Breeding for elite germplasm is important for selection of elite soybean varieties.It has taken nearly 20 years to breed the elite line Lu99-2.Through selecting parents,breeding SCN-resistant and SMV-resistant lines,testing the resistance to SCN and SMV of the lines and testing the seeds for oil and protein.All of the resistances grades of Lu99-2 to race 1,race 3,and race 5 of SCN and to y 6 of SMV are 1.The oil content in seeds varied between 21.4% and 22.67% the protein content varied between 42.7% and 45.0%,and the total of oil and protein contenes varied between 64.85% and 66.4%.