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Color Space Standardization And Image Analysis For High-Throughput Phenotyping Of Sorghum Bicolor, Alexandria A. Pokorny 2018 Department of Mathematics, Illinois State University

Color Space Standardization And Image Analysis For High-Throughput Phenotyping Of Sorghum Bicolor, Alexandria A. Pokorny

Annual Symposium on Biomathematics and Ecology: Education and Research

No abstract provided.


Identification Of Quantitative Trait Loci (Qtl) For Tolerance To Metribuzin In Soft Red Winter Wheat (Triticum Aestivum L.), Hugo Alfonso Anzueto Ponciano 2018 Louisiana State University at Baton Rouge

Identification Of Quantitative Trait Loci (Qtl) For Tolerance To Metribuzin In Soft Red Winter Wheat (Triticum Aestivum L.), Hugo Alfonso Anzueto Ponciano

LSU Master's Theses

Wheat is one of the world’s most important food crops and provides nearly 20% of the calories consumed. Wheat is the third most important crop after corn and rice on a global production scale. In Louisiana wheat harvest was about 6000 hectares in 2017. Wheat production is negatively affected by several biotic and abiotic factors including weather, diseases, and weeds. Metribuzin is a broad-spectrum herbicide commonly used in wheat because it is inexpensive and controls most of the common weeds in wheat fields. Metribuzin has benefits for the grower controlling weeds that might cause yield loss in varieties or ...


Yardwork: A Biography Of An Urban Place By Daniel Coleman, Vivian M. Hansen 2018 University of Calgary

Yardwork: A Biography Of An Urban Place By Daniel Coleman, Vivian M. Hansen

The Goose

Review of Daniel Coleman's Yardwork: A Biography of an Urban Place.


Genetic Diversity In An Invasive Clonal Plant? A Historical And Contemporary Perspective, Elliot D. Weidow 2018 University of New Orleans

Genetic Diversity In An Invasive Clonal Plant? A Historical And Contemporary Perspective, Elliot D. Weidow

University of New Orleans Theses and Dissertations

Introduced populations of Eichhornia crassipes (Pontederiaceae) possess extremely low levels of genetic diversity due to severe bottleneck events and clonal reproduction. While populations elsewhere have been well studied, North American populations of E. crassipes remain understudied. We used Amplified Fragment Length Polymorphism markers to assess genetic diversity and population structure in North American E. crassipes populations. Patterns of diversity over the past fifty years were analyzed using herbarium specimens. Furthermore, we sampled populations across the Gulf Coast of the United States throughout a year to determine contemporary genetic diversity and assess potential seasonal effects. Genetic diversity was found to be ...


Expression Of Carbohydrates Biosynthetic Genes In Developing Soybean Seeds, Jayden Rosen, Karen A. Hudson 2018 Purdue

Expression Of Carbohydrates Biosynthetic Genes In Developing Soybean Seeds, Jayden Rosen, Karen A. Hudson

The Summer Undergraduate Research Fellowship (SURF) Symposium

An essential part of livestock diets is soybean meal, which is a major source of protein, but which also consists of antinutritional carbohydrates. Antinutritional carbohydrates such as raffinose and stachyose lead to irritation to the gut for monogastric livestock as well as unhealthy weight gain. A major objective of soybean genetics is to reduce these antinutritional carbohydrates within the seed and increase the levels of good carbohydrates. This will lead to healthier livestock and better meat quality. To select genes potentially responsible for variation in carbohydrate levels in seeds, the expression of genes encoding several biosynthetic enzymes was measured during ...


Identification And Characterization Of Salinity Tolerance Genes By Activation Tagging In Arabidopsis, Jawaher Alkahtani 2018 University of Arkansas, Fayetteville

Identification And Characterization Of Salinity Tolerance Genes By Activation Tagging In Arabidopsis, Jawaher Alkahtani

Theses and Dissertations

Salinity often affects irrigated areas in arid and semi-arid regions of the world. The existence and accumulation of soluble salts in the soil layers limit the growth of crops essential for our food. Salt stress dramatically affects plant growth, plant development, as well as crop yield. Arabidopsis thaliana is the plant model that provides a comprehensive knowledge of plant development, genetics and physiology, and response to abiotic stresses such as salinity. The redundancy of genes due to duplication, even in the simple model genome of Arabidopsis, limits the value of knockout (KO) mutagenesis to provide complete information on gene function ...


Association Mapping And Genomic Selection For Yield And Agronomic Traits In Soft Winter Wheat, Dennis Bulusan Lozada 2018 University of Arkansas, Fayetteville

Association Mapping And Genomic Selection For Yield And Agronomic Traits In Soft Winter Wheat, Dennis Bulusan Lozada

Theses and Dissertations

Tools such as genome-wide association study (GWAS) and genomic selection (GS) have expedited the development of crops with improved genetic potential. While GWAS aims to identify significant markers associated with a trait of interest, the goal of GS is to utilize all marker effects to predict the performance of new breeding lines prior to testing. A GWAS for grain yield (GY), yield components, and agronomic traits was conducted using a diverse panel of 239 soft winter wheat (SWW) lines evaluated in eight site-years in Arkansas and Oklahoma. Broad sense heritability of GY (H2=0.48) was moderate compared to other ...


Designations For Individual Genomes And Chromosomes In Gossypium, Kunbo Wang, Jonathan F. Wendel, Jinping Hua 2018 Chinese Academy of Agricultural Sciences

Designations For Individual Genomes And Chromosomes In Gossypium, Kunbo Wang, Jonathan F. Wendel, Jinping Hua

Ecology, Evolution and Organismal Biology Publications

Gossypium, as the one of the biggest genera, the most diversity, and the highest economic value in field crops, is assuming an increasingly important role in studies on plant taxonomy, polyploidization, phylogeny, cytogenetics, and genomics. Here we update and provide a brief summary of the emerging picture of species relationships and diversification, and a set of the designations for individual genomes and chromosomes in Gossypium. This cytogenetic and genomic nomenclature will facilitate comparative studies worldwide, which range from basic taxonomic exploration to breeding and germplasm introgression.


Editorial: Optimizing Miscanthus For The Sustainable Bioeconomy: From Genes To Products, Kerrie Farrar, Emily A. Heaton, Luisa M. Trindade 2018 Aberystwyth University

Editorial: Optimizing Miscanthus For The Sustainable Bioeconomy: From Genes To Products, Kerrie Farrar, Emily A. Heaton, Luisa M. Trindade

Agronomy Publications

In this Research Topic we report advances in fundamental and applied aspects of the perennial C4 bioenergy crop miscanthus (Miscanthus spp.) and its role in mitigating climate change as part of the bioeconomy. Miscanthus is a high yielding C4 perennial grass with great potential for sustainable biomass production in temperate climates, including Europe and North America as well as its native Asia. With high resource use efficiency and good biomass quality, miscanthus is a well-suited feedstock for a plethora of applications including bioenergy, biofuels and biomaterials (van der Weijde et al.).


Qqs Orphan Gene And Its Interactor Nf‐Yc4 Reduce Susceptibility To Pathogens And Pests, Mingsheng Qi, Wenguang Zheng, Xuefeng Zhao, Jessica D. Hohenstein, Yuba Kandel, Seth O’Conner, Yifan Wang, Chuanlong Du, Dan Nettleton, Gustavo C. Macintosh, Gregory L. Tylka, Eve Syrkin Wurtele, Steven A. Whitham, Ling Li 2018 Iowa State University

Qqs Orphan Gene And Its Interactor Nf‐Yc4 Reduce Susceptibility To Pathogens And Pests, Mingsheng Qi, Wenguang Zheng, Xuefeng Zhao, Jessica D. Hohenstein, Yuba Kandel, Seth O’Conner, Yifan Wang, Chuanlong Du, Dan Nettleton, Gustavo C. Macintosh, Gregory L. Tylka, Eve Syrkin Wurtele, Steven A. Whitham, Ling Li

Plant Pathology and Microbiology Publications

Enhancing the nutritional quality and disease resistance of crops without sacrificing productivity is a key issue for developing varieties that are valuable to farmers and for simultaneously improving food security and sustainability. Expression of the Arabidopsis thaliana species‐specific AtQQS (Qua‐Quine Starch) orphan gene or its interactor, NF‐YC4 (Nuclear Factor Y, subunit C4), has been shown to increase levels of leaf/seed protein without affecting the growth and yield of agronomic species. Here, we demonstrate that overexpression of AtQQS and NF‐YC4 in Arabidopsis and soybean enhances resistance/reduces susceptibility to viruses, bacteria, fungi, aphids, and soybean cyst ...


The Use Of Potato (Solanum Tuberosum) Suspension Cells For Rapid Screening Of Chloroplast Transformation Vectors, Lindsey Shover 2018 University of Tennessee, Knoxville

The Use Of Potato (Solanum Tuberosum) Suspension Cells For Rapid Screening Of Chloroplast Transformation Vectors, Lindsey Shover

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Chloroplast genetic engineering is unique in that it allows for high levels of gene expression while providing a means of natural bio-confinement. Although the chloroplast genome sequence of over 800 plant species is known, the elements that naturally regulate chloroplast gene expression are poorly understood. Recently, our lab has developed a 264 part modular cloning kit that contains known chloroplast regulatory elements. This kit can be used for the construction of novel chloroplast transformation cassettes; however, functional testing of these cassettes is currently hindered by standard chloroplast transformation technologies. Therefore, the aim of this experiment was to develop a rapid ...


Effects Of Oxalate Oxidase Transgene Expression On Mycorrhizal Colonization In American Chestnuts, Hannah Roden 2018 SUNY College of Environmental Science and Forestry

Effects Of Oxalate Oxidase Transgene Expression On Mycorrhizal Colonization In American Chestnuts, Hannah Roden

Honors Theses

American chestnuts have been genetically engineered to express an oxalate oxidase gene isolated from wheat, which allows the plants to degrade oxalic acid, the virulence factor produced by Cryphonectria parasitica, the pathogenic fungus that causes the chestnut blight. In this study, we investigated the effect of oxalate oxidase gene expression on rate of mycorrhizal colonization of American chestnut root tips. Six-month-old transgenic and wildtype plantlets were placed in a soil inoculant and cultured in a greenhouse for 7 months, then root tips were visually assessed to estimate how many were colonized (expressed as a percentage). Three genotypes were used: ELLIS ...


A Genome Wide Association Study For Fusarium Head Blight Resistance In Southern Soft Red Winter Wheat, Amanda Holder 2018 University of Arkansas, Fayetteville

A Genome Wide Association Study For Fusarium Head Blight Resistance In Southern Soft Red Winter Wheat, Amanda Holder

Theses and Dissertations

Fusarium head blight (FHB) is a disease of small grains caused by the fungal pathogen Fusarium graminearum. FHB poses potential economic losses and health risks due to the accumulation of the mycotoxin deoxynivalenol (DON) on infected seed heads. The objectives of this study are: 1) evaluate soft red winter wheat (SRWW) lines for resistance to FHB in terms of resistance to initial inoculum (incidence); resistance to spread within the head (severity); resistance to DON accumulation; and resistance to Fusarium damaged kernels (FDK), 2) determine the frequency and effect of known FHB resistance genes and quantitative trait loci (QTL), and 3 ...


Genetic And Phytopathological Studies On Charcoal Rot Resistance In Soybean [Glycine Max (L) Merr.], Marcos Paulo da Silva 2018 University of Arkansas, Fayetteville

Genetic And Phytopathological Studies On Charcoal Rot Resistance In Soybean [Glycine Max (L) Merr.], Marcos Paulo Da Silva

Theses and Dissertations

Charcoal rot of soybean (Glycine max (L.), caused by Macrophomina phaseolina is a disease of economic significance in the United States. The identification and quantification of the resistance is difficult, and very little is known about the genetics and markers linked to the charcoal rot (CR) resistance genes. Current assay methods can be time consuming, and data may vary between tests. The objectives of this study were to 1) create a robust seed plate assay (SPA) for CR resistance by comparing results with cut-stem and CFUI assays; 2) correlate and compare field data disease assessments with SPA; 3) identify QTLs ...


An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley 2018 University of Arkansas, Fayetteville

An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley

Theses and Dissertations

Edamame is a food-grade soybean (Glycine max (L.) Merrill) that is either harvested immature (R6 stage) or after plant maturity (R8 stage). At R6, the premium product will have crescent- shaped large green pods and gray pubescence. At R8, the seed will either have stayed green or will have turned yellow, black, or brown. Edamame is a healthy snack with a sweet flavor and firm texture. The edamame market is growing in the United States, creating a need for more adapted varieties. The genetic diversity is low among adapted large-seeded breeding lines. Finding diverse accessions will help develop larger and ...


Genetic Diversity Analysis Of 11 Black Walnut (Juglans Nigra L.) Cultivars And Development Of A Mapping Population, Steven Jacob Schneider Jr 2018 Missouri State University

Genetic Diversity Analysis Of 11 Black Walnut (Juglans Nigra L.) Cultivars And Development Of A Mapping Population, Steven Jacob Schneider Jr

MSU Graduate Theses

Eastern black walnut (Juglans nigra L.) production stands on the brink of potentially great market expansion that can only be realized if tree improvement increases such that commercial production becomes feasible. Breeding black walnut for thinner shell, disease resistance, and predictable nut yield are just three of the many agronomically important traits that could be improved using marker-assisted selection (MAS). The goal of this study was to incorporate microsatellite markers to characterize (genotype) 11 cultivars and establish a mapping population from a cross between ‘Football’ and ‘Sparrow’ (Ft x Sp). Phenology of these two cultivars coupled with marker characteristics and ...


A Solution For Sampling Position Errors In Maize And Soybean Root Mass And Length Estimates, Raziel A. Ordonez, Michael J. Castellano, Jerry L. Hatfield, Mark A. Licht, Emily E. Wright, Sotirios V. Archontoulis 2018 Iowa State University

A Solution For Sampling Position Errors In Maize And Soybean Root Mass And Length Estimates, Raziel A. Ordonez, Michael J. Castellano, Jerry L. Hatfield, Mark A. Licht, Emily E. Wright, Sotirios V. Archontoulis

Agronomy Publications

Root mass and length attributes are difficult to obtain in the field and currently there is uniformity among literature studies in estimating the effect of sampling position error. With the objectives of 1) quantifying the sampling position error in calculating weighted average root values per unit area and 2) developing an algorithm to minimize root position sampling error so that existing data in the literature can be used in future studies, we collected and analyzed root mass and length data across four sampling positions (0, 12, 24 and 36 cm distance from the plant row; row-to-row spacing 76 cm) from ...


Response To Persistent Er Stress In Plants: A Multiphasic Process That Transitions Cells From Prosurvival Activities To Cell Death, Renu Srivastava, Zhaoxia Li, Giulia Russo, Jie Tang, Ran Bi, Usha Muppirala, Sivanandan Chudalayandi, Andrew J. Severin, Mingze He, Samuel I. Vaitkevicius, Carolyn J. Lawrence-Dill, Peng Liu, Ann E. Stapleton, Diane C. Bassham, Federica Brandizzi, Stephen H. Howell 2018 Iowa State University

Response To Persistent Er Stress In Plants: A Multiphasic Process That Transitions Cells From Prosurvival Activities To Cell Death, Renu Srivastava, Zhaoxia Li, Giulia Russo, Jie Tang, Ran Bi, Usha Muppirala, Sivanandan Chudalayandi, Andrew J. Severin, Mingze He, Samuel I. Vaitkevicius, Carolyn J. Lawrence-Dill, Peng Liu, Ann E. Stapleton, Diane C. Bassham, Federica Brandizzi, Stephen H. Howell

Office of Biotechnology Publications

The unfolded protein response (UPR) is a highly conserved response that protects plants from adverse environmental conditions. The UPR is elicited by endoplasmic reticulum (ER) stress, in which unfolded and misfolded proteins accumulate within the ER. Here, we induced the UPR in maize (Zea mays) seedlings to characterize the molecular events that occur over time during persistent ER stress. We found that a multiphasic program of gene expression was interwoven among other cellular events, including the induction of autophagy. One of the earliest phases involved the degradation by regulated IRE1-dependent RNA degradation (RIDD) of RNA transcripts derived from a family ...


Cover Crops Use In Midwestern U.S. Agriculture: Perceived Benefits And Net Returns, Alejandro Plastina, Fangge Liu, Fernando E. Miguez, Sarah Carlson 2018 Iowa State University

Cover Crops Use In Midwestern U.S. Agriculture: Perceived Benefits And Net Returns, Alejandro Plastina, Fangge Liu, Fernando E. Miguez, Sarah Carlson

Economics Publications

Despite being generally accepted as a promising conservation practice to reduce nitrate pollution and promote soil sustainability, cover crop adoption in Midwestern U.S. agriculture is low. Based on focus groups, surveys, and partial budgets, we calculated the annual net returns to cover crop use for farmers in Illinois, Iowa, and Minnesota; and elicited farmers’ perceptions about the pros and cons of incorporating cover crops to their row cropping systems. The novelty of our methodology resides in comparing each farmer’s practices in the portion of their cropping system with cover crops (typically small), against their practices in the other ...


Testing The Potential Of Novel Grain Crop Cultivation In Rural Malawi During The Dry Season Through Irrigation And Soil Modification, Jessica Truman 2018 Brigham Young University

Testing The Potential Of Novel Grain Crop Cultivation In Rural Malawi During The Dry Season Through Irrigation And Soil Modification, Jessica Truman

Undergraduate Honors Theses

This research project studied the germination and growth rates of oat and quinoa crops in Mtalimanja, Malawi. This project was part of a larger effort by General Mills and Brigham Young University researchers to increase the diversity and nutrient content of crops in impoverished countries worldwide. It was conducted from May to August 2017 during Malawi’s dry season. Tetraploid oats and quinoa, both modified to increase the protein content of harvested grains, were planted under three different soil conditions: unamended soil, soil mixed with composted chicken litter, and soil with surface-applied granular fertilizer. The research plots were watered daily ...


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