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    Poultry Business – April 2025 issue

    By Chloe RyanApril 8, 2025
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Poultry News
Genetics

GM hens could lay eggs from other poultry breeds

Chloe RyanBy Chloe RyanFebruary 21, 20172 Mins Read
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Some chicks genetically modified to lay other breeds' eggs
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Hens that do not produce their own chicks have been developed for use as surrogates to lay eggs from rare breeds.

The advance – using gene-editing techniques – could help to boost breeding of endangered birds, as well as improving production of commercial hens, researchers say.

A team led by Dr Mike McGrew at The Roslin Institute at the University of EdinburghGM chicks used a genetic tool called TALEN to delete a section of chicken DNA. They targeted part of a gene called DDX4, which is crucial for bird fertility.

Hens with the genetic modification were unable to produce eggs but were otherwise healthy, the team found. DDX4 plays an essential role in the generation of specialised cells – called primordial germ cells – which give rise to eggs.

Researchers say that primordial germ cells from other bird breeds could be implanted into the chickens. The hens would then produce eggs containing all of the genetic information from the other breeds. The surrogate chickens are the first gene-edited birds to be produced in Europe.

Experts say they could potentially be used to help breed birds of other species, as long a supply of primordial germ cells is available from a donor bird, the team says.

Scientists from the US biotechnology company Recombinetics also worked on the project.

The study is published in the journal Development and was funded by strategic investment from the Biotechnology and Biological Sciences Research Council.

Dr Mike McGrew said: “These chickens are a first step in saving and protecting rare poultry breeds from loss in order to preserve future biodiversity of our poultry from both economic and climate stresses.”

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Chloe Ryan

Editor of Poultry Business, Chloe has spent the past decade writing about the food industry from farming, through manufacturing, retail and foodservice. When not working, dog walking and reading biographies are her favourite hobbies.

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