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A Place to Call Home
Meeting the Needs of Perennial Plants
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Advanced Backcross Breeding
This lesson is a detailed explanation of the backcross breeding process. Variations based on whether backcrossing is performed with dominant, recessive, or multiple traits are discussed. Calculations ...
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Aparición de resistencia a herbicidas, en una población de malezas
El uso repetido del mismo herbicida, puede provocar poblaciones de malezas que consisten de biotipos susceptibles (S) que son controlados y biotipos resistentes (R), que escapan al control para produc...
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Aplicaciones prácticas de la fisiología de los herbicidas en las plantas
Esta lección se focaliza en el impacto de las características de la planta y el herbicida, importantes para determinar el desempeo del herbicida. Se usarán imágenes visuales para ilustrar varios...
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Appearance of Herbicide Resistance in a Weed Population
Through the repeated use of the same herbicide, weed populations can
consist of susceptible (S)-biotypes that are controlled and herbicide
resistant (R)-biotypes that are left behind to produce and ...
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Asteraceae
This lesson contains information about the Asteraceae family.
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Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 1 - Introduction
The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides were the f...
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Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 2 - Advanced
The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides are thoug...
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Backcross Breeding 1 - Basic Gene Inheritance
This lesson reviews the basics of gene inheritance. It compares plants that are homozygous, heterozygous, and hemizgous
for an allele and how gene expression is affected by the dominance of an allel...
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Backcross Breeding 2 - The Backcrossing Process
This lesson discusses the final stage of developing genetically engineered crops. The need for backcrossing, and the steps
of this breeding method are described. Yield lag, yield drag, and gene stac...
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Basic Techniques of Plant Tissue Cultures
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Breeding for Grain Quality Traits: The challenges of measuring phenotypes and identifying genotypes.
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Case of the Drought Resistant Genetically Engineered Corn Plant
This scenario accompanies the
online lesson, "Transpiration - Water Movement Through Plants", and is
designed to allow you to apply the concepts learned in that lesson to a
real-life problem.
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Cellular Absorption of Herbicides
Before a herbicide can kill a plant, it must be absorbed by the plant’s leaves or roots and enter a cell which possesses the metabolic pathway the herbicide targets. This lesson follows the fat...
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Chi-Square Test for Goodness of Fit in a Plant Breeding Example
In plant breeding and genetics research, plant breeders establish a hypothesis to explain how they think a particular trait is inherited, such as if it is due to one gene with complete dominance, an i...
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Clasificación de los herbicidas
Esta lección se enfoca en entender el sistema de clasificación en el
cual están organizados los herbicidas. Terminología como clasificación,
jerarquía de clasificación, ejemplos de clasificac...
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Corn Breeding: Lessons From the Past
This is the first in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with forma...
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Corn Breeding: Introduction to Concepts in Quantitative Genetics
This is the second in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with form...
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Corn Breeding: Mass Selection
This is the fourth in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with forma...
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Corn Breeding: Types of Cultivars
This is the third in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with formal...
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Corn Flowers and Hybrid Seeds
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Corn Rootworm - Part 1: Description of Corn Rootworm and Other Early Season Corn Pests
This lesson will discuss the corn rootworm complex, which consists of
the northern, western, and southern corn rootworm, focusing on the
northern and western species. The information in this lesson ...
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Corn Rootworm - Part 2: Corn Rootworm Management
This lesson will discuss economic thresholds and management options
related to the corn rootworm complex consisting of the northern,
western, and southern corn rootworm, with emphasis on the norther...
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Defoliation - Grazing Response
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Deliberate Mechanical Defoliation of Perennials
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Descripción de la Ingeniería Genética
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DNA and DNA Extraction
This lesson discusses what DNA is and how it relates to genes and chromosomes. How and why DNA is extracted in
the genetic engineering process is also covered.
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DNA for Dinner 4-H Curriculum
Curriculum Authors: Peggy G. Lemaux and Barbara Alonso. University of California, Berkeley
It is “(DNA for) Dinner” Time! The five lessons in this curriculum, designed for fifth throu...
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Electrophoresis: How scientists observe fragments of DNA
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Embryogenesis
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Erosion
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Erosion Control Measures
This lesson will discuss erosion control practices in the agricultural and construction environments. The impact of erosion management practices will be demonstrated with exercises using a USLE calcul...
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European Corn Borer and Bacillus thuringiensis
This lesson contains information about the history, life cycle, and host plants of the European corn borer and information relating to the history and biology of Bacillus thuringiensis.
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Flowering Principles
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Foliar Absorption and Phloem Translocation
Herbicides must be absorbed into plants in order to be effective. Herbicide
absorption can occur through leaves, roots or both. The process by which herbicides
kill weeds, called mode of actio...
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Gene Cloning
This lesson covers the utilization of gene cloning to isolate and copy a specific gene of interest. The transformation of
bacteria with plasmids containing antibiotic resistance genes to make gene l...
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Gene Cloning Part 1: The Mechanics of Recombinant DNA
This lesson describes how DNA molecules can be recombined to make recombinant DNA and how special DNA molecules called plasmids allow scientists to clone genes.
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Gene Cloning Part 2: Making and Screening Gene Libraries
This lesson teaches how a specific gene can be identified from among the thousands of genes that can be cloned from an organism.
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Gene Design 1 - Gene Regions
This lesson describes the three gene regions and their roles in gene expression. It also discusses how the regions of a gene
can be altered to obtain desired trait expression.
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Gene Design 2 - Gene Constructs
This lesson builds upon the gene region lesson discussing the gene construct of currently used hybrids and explaining how
these combinations result in a particular gene expression.
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Gene Expression Part 1: Reading Genes to Make Proteins
This lesson describes the steps involved in a cell as DNA sequence information is read to make RNA and RNA is read to make proteins.
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Gene Expression Part 2: Expression of Herbicide Resistant ALS Genes in Plants
This lesson describes how changes in the DNA sequence of a gene can alter the synthesis of a protein and thus influence traits such as herbicide resistance.
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Greening Up the Greens - Transpiration Application Scenario
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Herbicidas que Actúan A través de la Fotosíntesis
En esta lección se examinarán los herbicidas que afectan los procesos celulares relacionados con la utilización de la luz, causando así daos a las plantas. Existen cuatro mecanismos básicos que ...
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Herbicide Classification
This lesson focuses on understanding the classification system into
which herbicides are organized. Terms of classification, classification
hierachy, examples of classification and a brief overview ...
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Herbicide Discovery and Screening
Historically, herbicides have been discovered by randomly screening collections of chemicals for activity on target weeds. While totally empirical, this approach has been surprisingly successful and ...
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Herbicide Resistance: Mechanisms, Inheritance, and Molecular Genetics
This lesson will detail the biochemical mechanisms and genetics of herbicide resistance in weeds. Herbicide resistance is one of the major issues in weed science today; therefore, it is important to h...
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Herbicides That Act Through Photosynthesis
This lesson will examine herbicides that adversely affect light-related processes, thereby causing damage to plants. There are four basic mechanisms that will be studied in this class of agents: her...
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High School Quiz, Agronomy
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High School Quiz, Horticulture
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High School Tree Identification Quiz
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Inhibidores de la Síntesis de Aminoácidos Aromáticos
En esta lección se detallarán los procesos bioquímicos que son afectados por los herbicidas que inhiben la síntesis de aminoácidos en las plantas. Se describirá también la importancia de los am...
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Inhibitors of Aromatic Amino Acid Biosynthesis
This lesson will detail the biochemical mechanisms that are affected by herbicides which inhibit a plant’s ability to synthesize amino acids. The significance of amino acids and proteins will also b...
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Inhibitors of Branched Chain Amino Acid Biosynthesis
Herbicides that inhibit the production of the branched chain amino acids valine, leucine and isoleucine are used for total vegetation management and selective weed control in a wide variety of crops....
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Inhibitors of Fatty Acid Synthesis and Elongation
Fatty acid synthesis and fatty acid elongation are two parts of a critically important pathway in plants. The endproducts are essential components of cell membranes, waxes, and suberin. Two chemical f...
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Irrigation Management
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Just the facts
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Kid Quiz, Agronomy
Questions for kids
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Kid Quiz, Horticulture
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Kids Tree Identification Quiz
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La Interacción de la Luz con las Biomoléculas
En esta lección se describe la naturaleza de la luz, la energía de los fotones y como dicha energía puede ser transferida a las biomoléculas. Se describen también tanto los procesos benéficos c...
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La Transpiración - Movimiento del Agua a Través de las Plantas
La transpiración es la pérdida de agua en forma de vapor por las plantas. El agua es absorbida del suelo por las raíces y transportada en forma líquida por el xilema hacia las hojas. En las hojas,...
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Linkage - Part 1
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Linkage - Part 2
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Los Pigmentos Vegetales y la Fotosíntesis
En esta lección se examinarán las dos principales clases de pigmentos fotosintéticos: las clorofilas y los carotenoides. Se analizarán sus estructuras bioquímicas y su biosíntesis, y se explica...
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Manure Phosphorus and Surface Water Protection I: Basic Concepts of Soil and Water P
This lessonfocuses on the process of eutrophication; the relationship betweenland application of manure andsoil phosphorus (P) dynamics on P delivery to surface waters; and on the P dynamics in wat...
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Manure Phosphorus and Surface Water Protection II: Field and Management Factors
This lesson describes how source factors, including soil characteristics and management practices, affect phosphorus (P) delivery to surface waters; and also discusses howcrop producers cancontrolt...
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Manure Phosphorus and Surface Water Protection III: Transport Factors
This lesson addresses transport factors that may contribute to phosphorus (P) delivery to surface waters. Erosion, runoff, subsurface flow,drainage, and distance to surface water are the main factor...
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Manure Phosphorus and Surface Water Protection IV: Assessment of the Risk of Agricultural P Delivery
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Marker-Assisted Selection
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Mecanismo(s) de Acción de las Auxinas y los Herbicidas Auxínicos - Parte 1- Introducción
Descripción:
El control selectivo de malezas de hoja ancha en cultivos de cereales utilizando herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso más amp...
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Mecanismo(s) de Acción de los Herbicidas Auxínicos - Parte 2 - Nivel Avanzado
Descripción:
El control selectivo de malezas de hoja ancha en cultivos de cereales por los herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso mas ampliam...
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Metabolism of Herbicides or Xenobiotics in Plants
This lesson will take an indepth view of how plants handle foreign chemicals (xenobiotics) such as herbicides. It will discuss the three main phases that plants use to handle toxic chemicals, which en...
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Mitosis and Meiosis and the Cell Cycle
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Module 1: Basic Biotechnology
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Module 2: Biotechnology and the Consumer
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Module 3: Biotechnology Practice Applications
Objectives Upon completion of this lesson, nutrition professionals should be able to: Define functional foods and give examples of them. Recognize the potential for allergen removal from food. L...
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Module 4: Nutrient Composition
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Module 5: Allergenicity
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Native Plant Breeding: Bringing the Beauty of Nature Home
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Overview of Plant Genetic Engineering
Lesson one is a general description of the overall process of genetic engineering. A basic explanation of the five steps for genetically engineering a crop is provided. Details for each step are given...
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Perennial Plant Response to Defoliation - An Overview
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Plant Pigments and Photosynthesis
This lesson will examine the two major classes of phototsynthetic pigments, chlorophylls and carotenoids, their biochemical structures and their biosynthesis. The organization of these pigments into ...
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Polymerase Chain Reaction (PCR)
The polymerase chain reaction laboratory technique is used in a variety of applications to make copies of a specific DNA sequence. This lesson describes how a PCR reaction works, what it accomplishes...
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Practical Applications of Herbicide Physiology
This lesson will focus on the impact of herbicide and plant characteristics important in determining herbicide performance. Visual images will be used to illustrate several principles including herbic...
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Producing Grain for Animal, Food, and Industrial Uses
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Propagation and Procreation - More of a Good Thing
-Creating unique individuals or perfect little clones
-Genetics of it all--Peas in Darwin's pods
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Protein Detection in Plants
This lesson will focus on molecular principles involved in the detection of biotechnology derived proteins in crops, using the lateral flow ELISA.
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Quantitative Trait Locus (QTL) Analysis 1
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Quantitative Trait Locus (QTL) Analysis 2
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Quantitative Traits
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Real Time PCR - Some Basic Principles
Real time PCR is a laboratory technique that can perform relatively accurate, reliable and reproducible measurements, to quantitatively determine the presence of specific gene sequences. Its value is...
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Root Absorption and Xylem Translocation
Overview: Herbicides must be absorbed into plants in
order to be effective. Plant roots and below ground shoots have few
barriers to herbicide absorption; however, interactions with soil
particles ...
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Seed Lab Testing
First attempt at loading the Seed Lab Lesson.
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Soil Genesis and Development, Lesson 1 - Rocks, Minerals, and Soils
This lesson identifies some common rocks and minerals and how they influence soil formation.
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Soil Genesis and Development, Lesson 2 - Processes of Weathering
This lesson identifies the factors of weathering processes and how they influence soil formation.
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Soil Genesis and Development, Lesson 3 - Soil Forming Factors
This lesson identifies the five major soil forming factors and discusses how they influence soil development.
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Soil Genesis and Development, Lesson 4 - Soil Profile Development
This lesson discusses the processes controlling soil formation and how these processes relate to the characteristics of a soil profile.
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Soil Genesis and Development, Lesson 5 - Soil Classification and Geography
This lesson discusses the characteristics of the 12 soil orders defined by the USDA soil classification system, the major factors involved with their formation, and their geographic distribution acros...
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Soil Genesis and Development, Lesson 6 - Global Soil Resources and Distribution
This lesson discusses soil resources and functions at the global scale.
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Soil Genesis and Development, Scenario 1 - Agroecosystem Soil, Food and Fiber
This case study addresses how soil formed in different geographical locations of the world influences food and fiber production.
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Soil Genesis and Development, Scenario 2 - Biosolid Addition and Soil Formation
This case study addresses where geographically soil addition of
municipal organic wastes occurs and how this addition affects soil
profile development and the use of soils as a sustainable resource.
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Soil Genesis and Development, Scenario 3 - Soils and Salts
This case study addresses how soil formed in different parts of the landscape influences productivy in the broad sense, of both economic and non-economic flora and fauna.
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Soils - Part 10: The Scientific Basis for Making Fertilizer Recommendations
Soils - Part 9 addressed how soil testing works and the
proper method of taking soil samples. The purpose of soil testing is to
provide a rational basis for making fertilizer recommendations. The
i...
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Soils - Part 1: The Origin and Development of Soil
(How Soil Gets a Life and a Name)
Soil means different things to different people. To some, soil is something that must be swept away; to others it is just a material that sticks to your shoes. In both instances, soil is associated wi...
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Soils - Part 2: Physical Properties of Soil and Soil Water
Soil may look simple; however, it is an extremely complex system. It
is most often described by its physical, chemical and biological
properties and processes. Soil is organic or inorganic; inert or...
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Soils - Part 3: Soil Organic Matter
To most gardeners, organic matter is like Husker football—everybody
is a fan, but not everybody understands the details of the game. Anyone
who uses a soil should have an interest in its organ...
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Soils - Part 4: Soil pH
Soil pH is one of the most important chemical characteristics of the
soil. For example, soil pH can affect availability of plant nutrients.
In addition, the soil pH can affect the performance of pre...
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Soils - Part 5: Nitrogen as a Nutrient
Nitrogen (N) is one of the most abundant elements on earth, and
after carbon (C), hydrogen (H), and oxygen (O), it’s the element living
creatures need most. The atmosphere over each square foo...
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Soils - Part 6: Phosphorus and Potassium in the Soil
Phosphorus fertilizers are second only to nitrogen in importance for
growing crops in Nebraska; however, the principles affecting efficient
phosphorus use are totally different. Nitrogen is a mobile...
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Soils - Part 7: Soil and Plant Considerations for Calcium, Magnesium, Sulfur, Zinc, and other Micronutrients
Sixteen elements are known to be essential for plant growth. These are divided into two groups: macronutrients — those elements used in relatively large quantities and micronutrients — tho...
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Soils - Part 8: Characteristics of Fertilizer Materials
During the first seven lessons, we have discussed a variety of
topics related to soils, ranging from their formation to how nitrogen
reacts in the soil. In Soils - Part 8, we are going to shift
gea...
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Soils - Part 9: Fundamentals of Soil Testing
Soil tests are part of a four-step process of determining and providing nutrients to agronomic crops. The four steps are:1) soil sampling,2) soil analysis,3) result interpretation and decision making,...
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Start to Finish Case Study for Marker-Assisted Selection in Tomato Disease Resistance
Part 1: Looking for Genes
Quiz Questions for eXtension Lesson, Start to Finish Case Study for Marker-Assisted Selection in Tomato Disease Resistance
Part 1: Looking for Genes.
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The Dihybrid Cross and Independent Assortment
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The Inheritance of Variation
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The Interaction of Light with Biological Molecules
This lesson describes the nature of light, the energy within photons and how this energy may be transferred to biological molecules. In addition, the beneficial and harmful methods for de-exciting mo...
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The New Bts
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The role of JAR-1 in insect feeding response
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Theories Behind Plant Tissue Culture
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Transformation 1 - Plant Tissue Culture
This lesson explains the technique of tissue culture as used in plant transformation. It discusses important issues, such as
the use of selectable markers, genotype specificity, and tissue culture a...
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Transformation 2 - Transformation Methods
This lesson explains the procedure of introducing a new gene into a plant cell (transformation). It discusses the main goals
of the transformation process and describes the four main methods of tran...
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Transformation 3 - Transformation Events
This lesson defines an 'event'. It explains the determining factors specific to an event, the qualities of a desirable event, and
the identification and selection of desirable events.
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Transpiration - Water Movement through Plants
This lesson and its animation follows the journey of water through a plant from its uptake by roots to its evaporation from the leaf surface. How this journey is altered by plant characteristics such...
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Utilization of Grain by Swine and Poultry
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What is the importance of crop production in Nebraska and how do crops grow?
Subject:Introduction to Crop Production Grade Level(s): 4th – 12th grades
Time period: 1-3 hours (depending on activities conducted)
This lesson ...
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