冬小麦新品种天选55号为天水市农业科学研究所小麦育种中心以9589-8-1-2-1为母本、95-111为父本进行有性杂交，采用系谱法经多年选育而成。在2011 — 2013年甘肃省冬小麦陇中片旱地组区域试验中，2 a折合产量4 316.55 kg/hm2，较对照品种陇中1号增产5.41%。该品种株高93～102 cm、穗长8.8 cm、千粒重49 g、容重812 g/L。籽粒含粗蛋白147.2 g/kg、湿面筋264.6 g/kg，沉降值25.5 mL。经接种鉴定，苗期对混合菌表现中抗，成株期对水4、贵22-14、贵22-9、条中33号、条中32号和混合菌均免疫，主要适宜于天水、陇南、平凉地区及定西东南部海拔1 800 m以下地区旱地种植。

Tianxuan 55 is a newly bred winter wheat cultivar by parental combination of 9589-8-1-2-1/95-111. The average yield Tianxuan 55 is 4 316.55 kg/hm2， which is 5.41% higher than that of the check in winter wheat regional test conducted in the Longzhong district in the period 2011 — 2013. In addition， the plant heigth is 93～102 cm， ear length is 8.8 cm， thousand grain weight is 49 g， bulk weight is 812 g/L， seed crude protein is 147.2 g/kg， wet gluten is 264.6 g/kg and settlement of value is 25.5 mL. By inoculating indentification， the result shows that Tianxuan 55 has moderate resistance to at the seeding stage and immune completely to Shui4， Gui 22-9， Gui 22-14， CY 33， CY 32 and mixture race at the adult stage. It is suitable to plant at an altitude of 1 800 meters of Tianshui， Longnan region， Pingliang， Dingxi southeast region.

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甘肃省科技支撑计划项目(1504NKCE115)、天水市科技支撑计划项目“小麦抗旱抗锈优异资源发掘及种质创新与利用”部分内容。