陇油21号是以青油14号为母本、青海大黄为父本选育的甘蓝型春油菜品种。在2014 — 2015年极早熟春油菜区域试验中，平均折合产量为2 846.85 kg/hm2，较对照品种甘南4号增产55.58%。陇油21号生育期112 d，株高127 cm左右，一次有效分枝数2～5个，单株果数114个左右，角粒数26.95粒，千粒重3.73 g。花期集中，株型较矮。含油量(粗脂肪)423.2 g/kg，芥酸含量2.6 g/kg，硫苷含量14.74 μmol/g，品质达到国家双低标准。适宜在甘肃张掖、武威、甘南、定西等海拔2 400 m以上春油菜地区种植。

Longyou 21 is Brassica nape cultivar with Qingyou 14 and Qinghaidahuang. In 2014 — 2015， the average yield was 2 846.85 kg/hm2， 55.58% higher than the control Gannan 4 in the Regional Test Sites of extremely early-maturing spring rapeseed. The growth period is 112 days， plant height was about 127 cm， the number of effective branches at one time is 2～5， the number of fruit per plant about 114， the number of kernels is 26.95， 1 000-grain weight is 3.73 g. The flowering period was concentrated， the plant type was short. The oil content(crude fat) is 423.2 g/kg， ethnic acid content is 2.6 g/kg， glucosinolates content is 14.74 μmol/g， the quality reached the federal double-low standard. It is suitable to be grown in above 2 400 m in Zhangye， Wuwei， Gannan， Dingxi areas.

S565.4

甘肃省科技厅重大专项(17ZD2NA016-4)；甘肃省农业科学院科技支撑计划(2016GAAS02)；甘肃省农业科学院院科研条件建设项目(2017GAAS22)。