The government Friday approved the record $25 billion takeover of RJR NabiscoInc. by Kohlberg, Kravis Roberts & Co., but gave the Wall Street firm a year to divest brands which, as a result of the merger, dominate U.S. sales of oriental food, peanuts and ketchup.

The Federal Trade Commission's ruling allows KKR to keep most of the RJR Nabisco food and cookie conglomerate, which owns scores of well-known brands ranging from Oreo cookies to Winston cigarettes.But because it previously acquired another major food concern, Beatrice/Hunt-Wesson, the government said the combined food holdings would lead to excessive concentration in the three product lines.