黑龙江省地处高纬度、长日照的寒冷地区,热量资源偏低,高粱生产常因低温而遭受冷害。开展耐低温高粱的选育是提高我省高粱单产水平,使高粱生产高产稳产的重要措施。高粱是对低温最敏感的农作物之一。Rhykerd 和 Doggett 等(1970年)研究提出,高粱生长的最低温度为16℃左右。在北部种 Heilongjiang Province is located in high latitudes and long sunshine in cold areas, with low heat resources, and sorghum production is often chilled due to low temperatures. To carry out selection of low temperature resistant sorghum is to improve the level of sorghum yield in our province, so that sorghum production of high and stable yield an important measure. Sorghum is one of the most sensitive crops to low temperatures. Studies by Rhykerd and Doggett et al. (1970) suggest that the minimum temperature for sorghum growth is about 16 ° C. In the north species