| Taking 7633-112-1 as mother plant and Mengyan 146 as father plant, we used sexual crossing technology and pedigree selection method, and finally cultivated a elite dryland oat variety-Dingyou 6. The results showed that: In regional test, the yield of Dingyou 6 raised averagely by 14.1% compared with Dingyou 1, resulting in average production of 2 022.6 kg/hm2; The date of stem height, ear length, thousand-grain weight, growth period, crude protein content, crude fat, lysine, linoleic(percentage in unsaturated fatty acids) was respectively 13～26.5 cm, 17.6～22.8 g, 85～113 d, 20.86%, 7.25%, 0.886%, 43.47% and 66～120 cm; In addition, it has many other advantages, such as strong drought resistance, high output, super quality, anti-dustbrand, and suitable for arid and semiarid areas or similar areas of middle part of Gansu. |