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FOOD & AGRICULTURESCIENCE AND TECHNOLOGY
Home›FOOD & AGRICULTURE›Genetically modified animals

Genetically modified animals

By Abdallah el-Kurebe
June 24, 2018
211
0

Despite its potential to battle disease and hunger, genetically engineered food is still controversial
By Ian Tucker

Pigs

Last week, scientists from the University of Edinburgh’s Roslin Institute announced they had deleted the section of DNA that leaves pigs vulnerable to porcine reproductive and respiratory syndrome, which is estimated to cost European farmers £1.5bn a year in loss of livestock and decreased productivity. Genetically modified animals are banned from the EU food chain, but since this is a new and different technique it’s possible they’ll be appearing in bacon sandwiches in a few years.

A genetically modified mosquito emerges from its pupa.
 A genetically modified mosquito emerges from its pupa. Photograph: Oxitec

Mosquitoes

British company Oxitec has created genetically modified male mosquitoes that carry a “self-limiting gene”. When they are released into the wild and mate with females their offspring do not reach adulthood, so crucially do not contribute to the spread of the Zika virus. Other researchers are looking at using genetic modification to curb the spread of malaria.

Rosita Isa, a cow genetically modified to produce human-like milk.
 Rosita Isa, a cow genetically modified to produce human-like milk. Photograph: INTA (National Agricultural Technology Institute Argentina)

Cows

Scientists in both China and Argentina have genetically engineered cows to produce milk similar in composition to that made by humans. After modifying embryos, an Argentinian cow – Rosita Isa – was born that expressed milk containing proteins present in human milk but lacking in cow milk. However, there are a number of scientific, safety and taste issues that would have to be overcome before this replaces “mother’s milk” for infants.

Gene-edited chicks at the Roslin Institute.
 Gene-edited chicks at the Roslin Institute. Photograph: Courtesy of Valerie White/Norrie Russell/Roslin Institute

Chickens

The Roslin Institute is working on GM chickens that contain an extra gene that interrupts the transmission of avian flu. Unlike a vaccination, the modification still protects the bird if the virus mutates. However, some farmers argue it is better to enforce good farming practices than create disease-free animals.

One of AquaBounty’s genetically engineered salmon behind a regular salmon of the same age.
 One of AquaBounty’s genetically engineered salmon behind a regular salmon of the same age. Photograph: AquaBounty Technologies

Salmon

Last year, the Canadian authorities allowed a GM salmon designed by US company AquaBounty to be sold to consumers. It is engineered to reach market size in 18 months, half the time of its natural counterpart. However, the fish is not labelled GM in shops.A recent survey found 90% of Canadians are in favour of clearer food labelling. The Gurdian

TagsAnimalsGeneticsGM
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