从龙单13玉米品种双亲自交系的特征特性着手,研究了影响龙单13制种产量和质量的主要因素,提出了优质、高产制种综合配套技术措施。 Starting from the characteristics of parents inbred lines of Longdan 13 maize varieties, the main factors affecting the yield and quality of Longdan 13 were studied, and the comprehensive supporting measures of high quality and high yielding seed production were put forward.