PepsiCo Inc said it had elected an adviser at Nelson Peltz’s Trian Fund Management to its board, signaling a truce between the company and the activist investor following his two- year push to split the snack and beverage maker. William Johnson, a former chairman and chief executive officer of H.J. Heinz Co, will join the board effective March 23, and he will also be included in the slate of nominees for election to the board at the company’s 2015 annual shareholders’ meeting, PepsiCo said. In July, Peltz said he would consider launching a proxy fight at PepsiCo.