Scientists have produced gene-edited animals they say could serve as "super dads" or "surrogate sires". The pigs, goats, cattle and mice make sperm carrying the genetic material of donor animals.
The researchers used a hi-tech gene editing tool to knock out a male fertility gene in animal embryos. The animals were born sterile, but began producing sperm after an injection of sperm-producing cells from donor animals.
The technique would enable surrogate males to sire offspring carrying the genetic material of valuable elite animals such as prize bulls, said a US-UK team. This would be a step towards genetically enhancing livestock to improve food production, they added.
Also at Reuters [reuters.com].