特早熟玉米新品种晋单69号的选育及应用

Breeding and Application of New Extra-early Maize Hybrid Jindan 69

晋单69号是以自选系D993为母本、太早126-1为父本组配而成的玉米杂交种。该品种属特早熟品种,需≥10℃积温2 300℃左右;2008—2009年,在各级各类区域试验中表现早熟、高产、抗病、抗倒伏、优质;适宜春播特早熟区种植,种植密度以60 000～67 500株/hm2为宜,制种时父母本同期播种。

The new maize hybrid Jindan 69 was combined of two inbred lines D993 and Tail26-1. The inbred line D993 was used as the female parent and Tail26-1 male. Jindan 69 is an extra-early maturing hybrid. It needs accumulative temperature 2 300 ℃（ ≥ 10℃ ） to mature. The hybrid showed high yield at various experiment plots in various areas in 2008-2009. The result showed that it had earliness, very high ability of disease resistance, lodging resistance and high quality. The adaptive planting areas of Jindan 69 was the extra-early areas of Shanxi province where corn sowing in the spring. The plant populations were 60 000 67 500 plant/hm^2. The male and female were sowed in the same period when seed was propagated.