EDINBURGH, Scotland (AP) _ The scientists who helped create Dolly the cloned sheep said Wednesday they are now trying to clone a pig.

A project in the works by Roslin Bio-Med, a company formed in April by the Roslin Institute in Edinburgh, hopes to help solve a worldwide shortage of donor organs. Cloning would allow pigs to be modified genetically so their organs can be transplanted into humans, the company said.

``We are currently working hard to produce a cloned pig,'' said Simon Best, its chief executive. ``Obviously, we have got some work to do, but we are hoping we can do it within the next year or so.''

Unlike Dolly, who was cloned from an adult sheep in 1996, scientists said they first will try to create a pig from fetal tissue.

``We are starting from an embryo cell because it is easier and quicker,'' Best said. ``Once we have cloned from an embryo, we will try to clone from an adult cell.''

Two groups in the United States also are working on pig cloning, Best said.

``When you are in a race, you cannot be absolutely certain of being first, but we think we are well-placed,'' he said.

Pigs are being targeted because, although not a close genetic relation to humans, their kidneys and hearts are similar in size and structure.

``Of all the animals available, they are the closest we can find,'' Best said. ``Chimps are not as big as we are, and gorillas are an endangered species.''