为推动甘肃省玉米生产发展，结合生产上的需求，通过种质资源创新与优异基因聚合育种，成功选育出高产、稳产、优质、抗病好的玉米新品种陇单336。玉米新品种陇单336是以BSK卡570为母本、BSKZ82为父本选育而成的杂交种，2014 — 2015年在甘肃多地进行品比试验，陇单336 2 a 32点平均折合产量10 080.0 kg/hm2，比对照品种德美亚3号增产8.8%，增产点率100%。在2020年北方早熟春玉米联合体生产试验中，陇单336平均折合产量11 172.0 kg/hm2，比对照品种德美亚3号增产349.5 kg/hm2，增产率3.2%。陇单336生育期平均为125.9 d，株高272.5 cm，穗位高102.5 cm，穗长18.5～19.2 cm，穗行数15.0～18.0 行，穗粗4.8～5.2 cm，千粒重372 g，出籽率84.3%。适宜在黑龙江、甘肃、内蒙古、宁夏、吉林、河北和山西等早熟春玉米区种植。

To promote the development of maize production in Gansu Province and meet practical needs, a new maize variety Longdan 336, which is high and stable yielding, high-quality, and disease-resistant, was successfully bred through germplasm innovation and superior gene aggregation. Longdan 336 is a hybrid developed using BSKKa570 as the female parent and BSKZ82 as the male parent. During 2014 to 2015, regional comparison experiment was conducted at 32 sites across Gansu in 2a, where Longdan 336 achieved an average yield of 10 080.0 kg/ha, 8.8% higher than the control variety Demeiya 3, with a 100% yield increase site rate. In the 2020 production experiment of the northern early-maturing spring maize consortium, Longdan 336 recorded an average yield of 11 172.0 kg/ha, an increase of 349.5 kg/ha or 3.2% over the control. This variety has an average growth period of 125.9 days, plant height of 272.5 cm, ear height of 102.5 cm, ear length of 18.5 to 19.2 cm, 15.0 to 18.0 kernel rows per ear, ear diameter of 4.8 to 5.2 cm, 1 000-kernel weight of 372 g, and kernel rate of 84.3%. It is suitable for cultivation in early-maturing spring maize regions such as Heilongjiang, Gansu, Inner Mongolia, Ningxia, Jilin, Hebei, and Shanxi.

S513

国家自然科学基金(32360511、32460510)。