早熟春玉米杂交种龙单20的选育及应用

The Application and Breeding of Early-mature Spring Maize Hybrid Longdan 20

龙单20(黑334)是黑龙江省农科院玉米研究中心以自交系HR25为母本,龙抗11为父本杂交育成的玉米单交种。该品种属早熟春玉米品种。1996～2002年在各级各类试验及生产中表现出高产、优质、抗病和适应性好等特点,产量在8500～9000kg/hm2,适宜在早熟春玉米区种植,种植密度以5万株/hm2为宜。

The early-mature spring maize hybrid Longdan20is crossed by self-selecting inbred HR25(Female)and Longkang11(Male)by Maize Research Center,Heilongjiang Academy of Agricultural Sciences.It showed high yield,good quality,diseases resistance,good adaptability in the plot and performance test during1996～2002.The average yield is8500～9000kg /ha.The suitable density planting in the proper early-mature spring maize area is50000plants per hectare.