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大天1号系罗平县大天种子公司于2000年用自育自交系0466作为母本、0518作为父本杂交组配选育而成的黄玉米单交种。2003～2004年参加曲靖市A组玉米区域试验,2004～2005年参加云南省青贮饲料玉米新品种区域试验。2003～2006年累计示范种植2943.3hm~2,平均产量9290kg/hm~2,比对照兴黄单892增产1394kg/hm~2,增幅为17.7%,
Big-day No. 1 Luo-day County Seed Co., Ltd. in 2000 with self-bred 0466 as the female parent, 0518 as a cross between the male parent breeding yellow corn single cross. From 2003 to 2004, he took part in the group A corn regional test in Qujing City and from 2004 to 2005 in the regional experiment of new silage corn variety in Yunnan Province. From 2003 to 2006, a total of 2943.3 hm ~ 2 was planted, with an average yield of 9290 kg / hm ~ 2, an increase of 1394 kg / hm ~ 2 compared with that of the control Hwangdan 892, an increase of 17.7%