# Decoding Quantitative Traits in Yaks: Genomic Insights for Improved Breeding Strategies

## TL;DR

This paper reviews how genomic tools can improve yak breeding by better understanding genetic traits and enhancing breeding strategies.

## Contribution

The paper provides a framework for integrating genomic technologies into yak breeding programs to improve efficiency and genetic gains.

## Key findings

- Modern genomic tools like MAS and GP can enhance yak breeding strategies.
- Key components like phenotypic assessment and high-throughput genotyping are critical for genomic breeding pipelines.
- Genomic technologies can help preserve yak genetic diversity while accelerating genetic progress.

## Abstract

The yak (Bos grunniens), the only large domesticated species endemic to the Qinghai–Tibet Plateau, is a vital resource for local livelihoods and regional economic sustainability. However, yak breeding faces significant challenges, including limited understanding of the genetic architecture underlying quantitative traits, inadequate advanced breeding strategies, and the sterility of hybrid offspring from yak–cattle crosses. These constraints have hindered genetic progress in key production traits. To address these issues, integrating modern genomic tools into yak breeding programs is imperative. This review explores the application and potential of molecular marker-assisted selection (MAS) and genomic prediction (GP) in yak genetic improvement. We systematically evaluate critical components of genomic breeding pipelines, including: (1) phenotypic trait assessment, (2) sample collection strategies, (3) reference population design, (4) high-throughput genotyping (via genome sequencing and SNP arrays), (5) predictive model development, and (6) heritability estimation. By synthesizing current advances and methodologies, this work aims to provide a framework for leveraging genomic technologies to enhance breeding efficiency, preserve genetic diversity, and accelerate genetic gains in yak populations.