The federal government has given the final OK to three more types of potatoes genetically engineered by Boise’s J.R. Simplot Co. to resist the pathogen that caused the Irish potato famine. They are safe for the environment and safe to eat, officials announced. The approvals by the U.S. Environmental Protection Agency and Food and Drug Administration last month mean Simplot is free to plant the potatoes this spring and sell them in the fall. The approvals apply to Simplot’s second generation of its Innate line of potatoes. The first generation already is sold in stores under the White Russet label. The company said the latest varities will have less bruising and fewer black spots, enhanced cold-storage capacity and a lower amount of a potentially carcinogenic chemical that is created when potatoes are cooked at high temperatures. More