Chicken Gene Map Could Transform Chick Breeding

A new genetic atlas of chickens could give breeders a much more detailed way to identify traits linked to disease resistance, growth and reproduction. Researchers led by the University of California, Davis, have developed what they describe as the first comprehensive map showing how genetic variation influences gene activity in chickens.

The research forms part of the international FarmGTEx initiative, which aims to connect genetic differences with biological functions and important agricultural traits. Instead of looking only at which DNA variants a bird carries, the new resource examines how those variants influence gene expression and RNA processing across tissues.

Beyond traditional genetic selection
Conventional breeding has successfully improved growth, feed efficiency and production performance, but the new research could add another layer of information to selection programs.
The UC Davis team examined genetic regulation across more than 100 chicken breeds and 28 tissues, creating a resource that can help researchers determine why particular genetic variants produce different biological responses.

This could eventually allow breeders to select parent stock using genetic signals associated with resilience, rather than relying exclusively on observable production traits.

Disease resistance in the spotlight
One of the most promising applications is poultry health. According to UC Davis, the atlas could help researchers identify birds with naturally greater resistance to infections such as avian influenza.
This is particularly significant because disease resistance is influenced by complex interactions between numerous genes and biological pathways. Earlier work from the same research group identified genes and signaling pathways associated with differences in chicken responses to avian influenza infection.
The new atlas provides a broader framework for investigating these mechanisms.

What could this mean for future chicks?
For hatcheries and breeding companies, the potential impact is upstream: better-informed selection of breeder parents could eventually produce chicks with more predictable biological resilience.
However, the researchers are not presenting the atlas as an immediate breeding tool. Further validation is needed to establish which genetic signals consistently translate into useful traits under commercial conditions.
The major breakthrough is the ability to connect chicken DNA variation with the biological processes occurring inside different tissues. As genomic technologies become increasingly integrated into breeding programs, this type of information could help shift chick production toward selection for both productivity and resilience.
Source: avinews.com