定燕2号以裸燕麦品7号为母本、皮燕麦定引1号为父本，采用人工有性杂交和系谱选育法培育而成。在2012 — 2014年的多点试验中，3 a 16点(次)籽粒平均折合产量3 381.00 kg/hm2，较对照品种定引1号增产5.5%，鲜草平均产量49 975.50 kg/hm2，较对照品种定引1号增产8.4%。定燕2号生育期115 d，株高128 cm，穗长24 cm，主穗铃数44.51个，单株粒数82.88粒，单株粒重2.16 g，千粒重27.07 g，容重425 g/L，经济性状优良。籽粒淡黄色，纺锤型，含粗蛋白(干基)181.8 g/kg、粗脂肪(干基)46.6 g/kg、粗灰分(干基)40.2 g/kg、赖氨酸(干基)4.3 g/kg、亚油酸(干基)43.71 g/kg。抗旱、抗红叶病、丰产稳产性好，适宜在甘肃中部干旱半干旱地区、甘南、青海和内蒙古等同类地区种植。

Dingyan 2 is a newly bred dryland forge oat cultivar by parental combination of nake oats Ping 7 with Avena sativa Dingyin 1， using sexual hybridization and pedigree breeding method development. In 2012 — 2014， the average grain yield of the cultivar reached 3 381.0 kg/hm2， which is 5.5% higher that of the check Dingyin 1 at 16 points(times) in multi-site tests， the average fresh yield reached 49 975.50 kg/hm2， which is 8.4% higher that of the check Dingyin 1. The result shows that the growth period is 115 days， height is 128 cm， lenght is 24 cm， main spike bolls is 44.51， grain number per plant is 82.88， grain weight per plant is 2.16 g， 1 000 seed weight is 27.07 g， bulk density is 425 g/L and economic characters of excellent. The grain is pale yellow， spindle-shaped， crude protein is 181.8 g/kg (dry basis)， crude fat is 46.6 g/kg (dry basis)， crude ash is 40.2 g/kg (dry basis)， lysine is 4.3 g/kg (dry basis)， linoleic acid is 43.71 g/kg (dry basis). In addition， it is drought resistant， disease resistance， high yield and stable yield. It is suitable to be grown in middle arid and semi-arid regions of Gansu and Gannan， Qinghai and Inner Mongolia and other similar ecological type areas.

S512.6

国家燕麦荞麦产业技术体系定西综合试验站建设专项(CARS-08-E-2)部分内容。