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Articles 1 - 30 of 48
Full-Text Articles in Life Sciences
Remote Estimation Of Nitrogen And Chlorophyll Contents In Maize At Leaf And Canopy Levels, Michael Schlemmer, Anatoly A. Gitelson, James S. Schepers, Richard B. Ferguson, Y. Peng, J. Shanahan, Donald Rundquist
Remote Estimation Of Nitrogen And Chlorophyll Contents In Maize At Leaf And Canopy Levels, Michael Schlemmer, Anatoly A. Gitelson, James S. Schepers, Richard B. Ferguson, Y. Peng, J. Shanahan, Donald Rundquist
Department of Agronomy and Horticulture: Faculty Publications
Leaf and canopy nitrogen (N) status relates strongly to leaf and canopy chlorophyll (Chl) content. Remote sensing is a tool that has the potential to assess N content at leaf, plant, field, regional and global scales. In this study, remote sensing techniques were applied to estimate N and Chl contents of irrigated maize (Zea mays L.) fertilized at five N rates. Leaf N and Chl contents were determined using the red-edge chlorophyll index with R2 of 0.74 and 0.94, respectively. Results showed that at the canopy level, Chl and N contents can be accurately retrieved using green and red-edge Chl …
Optimal Copper Supply Is Required For Normal Plant Iron Deficiency Responses, Brian M. Waters, Laura C. Armbrust
Optimal Copper Supply Is Required For Normal Plant Iron Deficiency Responses, Brian M. Waters, Laura C. Armbrust
Department of Agronomy and Horticulture: Faculty Publications
Iron (Fe) and copper (Cu) homeostasis are tightly linked across biology. Understanding crosstalk between Fe and Cu nutrition could lead to strategies for improved growth on soils with low or excess metals, with implications for agriculture and phytoremediation. Here, we show that Cu and Fe nutrition interact to increase or decrease Fe and/or Cu accumulation in leaves and Fe uptake processes. Leaf Cu concentration increased under low Fe supply, while high Cu lowered leaf Fe concentration. Ferric reductase activity, an indicator of Fe demand, was inhibited at insufficient or high Cu supply. Surprisingly, plants grown without Fe were more susceptible …
Nebline, Nov.-Dec. 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Family and Couple Strengths: Getting Connected, Staying Connected
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
Nebraska Variety And Hybrid Tests: Spring Seed Guide - 2014, Teshome Regassa, Dipak Santra, Charles A. Shapiro, Greg Kruger, Bruce Anderson
Nebraska Variety And Hybrid Tests: Spring Seed Guide - 2014, Teshome Regassa, Dipak Santra, Charles A. Shapiro, Greg Kruger, Bruce Anderson
Department of Agronomy and Horticulture: Faculty Publications
Corn Hybrid Tests Summary...........3–6
Growing Degree Days and Precipitation by County Charts...........7
Corn Tables 2013 A–F.............8–11
Test Location Map.......................... 11
Corn Hybrid Tests........................12–16
Soybean Variety Tests Summary.....................17–18
Soybean Tables 2013 A–F......19–21
Soybean Variety Tests............22–23
Sunflower Variety Tests......24–28
Pea Variety Test......29
Proso Millet Variety Test .... 30
Nebline, October 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Volunteering for 4-H is Rewarding and Fun, While Benefiting Youth
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
Nebline, September 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Community Gardens are Growing: UNL Extension in Involved With Several in Lincoln
Farm Views
Urban Agriculture
Food & Fitness
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Environmental Focus
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Nutrition Education Program
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High Yield Soybean Management: Planting Practices, Nutrient Supply, And Growth Modification, Evan Sonderegger
High Yield Soybean Management: Planting Practices, Nutrient Supply, And Growth Modification, Evan Sonderegger
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Growers are constantly seeking ways to improve yield in soybean [Glycine max (L.) Merr.]. There has been much interest in the use of selected alternative practices to maximize soybean yield. These practices include planting soybean at higher than recommended seeding rates, planting soybean in narrow rows, breaking apical dominance to induce branching, application of strobilurin fungicides prophylactically to minimize disease and extend the seed filling period, the use of N fertilizer both in furrow and foliar applied, and the use of seed treatments to promote early stand establishment and health. Field studies were conducted at the University of Nebraska …
Nebline, August 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: 8 Tips for Better-Tasting Fruits & Vegetables
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
2013 Lancaster County Super Fair Schedule & Map Special Pullout Section
Automated Conserved Non-Coding Sequence (Cns) Discovery Reveals Differences In Gene Content And Promoter Evolution Among Grasses, Gina Marie Turco, James C. Schnable, Brent S. Pedersen, Michael Freeling
Automated Conserved Non-Coding Sequence (Cns) Discovery Reveals Differences In Gene Content And Promoter Evolution Among Grasses, Gina Marie Turco, James C. Schnable, Brent S. Pedersen, Michael Freeling
Department of Agronomy and Horticulture: Faculty Publications
Conserved non-coding sequences (CNS) are islands of non-coding sequence that, like protein coding exons, show less divergence in sequence between related species than functionless DNA. Several CNSs have been demonstrated experimentally to function as cis-regulatory regions. However, the specific functions of most CNSs remain unknown. Previous searches for CNS in plants have either anchored on exons and only identified nearby sequences or required years of painstaking manual annotation. Here we present an open source tool that can accurately identify CNSs between any two related species with sequenced genomes, including both those immediately adjacent to exons and distal sequences separated by …
Nebline, July 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Integrated Pest Management in Nebraska Schools: Solving Pest Problems Effectively with Fewer Pesticides
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
2013 Fall Seed Guide, Teshome Regassa, P. Stephen Baenziger, Greg Kruger, Dipak Santra
2013 Fall Seed Guide, Teshome Regassa, P. Stephen Baenziger, Greg Kruger, Dipak Santra
Department of Agronomy and Horticulture: Faculty Publications
Nebraska Winter Wheat Variety Tests
Locations for Winter Wheat
Winter Wheat Characteristics
Alfalfa Variety Tests
Cool Season Grasses
Winter Barley Variety Tests
Triticale
NCIA Seed Book
Rate Of Shattercane × Sorghum Hybridization In Situ, Jared J. Schmidt, Jeffrey F. Pedersen, Mark L. Bernards, John L. Lindquist
Rate Of Shattercane × Sorghum Hybridization In Situ, Jared J. Schmidt, Jeffrey F. Pedersen, Mark L. Bernards, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Cultivated sorghum [Sorghum bicolor (L.) Moench subsp. bicolor] can interbreed with a feral weedy relative shattercane [S. bicolor nothosubsp. drummondii (Steud.) de Wet ex Davidse]. Traits introduced from cultivated sorghum could contribute to the invasiveness of a shattercane population. An experiment was conducted to determine the potential for pollenmediated gene flow from grain sorghum to shattercane. Shattercane with juicy midrib (dd) was planted in soybean [Glycine max (L.) Merr.] fields during 2 yr in concentric arcs at varying distances from a 0.39 ha sorghum pollen source with dry midrib (DD). The arcs …
Nebline, June 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Smart Family Finances
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
Nebline, May 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Moving Toward a Healthier You
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
Response Of Nebraska Horseweed (Conyza Canadensis) Populations To Dicamba, Roberto Crespo, Mark L. Bernards, Greg Kruger, Donald Lee, Robert Wilson Jr.
Response Of Nebraska Horseweed (Conyza Canadensis) Populations To Dicamba, Roberto Crespo, Mark L. Bernards, Greg Kruger, Donald Lee, Robert Wilson Jr.
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Dicamba-resistant soybeans are being developed to provide an additional herbicide mechanism-of-action for postemergence weed control in soybean. Numerous broadleaf species, including horseweed, have evolved resistance to glyphosate. It is anticipated that dicamba will be used by farmers as a primary tool to manage these weeds. Studying and understanding variability in horseweed response to dicamba will aid in developing appropriate risk management strategies to extend the utility of the dicamba-resistance technology. Horseweed plants from ten Nebraska populations were treated with one of nine doses of dicamba in greenhouse experiments. At 28 days after treatment (DAT) visual injury estimations were made and …
Nebline, April 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Landscapes in Drought
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
Weed Awareness Special Pullout Section
Nebline, March 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Dryland Farming in a Drought
Farm Views
Urban Agriculture
Food & Fitness
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Environmental Focus
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Nebline, February 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: Attracting Pollinators to Your Landscape
Farm Views
Urban Agriculture
Food & Fitness
Home & Family Living
Horticulture
Environmental Focus
4-H & Youth
Community Focus
Extension Calendar
Nutrition Education Program
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and other extension news and events
Sub1a-Mediated Submergence Tolerance Response In Rice Involves Differential Regulation Of The Brassinosteroid Pathway, Aaron J. Schmitz, Jing J. Folsom, Yusuke Jikamaru, Pamela C. Ronald, Harkamal Walia
Sub1a-Mediated Submergence Tolerance Response In Rice Involves Differential Regulation Of The Brassinosteroid Pathway, Aaron J. Schmitz, Jing J. Folsom, Yusuke Jikamaru, Pamela C. Ronald, Harkamal Walia
Department of Agronomy and Horticulture: Faculty Publications
Submergence 1A (SUB1A), is an ethylene response factor (ERF) that confers submergence tolerance in rice (Oryza sativa) via limiting shoot elongation during the inundation period. SUB1A has been proposed to restrict shoot growth by modulating gibberellic acid (GA) signaling.
Our transcriptome analysis indicated that SUB1A differentially regulates genes associated with brassinosteroid (BR) synthesis during submergence. Consistent with the gene expression data, the SUB1A genotype had higher brassinosteroid levels after submergence compared to the intolerant genotype. Tolerance to submergence can be activated in the intolerant genotype by pretreatment with exogenous brassinolide, which results in restricted shoot elongation …
Complete Plastid Genomes From Ophioglossum Californicum, Psilotum Nudum, And Equisetum Hyemale Reveal An Ancestral Land Plant Genome Structure And Resolve The Position Of Equisetales Among Monilophytes, Felix Grewe, Wenhu Guo, Emily A. Gubbels, A Katie Hansen, Jeffrey P. Mower
Complete Plastid Genomes From Ophioglossum Californicum, Psilotum Nudum, And Equisetum Hyemale Reveal An Ancestral Land Plant Genome Structure And Resolve The Position Of Equisetales Among Monilophytes, Felix Grewe, Wenhu Guo, Emily A. Gubbels, A Katie Hansen, Jeffrey P. Mower
Department of Agronomy and Horticulture: Faculty Publications
Background: Plastid genome structure and content is remarkably conserved in land plants. This widespread conservation has facilitated taxon-rich phylogenetic analyses that have resolved organismal relationships among many land plant groups. However, the relationships among major fern lineages, especially the placement of Equisetales, remain enigmatic.
Results: In order to understand the evolution of plastid genomes and to establish phylogenetic relationships among ferns, we sequenced the plastid genomes from three early diverging species: Equisetum hyemale (Equisetales), Ophioglossum californicum (Ophioglossales), and Psilotum nudum (Psilotales). A comparison of fern plastid genomes showed that some lineages have retained inverted repeat (IR) boundaries originating …
Indoor Application Of Attractive Toxic Sugar Bait (Atsb) In Combination With Mosquito Nets For Control Of Pyrethroid-Resistant Mosquitoes, Zachary P. Stewart, Richard M. Oxborough, Patrick K. Tungu, Matthew J. Kirby, Mark W. Rowland, Seth R. Irish
Indoor Application Of Attractive Toxic Sugar Bait (Atsb) In Combination With Mosquito Nets For Control Of Pyrethroid-Resistant Mosquitoes, Zachary P. Stewart, Richard M. Oxborough, Patrick K. Tungu, Matthew J. Kirby, Mark W. Rowland, Seth R. Irish
Department of Agronomy and Horticulture: Faculty Publications
Background: Attractive toxic sugar bait (ATSB) sprayed onto vegetation has been successful in controlling Anopheles mosquitoes outdoors. Indoor application of ATSB has yet to be explored. The purpose of this study was to determine whether ATSB stations positioned indoors have the potential to kill host-seeking mosquitoes and constitute a new approach to control of mosquito-borne diseases.
Methods: Insecticides were mixed with dyed sugar solution and tested as toxic baits against Anopheles arabiensis, An. Gambiae s.s. and Culex quinquefasciatus in feeding bioassay tests to identify suitable attractant-insecticide combinations. The most promising ATSB candidates were then trialed in experimental …
Mapping Soybean Aphid Resistance Genes In Pi 567598b, Carmille Bales, Guorong Zhang, Menghan Liu, Clarice Mensah, Cuihua Gu, Qijian Song, D. L. Hyten, P. B. Cregan, Dechun Wang
Mapping Soybean Aphid Resistance Genes In Pi 567598b, Carmille Bales, Guorong Zhang, Menghan Liu, Clarice Mensah, Cuihua Gu, Qijian Song, D. L. Hyten, P. B. Cregan, Dechun Wang
Department of Agronomy and Horticulture: Faculty Publications
The soybean aphid (Aphis glycines Matsumura) has been a major pest of soybean [Glycine max (L.) Merr.] in North America since it was first reported in 2000. Our previous study revealed that the strong aphid resistance of plant introduction (PI) 567598B was controlled by two recessive genes. The objective of this study was to locate these two genes on the soybean genetic linkage map using molecular markers. A mapping population of 282 F4:5 lines derived from IA2070 X E06902 was evaluated for aphid resistance in a field trial in 2009 and a greenhouse trial in 2010. Two …
Dna Fingerprinting And Anastomosis Grouping Reveal Similar Genetic Diversity In Rhizoctonia Species Infecting Turfgrasses In The Transition Zone Of Usa, B. S. Amaradasa, B. J. Horvath, D. K. Lakshman, S. E. Warnke
Dna Fingerprinting And Anastomosis Grouping Reveal Similar Genetic Diversity In Rhizoctonia Species Infecting Turfgrasses In The Transition Zone Of Usa, B. S. Amaradasa, B. J. Horvath, D. K. Lakshman, S. E. Warnke
Department of Agronomy and Horticulture: Faculty Publications
Rhizoctonia blight is a common and serious disease of many turfgrass species. The most widespread causal agent, Thanatephorus cucumeris (anamorph: R. solani), consists of several genetically different subpopulations. In addition, Waitea circinata varieties zeae, oryzae and circinata (anamorph: Rhizoctonia spp.) also can cause the disease. Accurate identification of the causal pathogen is important for effective management of the disease. It is challenging to distinguish the specific causal pathogen based on disease symptoms or macroscopic and microscopic morphology. Traditional methods such as anastomosis reactions with tester isolates are time consuming and sometimes difficult to interpret. In the present study universally …
Agricultural Innovation To Protect The Environment, Jeffrey Sayer, Kenneth Cassman
Agricultural Innovation To Protect The Environment, Jeffrey Sayer, Kenneth Cassman
Department of Agronomy and Horticulture: Faculty Publications
In a world of 9.5 billion people, global demand for food, fiber, and biofuels has to be met with minimal possible increases in land, water, fossil fuels, and the minerals used to produce fertilizers (1–4). The problem is debated at three levels: first, that agriculture will not be able to produce enough because it will come up against both biophysical and environmental limits that restrict yields (3, 5, 6); second, that the need to expand and intensify agriculture will destroy the broader environmental values of forests, wetlands, marine systems, and their associated biodiversity (7–9); and third, that there are institutional …
Nebline, January 2013
NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County
Feature: 4-H School Enrichment Programs Bring Hands-On Learning to Local Classrooms
Farm Views
Urban Agriculture
Food & Fitness
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Environmental Focus
4-H & Youth
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Extension Calendar
Nutrition Education Program
Family and Community Education (FCE) Clubs
and other extension news and events
2012 Annual Report Special Pullout Section
Unleashing The Potential Of The Root Hair Cell As A Single Plant Cell Type Model In Root Systems Biology, Zhenzhen Qiao, Marc Libault
Unleashing The Potential Of The Root Hair Cell As A Single Plant Cell Type Model In Root Systems Biology, Zhenzhen Qiao, Marc Libault
Department of Agronomy and Horticulture: Faculty Publications
Plant root is an organ composed of multiple cell types with different functions.This multicellular complexity limits our understanding of root biology because -omics studies performed at the level of the entire root reflect the average responses of all cells composing the organ. To overcome this difficulty and allow a more comprehensive understanding of root cell biology, an approach is needed that would focus on one single cell type in the plant root. Because of its biological functions (i.e., uptake of water and various nutrients; primary site of infection by nitrogen-fixing bacteria in legumes), the root hair cell is an attractive …
Genetic Mapping And Confirmation Of Quantitative Trait Loci For Seed Protein And Oil Contents And Seed Weight In Soybean, Safiullah M. Pathan, Tri Vuong, Kerry Clark, Jeong-Dong Lee, J. Grover Shannon, Craig A. Roberts, Mark R. Ellersieck, Joseph W. Burton, P. B. Cregan, David L. Hyten, Henry T. Nguyen, David A. Sleper
Genetic Mapping And Confirmation Of Quantitative Trait Loci For Seed Protein And Oil Contents And Seed Weight In Soybean, Safiullah M. Pathan, Tri Vuong, Kerry Clark, Jeong-Dong Lee, J. Grover Shannon, Craig A. Roberts, Mark R. Ellersieck, Joseph W. Burton, P. B. Cregan, David L. Hyten, Henry T. Nguyen, David A. Sleper
Department of Agronomy and Horticulture: Faculty Publications
Demand for soybean [Glycine max (L.) Merr.] meal has increased worldwide and soybean importers often offer premiums for soybean containing higher contents of protein and oil. Objectives were to detect quantitative trait loci (QTL) associated with soybean seed protein, oil, and seed weight in a soybean mapping population and confirm detected QTL across genetic backgrounds and environments. Two populations of 216 and 156 recombinant inbred lines were developed from Magellan × PI 438489B and Magellan × PI 567516C crosses, respectively, and grown in two Missouri environments in 2008. More than 900 simple sequence repeat (SSR) and single nucleotide polymorphism …
Soybean Seed Amino Acid Content Qtl Detected Using The Universal Soy Linkage Panel 1.0 With 1,536 Snps, Benjamin D. Fallen, Catherine N. Hatcher, Fred L. Allen, Dean A. Kopsell, Arnold M. Saxton, Pengyin Chen, Stella K. Kantartzi, P. B. Cregan, D. L. Hyten, Vincent R. Pantalone
Soybean Seed Amino Acid Content Qtl Detected Using The Universal Soy Linkage Panel 1.0 With 1,536 Snps, Benjamin D. Fallen, Catherine N. Hatcher, Fred L. Allen, Dean A. Kopsell, Arnold M. Saxton, Pengyin Chen, Stella K. Kantartzi, P. B. Cregan, D. L. Hyten, Vincent R. Pantalone
Department of Agronomy and Horticulture: Faculty Publications
Soybean [Glycine max (L.) Merr.] is the primary source of meal used in animal feed in the U.S. However, few studies have been conducted to evaluate genomic regions controlling amino acid composition is soybean. Designing soybean seed compositions that will benefit animal production is essential. The objective of this study was to identify genomic regions controlling essential and non-essential amino acid composition in soybean seed proteins. To achieve this objective, 282 F5:9 recombinant inbred lines (RILs) developed from a cross of Essex × Williams 82 were used. Ground soybean seed samples were analyzed for amino acids and statistically …
Development And Evaluation Of Soysnp50k, A High-Density Genotyping Array For Soybean, Qijian Song, D. L. Hyten, Gaofeng Jia, Charles V. Quigley, Edward W. Fickus, Randall L. Nelson, P. B. Cregan
Development And Evaluation Of Soysnp50k, A High-Density Genotyping Array For Soybean, Qijian Song, D. L. Hyten, Gaofeng Jia, Charles V. Quigley, Edward W. Fickus, Randall L. Nelson, P. B. Cregan
Department of Agronomy and Horticulture: Faculty Publications
The objective of this research was to identify single nucleotide polymorphisms (SNPs) and to develop an Illumina Infinium BeadChip that contained over 50,000 SNPs from soybean (Glycine max L. Merr.). A total of 498,921,777 reads 35–45 bp in length were obtained from DNA sequence analysis of reduced representation libraries from several soybean accessions which included six cultivated and two wild soybean (G. soja Sieb. et Zucc.) genotypes. These reads were mapped to the soybean whole genome sequence and 209,903 SNPs were identified. After applying several filters, a total of 146,161 of the 209,903 SNPs were determined to be …
The Plant Science Decadal Vision: Response To The Martin Commentary, David Stern, Sally Ann Mackenzie
The Plant Science Decadal Vision: Response To The Martin Commentary, David Stern, Sally Ann Mackenzie
Department of Agronomy and Horticulture: Faculty Publications
The plant science community is being called upon as never before to carry out research that addresses challenges in food, climate, and health, to educate a populace inundated with science misinformation, and to excite and recruit a new generation of scientists from among that populace, all while investments in basic research are stagnant or even declining in many countries. The Decadal Vision (Plant Science Research Summit, 2013) represents a response from that community, one that launches a meaningful and ongoing dialogue about how best to accomplish these goals. In that spirit, we welcome this thoughtful commentary by Cathie Martin (Martin, …