定西48号是以自育品系7021为母本、临8为父本，经过有性杂交选育而成。2016 — 2017年参加甘肃省旱地春小麦区域试验，2 a 10点(次)平均折合产量2 710.70 kg/hm2，较对照品种西旱2号增产14.01%。定西48号生育期101 d，幼苗习性直立，叶色深绿，株高96.2 cm，穗长8 cm，穗长方形，籽粒饱满、红色，硬质，籽粒千粒重49.9 g，容重715.1g/L。粗蛋白(干基)含量147 g/kg，湿面筋309 g/kg，沉降值33.0 mL，赖氨酸4.0 g/kg。适宜在海拔1 700～2 300 m，年降水量350～400 mm的甘肃中部半干旱地区旱地种植。

Dingxi 48 is bred by sexual hybridization with self-breeding line 7021 as female parent and Lin 8 as male parent. In 2016 — 2017， the average yield of 2 a 10 points (sites) was 2 710.70 kg/hm2 and 14.01% higher than that of Xihan 2 in Winter Wheat Regional Test in Dryland of Gansu Province. The growth period of Dingxi 48 is 101 days. The seedlings had erect habit， dark green leaves， plant height is 96.2 cm， panicle length is 8 cm， rectangular panicle， red and hard grains， full grains， 1 000-grain weight is 49.9 g and bulk weight is 715.1 g/L. The content of grain crude protein(dry base) is 147 g/kg， wet gluten is 309 g/kg， sedimentation value is 33.0 mL， lysine is 4.0 g/kg. It is suitable to be grown in semi-arid areas of central Gansu with an annual precipitation of 350～400 mm and an elevation of 1 700～2 300 m.

S512.1

甘肃省科技重大专项“甘肃中部旱地小麦新品种选育及示范推广”(17ZD2NA016-7)；甘肃省现代农业小麦产业体系“中部抗旱优质春小麦育种”(GARS-01-04)；甘肃省科协青年科技人才托举工程“陇中优质旱地小麦新品种育繁推一体化”(甘科协发[2018]135号文件)部分内容。