Dairy Cattle Breeding Course

Lesson 1 • Basic Genetics for Cattle Breeders

Explains Mendelian inheritance, alleles, and gene expression in cattle. Provides the genetic vocabulary used throughout the course.

Lesson 2 • Reproductive Physiology Essentials

Describes the estrous cycle, hormonal regulation, and conception in dairy cows. Connects reproductive biology to practical breeding timing.

Lesson 3 • Bovine Anatomy and Body Systems

Covers skeletal, muscular, and digestive anatomy relevant to dairy production. Establishes the biological baseline needed for all subsequent breeding decisions.

Lesson 1 • Understanding Heritability Estimates

Defines heritability and explains its calculation from population data. Shows how heritability values guide the expected response to selection.

Lesson 2 • Variance Components and Breeding Value

Breaks total phenotypic variance into genetic and environmental components. Establishes the concept of true breeding value as the heritable portion of performance.

Lesson 3 • Genetic and Phenotypic Correlations

Explains how traits co-vary genetically and phenotypically. Helps students predict indirect selection responses across multiple traits.

Lesson 1 • Estimated Breeding Values and PTAs

Covers how EBVs and Predicted Transmitting Abilities are calculated and reported. Enables accurate comparison of bulls and cows across herds.

Lesson 2 • Selection Index Theory

Introduces the selection index as a tool for combining multiple trait records. Demonstrates how index weights reflect economic and genetic parameters.

Lesson 3 • Best Linear Unbiased Prediction

Explains BLUP methodology for estimating breeding values while accounting for fixed effects. Students understand why BLUP is the industry standard for genetic evaluation.

Lesson 4 • Reading National Genetic Evaluation Reports

Guides students through official sire and cow summary formats. Builds competency in extracting actionable data from published evaluations.

Lesson 1 • Complementary and Corrective Mating

Distinguishes complementary mating from corrective mating and their appropriate uses. Helps students avoid compounding weaknesses while improving target traits.

Lesson 2 • Inbreeding Management in Mating

Explains inbreeding coefficients and their effects on performance and fitness. Provides tools to limit inbreeding accumulation in planned matings.

Lesson 3 • Defining Herd Breeding Objectives

Guides identification of production, health, and functional trait goals for a specific herd. Aligns sire selection criteria with farm profitability targets.

Lesson 4 • Designing a Seasonal Mating Plan

Structures a complete mating plan aligned with calving targets and herd size. Integrates sire selection, inbreeding limits, and reproductive scheduling.

Lesson 1 • Embryo Transfer Fundamentals

Explains donor superovulation, embryo collection, grading, and transfer to recipients. Allows multiplication of superior female genetics beyond natural reproductive limits.

Lesson 2 • In Vitro Fertilization and OPU

Introduces ovum pick-up and in vitro fertilization as tools for elite cow multiplication. Compares IVF efficiency and cost with conventional embryo transfer.

Lesson 3 • Artificial Insemination Protocols

Covers semen handling, thawing, and insemination technique for optimal conception rates. Connects proper AI execution to the genetic gains planned in sire selection.

Lesson 4 • Sexed Semen Technology

Covers flow cytometry sorting, conception rate impacts, and strategic use of sexed semen. Guides decisions on when sexed semen improves genetic and economic outcomes.

Lesson 1 • Integrating Genomics into Herd Programs

Builds a workflow for routine genotyping of calves and integrating results into mating decisions. Demonstrates how genomic data improves selection accuracy at the herd level.

Lesson 2 • SNP Genotyping and Imputation

Describes low-, medium-, and high-density SNP panels and imputation to higher densities. Guides cost-effective genotyping decisions for different animal categories.

Lesson 3 • Genomic Inbreeding and Diversity

Uses runs of homozygosity to measure genomic inbreeding and monitor diversity loss. Connects genomic diversity metrics to long-term population fitness.

Lesson 4 • Principles of Genomic Selection

Explains how genome-wide marker data predicts breeding values with high accuracy. Demonstrates the reduction in generation interval achievable through genomic selection.

Lesson 1 • Fertility Trait Evaluation and Selection

Covers genetic evaluation of cow and heifer fertility traits and their economic importance. Guides selection for improved reproductive efficiency without sacrificing production.

Lesson 2 • Udder Health and Mastitis Resistance

Explains genetic parameters for somatic cell score and clinical mastitis resistance. Enables selection strategies that reduce mastitis incidence and treatment costs.

Lesson 3 • Longevity and Productive Life

Defines productive life and survival traits and their genetic evaluation methods. Shows how selecting for longevity reduces replacement costs and improves lifetime profit.

Lesson 4 • Metabolic Disease Resistance Traits

Covers genetic variation in ketosis, displaced abomasum, and hypocalcemia susceptibility. Integrates metabolic health traits into total merit index weighting.

Lesson 1 • Designing a Total Merit Index

Constructs a herd-specific total merit index by assigning economic weights to trait groups. Aligns index design with farm production system and market requirements.

Lesson 2 • Genetic Gain Equation and Its Components

Applies the breeder's equation to quantify annual genetic gain from selection intensity, accuracy, and generation interval. Identifies levers for maximizing rate of improvement.

Lesson 3 • Monitoring Genetic Trends and Benchmarking

Establishes methods for tracking genetic trend lines and comparing herd progress to breed averages. Enables data-driven adjustments to the breeding program.

Lesson 4 • Nucleus and Commercial Herd Structures

Explains nucleus breeding schemes and gene flow from elite to commercial populations. Helps students position their herd within a broader genetic improvement pyramid.