高产优质玉米新品种桂单903的选育与应用

Breeding and Application of Guidan 903,a New High-yield and Good-quality Maize Variety

【目的】为满足广西乃至西南区玉米品种更新换代需求,不断提高玉米的产量与品质。【方法】广西壮族自治区农业科学院玉米研究所2016年以自选系GRL17349为母本、自选系GRL21191为父本进行杂交选育玉米新组合。【结果】2020年育成高产优质大穗型玉米新品种桂单903,该品种在广西区域试验和生产试验平均产量分别为7429.5kg/hm^(2)和7000.5kg/hm^(2),分别比对照(桂单162)增产6.3%和5.6%;籽粒容重782g/L,粗蛋白9.41%,粗脂肪6.19%,粗淀粉71.45%,赖氨酸0.35%。【结论】桂单903于2020年6月通过广西壮族自治区农作物品种审定委员会审定(桂审玉2020083号),该品种抗倒、抗病性强,品质优良,丰产、稳产性好,适应性广,适宜广西全区推广种植;制种技术简单,产量高,成本低。

【Objective】The purpose of the study is to meet the demand of variety replacement of corn in Guangxi and Southwest China,and to improve the yield and quality of corn continuously.【Method】Maize Research Institute of Guangxi Academy of Agricultural Sciences is taken self-selected line GRL17349 as female parent and self-selected line GRL21191 as male parent to breed new corn combinations.【Result】Guidan 903,a new high-yield and good-quality corn variety with big ear,was successfully bred in 2020.The average yield of Guidan 903 in regional test and production test of Guangxi is 7429.5 kg/hm^(2) and7000.5 kg/hm^(2) respectively,6.3%and 5.6%higher than those of CK(Guidan 162)separately.Seed density,crude protein,crude fat,crude starch and lysine are 782 g/L,9.41%,6.19%,71.45%and 0.35%respectively.【Conclusion】Guidan 903 was approved by Guangxi Crop Variety Approval Committee in June,2020(Guishenyu 2020083).The variety has the advantages of lodging-resistance,disease-resistance,excellent quality,high and stable yield,and extensive adaptability,which is suitable for popularization and cultivation in Guangxi.The seed production technology is simple,the yield is high and the cost is low.