The nation’s top business and labor groups were near agreement Friday on a guest worker program for low-skilled immigrants, closing in on a deal that would eliminate one of the last significant obstacles to a new proposal for a broad overhaul of immigration laws.

Peri & Sons, a Nevada-based onion grower, has agreed to pay a record total of $2.3 million in back wages to 1,365 workers, along with a civil penalty of $500,000 for violations under the H-2A program.