Scanning the genomes of more than 100,000 people from all over the world, scientists report the largest set of genes discovered underlying high cholesterol and high triglycerides — the major risk factors for coronary heart disease, the nation’s number one killer. Taken together, the gene variants explain between a quarter and a third of the inherited portions of cholesterol and triglyceride measured in the blood. The research, representing scientists from 17 countries, appears in two papers in the Aug. 5 issue of Nature.