18 Multibreed Models

Learning Objectives

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

Explain why one A and one variance are wrong across breeds
Model breed composition and heterosis as covariates
Define segregation variance and state when it matters
Build a breed-specific covariance structure
Explain metafounders as a generalization of unknown parent groups

Assumes Ch 9, Ch 11.

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. More than one breed in a single evaluation.

---
title: "Multibreed Models"
---

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

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

1. **Explain** why one **A** and one variance are wrong across breeds
2. **Model** breed composition and heterosis as covariates
3. **Define** segregation variance and state when it matters
4. **Build** a breed-specific covariance structure
5. **Explain** metafounders as a generalization of unknown parent groups
:::

*Assumes Ch 9, Ch 11.*

::: {.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.** More than one breed in a single evaluation.
:::