(AP) — A Texas jury has begun deliberations in a case that pits breeders who clone horses against a pre-eminent registry that refuses to list cloned animals.

The federal court jury began deliberating late Friday. They will resume Monday.

Rancher Jason Abraham and veterinarian Gregg Veneklasen filed suit in 2012 against the American Quarter Horse Association. Registered animals are more valuable.

The case is being closely watched by other U.S. horse-breeding groups because it could set a precedent. Currently, no U.S. horse breeder groups allow cloned animals to be registered.

The plaintiffs’ attorney argues the association is running a monopoly that violates federal and state anti-trust laws.

The registry says it can set its own rules, and some members oppose cloning for moral reasons.

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