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The dogs, which are test tube bred in a lab, have twice the muscle mass of their natural counterparts and are considerably stronger and faster. The canine genome has been especially difficult to engineer and replicate – but its close similarity to the human genome means it has long been the prize of geneticists. Now the Chinese success has led to fears the same technology could be used to create weaponised super-humans - typifed in Marvel Comics by Captain America and his foes.

MARVEL•EYEVINE China have begun to breed ‘super dogs’ with twice the muscle of a normal dog

David King, director of Human Genetics Alert (HGA), voiced his fears over what is widely viewed as the first step on a slippery slope. He told express.co.uk: “It’s true that the more and more animals that are genetically engineered using these techniques brings us closer to the possibility of genetic engineering of humans. “Dogs as a species, in respect of cloning are very difficult, and even more difficult to clone human beings. “There’s no medical case for it, the scientists are interested in being the first person in the world to create a genetically engineer child.

In terms of genetic engineering we will be seeing this more and more David King, director of Human Genetics Alert

“They’re interested in science and the technology and their careers. They will continue pushing the regulations for it. “That does set us on the road to eugenics. I am very concerned with what I’m seeing.” An army of super-humans has been a staple of science fiction and superhero comics for decades – but the super-dog technology brings it closer to reality. The Chinese researchers first self-bred cloned dog was named Little Long Long.

SINO GENE Nine-day-old Long Long was cloned from a genetically modified dog by Sino Gene in Beijing

The beagle puppy, one of 27, was genetically engineered by ‘deleting’ a gene called myostatin, giving it double the muscle mass of a normal beagle. The advance genetic editing technology has been touted as a breakthrough which could herald the dawn of ‘superbreeds’, which could be stronger, faster, better at running and hunting. The Chinese official line is that the dogs could potentially be deployed to frontline service to assist police officers. Dr Lai Liangxue, researcher at Guangzhou institute of biological medicine and health, said: "This is a breakthrough, marking China as only the second country in the world to independently master dog-somatic clone technology, after South Korea."

Inside China's Military Superpower Sat, November 11, 2017 An inside view of the Chinese military over 120 years. Play slideshow VCG via Getty Images 1 of 23 Armed police soldiers lift timbers during a drill on August 24, 2016 in Chongqing, China. As the highest temperatures reached over 40 degree Celsius at 5 districts in Chongqing, officers and soldiers of an armed police crop took outdoor training

Some 65 embryos were ‘edited’, and from that 27 were born, with Little Long Long the only one who was created without the myostatin gene. Myostatin is known to control muscle size in humans. Dogs are one of the hardest animals to clone, with only South Korea thought to have successfully created a clone in the past. As well as the enhancements, researchers said in the Journal of Molecular Cell Biology some dogs will be bred with DNA mutations in a bid to help medical research, including some which mimic Parkinson’s. Dr Lai added: "The goal of the research is to explore an approach to the generation of the new disease dog models for biomedical research.

GETTY The experiments success has led to fears that the experiments could be used to create super soldiers

"Dogs are very close to humans in terms of metabolic, physiological and anatomical characteristics." But some have criticised the experiments, citing ethical concerns. Mr King said: “This is the way its likely to proceed if the law is changed, first of all they will use it for medical purposes, most likely to treat a genetic condition. “In terms of genetic engineering we will be seeing this more and more.” There are also fears that, as well as medical, tinkering with genetics could also lead to a rise in designer or novelty pets. Dr Lai said his team have no intentions to breed the bulked up beagles as pets.

But Mr King also voiced fears that this breakthrough, coupled with existing cases of altering human embryos, could lead to further calls for designer babies. The director of HGA, and independent body, claimed there are multiple examples of eugenics going on already, citing women who are intelligent and beautiful are paid more for their eggs in the US. Mr King said: “It’s not scaremongering. “I’m seeing the beginning of a campaign within the scientific community to legalise human genetic engineering. “We’ve seen how it happened with the thee-parent embryo.

SINO GENE Hercules and Tiangou were bred by Chinese scientists to be twice as muscular as normal beagles