关键词: 桃, 桃, 种质资源, 遗传多样性, 核心种质

Abstract: In order to pyramid some desirable genes and breed super-wheat, the germplasm with different alien disease resistance were crossed to common wheat varieties(lines) by different parental combination. Large population was planted and the important family lines were selected by testing the yield in F3. Two new super-wheat lines, ShanMai107 with high yield and Shaanmai94 with strong-gluten, were bred. Shaanmai107 is 78cm, weak springness, multi spike, high percetenge of spike on the tiller, resistent to disease and lodging. Thousand kernal weight of ShanMai107 was 50g, and the yield reach 9712.5kg/hm2, which was 25.7% higher than the control cultivar Xiaoyan22. ShanMai94 is 75cm, weak-winterness, multi-spike, highly resistance to lodging, stripe rust, powdery mildew and leaf blight, and moderately resistant scab. one-thousand kernal weight of Shaanmai 94 was 51g and the yield was 8185kg/hm2, which was 6.0% higher than Xiaoyan22. The results showed that one of the effective way of breeding the ultra high-yield variety due to the materials of parent with abundant hereditary background, F2 expands the scale of planting, and examined yield in early generation.