soybean [Glycine max (L.) Merr.] yields in the USA since 1930. Genetic variation was required for this selection to be effective. The objective of this study was to evaluate the importance of homologous chromosome meiotic recombination in the creation of soybean cultivars. A set of 10 adapted high-yielding cultivars selected from the cross ‘Williams’ × ‘Essex’ was com-pared with a set of 156 random recombinant inbred lines (RILs) from the same population. Crossover events were identified using 143 simple sequence repeat (SSR) markers span-ning all 20 soybean …

Impacts Of Genetic Bottlenecks On Soybean Genome Diversity, D. L. Hyten, Qijian Song, Youlin Zhu, Ik-Young Choi, Randall L. Nelson, Jose M. Costa, James E. Specht, Randy C. Shoemaker, Perry B. Cregan

Department of Agronomy and Horticulture: Faculty Publications

Soybean has undergone several genetic bottlenecks. These include domestication in Asia to produce numerous Asian landraces, introduction of relatively few landraces to North America, and then selective breeding over the past 75 years. It is presumed that these three human-mediated events have reduced genetic diversity. We sequenced 111 fragments from 102 genes in four soybean populations representing the populations before and after genetic bottlenecks. We show that soybean has lost many rare sequence variants and has undergone numerous allele frequency changes throughout its history. Although soybean genetic diversity has been eroded by human selection after domestication, it is notable that …

Ethylene Could Influence Ferric Reductase, Iron Transporter, And H+-Atpase Gene Expression By Affecting Fer (Or Fer-Like) Gene Activity, Carlos Lucera, Brian M. Waters, Francisco Javier Romera, María José García, María Morales, Esteban Alcántara, Rafael Pérez-Vicente

Department of Agronomy and Horticulture: Faculty Publications

In previous works, it has been shown, by using ethylene inhibitors and precursors, that ethylene could participate in the regulation of the enhanced ferric reductase activity of Fe-deficient Strategy I plants. However, it was not known whether ethylene regulates the ferric reductase gene expression or other aspects related to this activity. This paper is a study of the effects of ethylene inhibitors and precursors on the expression of the genes encoding the ferric reductases and iron transporters of Arabidopsis thaliana (FRO2 and IRT1) and Lycopersicon esculentum (= Solanum lycopersicum) (FRO1 and IRT1) plants. The effects …

Agricultural Systems For Saline Soil: The Potential Role Of Livestock, David G. Masters, H C. Norman, E G. Barrett-Lennard

Natural Resources Research Articles

Human-induced soil salinity is becoming a major threat to agriculture across the world. This salinisation occurs in both irrigated and rain-fed agricultural zones with the highest proportions in the arid and semi-arid environments. Livestock can play an important role in the management and rehabilitation of this land. There are a range of plants that grow in saline soils and these have been used as animal feed. In many situations, animal production has been poor as a result of low edible biomass production, low nutritive value, depressed appetite, or a reduction in efficiency of energy use. Feeding systems are proposed that …

Proceedings Of The 32nd Annual Meeting, Southern Soybean Disease Workers (March 2-3, 2005, Scottsdale, Arizona), Ray Schneider, Boyd Padgett, Michael Schmidt, Jason Bond, Stephen R. Koenning

Southern Soybean Disease Workers: Conference Proceedings

Contents

Southern Soybean Disease Workers 2004 treasury report

Southern United States Soybean Disease Loss Estimates for 2004. Compiled by SR Koenning

Initial Discovery of Asian Soybean Rust in Louisiana in 2004 and Lessons for 2005. RW Schneider, CA Hollier, and HK Wbitam

Efficacy of myclobutanil for control of Asian soybean rust in Brazil (2004). MT Iarnauti, NA Alvarenga, JA Rosseto, GR Tofoli, BD Olson, DG Ouimette, and DC Ruen.

Flutriafol - a triazole fungicide giving strong curative action and persistence of effect against Asian soybean rust. T Baker and R Noon Cherninova

Experience in Use of Syngenta Fungicides for Controlling …

Excavated Tanks And Hillside Dams, Martyn Keen

Natural resources published reports

An excavated tank is an earth structure on near level land used to impound water, in which a percentage of the storage capacity is below ground level. It includes similar structures constructed on sloping land, referred to as 'hillside dams'. These are specific types of the group of water-impounding structures known as 'farm dams'.

Site Assessments, Martyn Keen

Natural resources published reports

The processes of collecting and recording site data as part of the preliminary tasks leading to a landscape or project design.

This standard applies to landscape and project designs for catchments of any size. Designs include: the installation of conservation earthworks; revegetation; land use planning; or implementation of erosion and sediment control practices. The design may also include any combination of the above

An Inventory Of Rangelands In Part Of The Broome Shire, Western Australia, W E. Cotching

Technical Bulletins

The inventory of rangelands in part of the Broome Shire in Western Australia was undertaken by DAFWA between 1989 and 1990. It describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The survey of part of the Broome Shire …

Ec05-185 Grazing Winter Wheat In Nebraska, Tom Holman, Drew J. Lyon, David D. Baltensperger, Ivan G. Rush, Ray E. Weed

University of Nebraska-Lincoln Extension: Historical Materials

Grazing cattle on winter wheat, often prior to grain harvest, is common throughout the southern Great Plains. Grazing generates about $50 million in income for Texas wheat producers and reduces the risk of growing wheat by providing a substantial income source other than grain. Benefits can be realized by grazing prior to the primary environmental risk period for drought, heat stress, and hail, all of which frequently reduce grain yield while having limited impact on forage production. Cattle also are grazed on winter wheat fields in western Nebraska and the surrounding region. Typically in Nebraska, fall forage would be used …

Effect Of Control Plot Density, Control Plot Arrangement, And Assumption Of Random Or Fixed Effects On Nonreplicated Experiments For Germplasm Screening Using Spatial Models, Boi Sebolai, Jeffrey F. Pedersen, D. B. Marx, D. L. Boykin

Department of Agronomy and Horticulture: Faculty Publications

Early generation selection experiments typically involve several hundred to thousands of lines. Various systematic and statistical techniques have been developed to increase effectiveness and efficiencies in such experiments, including the development and application of spatial statistical models. In this study, mixed model equations were used to provide least squares means (LSMEANs) and best linear unbiased predictors (BLUPs) and compare selection effectiveness and efficiencies to observed (Y) and true values in simulated experiments varying in size (10 X 10, 20 X 20 and 30 X 30 grids), control plots densities (0, 5, 10, 20, and 50%), control plot arrangements (high, medium, …

Miscellaneous Publication 19/2004 - Ord River Irrigation Area 2003 - Gross Margin Budget Guide For Horticultural Crops, Department Of Agriculture, Western Australia

Farm Systems and Economics research reports

Replaces Bulletin 4414

In 2000, Joanna Embry and Peter Gartrell, put together a Budget Guide for the Ord River Irrigation Area (ORIA). This document is an update with the objectives of updating some of those budgets to reflect current prices and yields. The two types of crops analysed are annual crops (cucurbits, field crops) and perennial crops (mangoes, bananas, and red fleshed grapefruit).

The analyses are prepared as guides of likely cost types and may not relate to individual growers. There is a wide range of fruit production systems, management techniques, varieties and market options making for a wide variation …

Comparison Of 'Organic' And 'Conventional' Grains And Soybean Prices In The Northern Great Plains And Upper Midwest: 1995 Through 2003, Nicholas Streff, Thomas L. Dobbs

Economics Pamphlet Series (1985-2016)

Price premiums for organic crops drew the attention of an increasing number of farmers throughout the 1990s. Premiums contributed to the expansion of U.S. farmland managed under organic farming systems during that time period. Expansion of organic farming systems continued at least through 2001. According to the U.S. Department of Agriculture (USDA) Economic Research Service's most recent data on organic farming systems, U.S. farmers and ranchers added almost one million acres of certified organic farmland between 1997 and 2001, an increase of 74 percent. Over that same time frame, certified organic cropland increased by 53 percent). The USDA implemented national …

Moisture Potential Affects Rate Of Leaf Appearance In Cool Season Grasses, Nina Cherone Terrell

McCabe Thesis Collection

The rate of leaf appearance and onset of growth in cool season grasses may be influenced by soil moisture potential and exposure to below freezing temperatures. Levels of moisture potential and days exposed to freezing temperatures, which will restrict leaf appearance, are not well defined. The first part of this study was to determine the effects of different moisture potentials on the leaf appearance rates in two cool season grasses. Italian ryegrass (IRG) and tall wheat grass (TWG) were grown hydroponically at 4 moisture potentials in seed pouches in an incubator under a photoperiod of 13 hours light and 11 …

Miscellaneous Publication 8/2004 - Midas User Manual. Version 1, Ross Kingwell, Felicity Flugge, Emma Kopke, Michael O'Connell

Farm Systems and Economics published reports

What is MIDAS?

It's a computer model of dryland farming in Western Australia. MIDAS is an acronym (Model of an Integrated Dryland Agricultural System). Currently there are five versions of MIDAS, each describes a representative farm in a particular farming region of Western Australia. Versions exist for the following regions (see Figure 1):

• the Eastern Wheatbelt;
• the Central Wheatbelt;
• the West Midlands;
• the Great Southern; and,
• the South Coast.

Each of these versions is a mathematical programming model of a representative farm.

Proceedings Of The 31st Annual Meeting, Southern Soybean Disease Workers (February 15-16, 2004, St. Louis, Missouri), Boyd Padgett, Patrick Fenn, Ray Schneider, Jason Bond, Stephen R. Koenning

Southern Soybean Disease Workers: Conference Proceedings

Contents

Southern United States Soybean Disease Loss Estimate for 2003. Compiled by Stephen R. Koenning

Shifts in Soybean Disease Incidence and Severity Following Adaptation of the ESPS (Early Soybean Productions system) in Mississippi. GL Sciumbato and DH Poston

Impact of Foliar Fungicides on Soybean Yield and Net Returns. BL Spinks, DH Poston, GL Sciumbato, and MA Blaine

Inheritance of Resistance to Phompsis Seed Decay in Soybean PI 80837. EW Jackson, P Fenn, P Chen, and PK Miller

Inheritance of Resistance to Purple Seed Stain in Soybean PI 80837. EW Jackson, P Fenn, P Chen, PK Miller

Population Structure of Cercospora …

Establishing Effects Of Application Of Swine Manure On Crop Leaf Damage To Growing Crops, Charles Shapiro, University Of Nebraska-Lincoln

Department of Agronomy and Horticulture: Faculty Publications

Swine manure from a below barn storage facility was applied to growing corn and soybeans to determine phytotoxic effects. The manure had an electrical conductivity of around 20 mmhos/cm and was diluted for treatment at full, half, quarter and none. The manure mixtures were applied at a rate of 0.5 in/acre using a procedure that wet the foliage three times in a 15-minute time span. Manure mixtures were applied at V7 and V14 for corn and V3 and R1 for soybeans. Phytotoxic effects were shown at the high rate for both crops, but soybeans were killed at the early application …