20 ANOVA and Henderson’s Methods

Learning Objectives

By the end of this chapter, you will be able to:

Estimate variance components from a balanced half-sib design by ANOVA
Compute heritability and its standard error by hand
Describe Henderson’s Methods I, II, and III and their scopes
Show how unbalanced data breaks the ANOVA approach
Explain why these methods were superseded

Assumes Ch 3, Ch 7.

Chapter in progress

This chapter has not been written yet. The objectives above are the contract it will be written against — they are taken from CHAPTERS.md, which is the outline for the whole book.

Purpose. Where variance components came from before REML, and why they had to be replaced.

---
title: "ANOVA and Henderson's Methods"
---

::: {.callout-note icon=false}
## Learning Objectives

By the end of this chapter, you will be able to:

1. **Estimate** variance components from a balanced half-sib design by ANOVA
2. **Compute** heritability and its standard error by hand
3. **Describe** Henderson's Methods I, II, and III and their scopes
4. **Show** how unbalanced data breaks the ANOVA approach
5. **Explain** why these methods were superseded
:::

*Assumes Ch 3, Ch 7.*

::: {.callout-warning}
## Chapter in progress

This chapter has not been written yet. The objectives above are the contract it will be written
against — they are taken from `CHAPTERS.md`, which is the outline for the whole book.

**Purpose.** Where variance components came from before REML, and why they had to be replaced.
:::