为解决内蒙古大面积种植的地方谷子品种小香米生育期长、不适宜机械化收获、不抗除草剂、易感白发病等局限性，内蒙古自治区农牧业科学院作物科学研究所谷子课题以小香米为母本，以中矮秆、抗除草剂的中熟夏谷材料15K1206为父本配制杂交组合，通过南繁北育选育出兼具小香米优点且抗除草剂的谷子新品种蒙谷2号。在2020 — 2021年进行的内蒙古自治区谷子新品种(系)多点试验中，蒙谷2号平均折合产量为5 142.30 kg/hm2，较对照品种小香米增产10.85%。在2021年进行的生产试验中，蒙谷2号平均产量为4 118.70 kg/hm2，比对照品种晋谷21号增产11.66%。该品种生育期126 d，株高143.2 cm，茎粗0.87 cm，穗长25.6 cm，穗粗2.99 cm，单株穗重37.84 g，单穗粒重30.83 g，出谷率81.49%，穗码松紧适中。黄谷黄米，米质粳性，千粒重3.11 g。籽粒粗蛋白含量11.4 mg/g，粗脂肪含量3.8 mg/g，总淀粉含量75.3 mg/g，支链淀粉占总淀粉的77.4%，赖氨酸含量0.28 mg/g。中抗谷锈病、黑穗病、白发病。适宜在内蒙古呼和浩特市、鄂尔多斯市及同类生态区≥10 ℃的活动积温在2 650 ℃以上的地区春播。

To address the limitations such as long growth period, unsuitable for mechanized harvesting, not resistant to herbicides, susceptible to white hair disease of the dominant local millet variety Xiaoxiangmi, the new millet variety Menggu 2 which shows the merits of Xiaoxiangmi and herbicide resistance was bred by crossing female parent Xiaoxiangmi and male parent 15K1206. In the multi-point test of millet varieties(lines) in Inner Mongolia Autonomous Region from 2020 to 2021, the average yield of Menggu 2 in 2 years was 5 142.30 kg/ha, which was 10.85% higher than that of the control variety Xiaoxiangmi. In the production test in 2021, the average yield of Menggu 2 was 4 118.70 kg/ha which was 11.66% higher compared with that of the control variety Jingu 21. The growth period of the variety was 126 d, plant height was 143.2 cm, stem diameter was 0.87 cm, spike length was 25.6 cm, spike diameter was 2.99 cm, spike weight per plant was 37.84 g, grain weight per spike was 30.83 g, grain yield rate was 81.49%, spike code was loose and tight showing yellow rice with japonica rice quality. 1000-grain weight was 3.11 g, crude protein content was 11.4 mg/g, ether extract content was 3.8 mg/g, total starch content was 75.3 mg/g in which amylopectin accounted for 77.4 % of total starch, lysine content was 0.28 mg/g. It is suitable for planting in the similar ecological area of Hohhot and Ordos in Inner Mongolia with active accumulated temperature ≥10 ℃ and above 2 650 ℃ in spring.

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内蒙古科技计划项目(2021GG0375)；内蒙古农牧业创新基金项目(2021CXJJN02)；国家现代农业产业技术体系(CARS-06-14.5-B11)；内蒙古自治区科技重大专项(2020ZD0005)。