旱地燕麦新品种定莜6号的选育及其特征分析

Study on the cross breeding and the germplasm characters of a new dryland oat variety

以7633-112-1作母本,蒙燕146作父本,采用有性杂交技术和系谱选育法,在20多年选育试验基础上培育出定莜6号新品种。试验鉴定结果表明：与定莜1号相比,该品种区试增产14.1%,平均产量2 022.6kg/hm2;株高66-120 cm,穗长13-26.5 cm,千粒重17.6-22.8 g,生育期85-113 d;粗蛋白含量20.86%,粗脂肪7.25%,赖氨酸0.886%,亚油酸43.47%（占不饱和脂肪酸比重）;抗旱性强,丰产性好,品质优,抗坚黑穗病,适宜在甘肃中部干旱半干旱山区及同类地区推广种植。

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.