玉米是我国重要的饲料、工业原料和粮食作物。进一步提高我国玉米的单产水平，确保玉米生产自给率稳定在95%以上，对于保障我国粮食安全尤为重要。国内外实践表明，新品种对玉米增产的贡献率在50%以上，通过作物品种改良对提高粮食单产有极其重要的意义。然而近十多年来，玉米产量潜力提升缓慢，一个主要原因是对产量这个复杂性状的遗传解析进展缓慢。因此，本项目综合利用现代基因组学、生物技术和生物信息学与传统作物学相结合的手段，基于二代测序的高通量基因型分型技术，以包含324个DH双单系的IBM Syn 10 DH群体为永久作图群体，构建高密度SNP的Bin map遗传连锁图谱，同时对多环境鉴定的表型性状进行QTL/基因的精细定位，发现控制产量及其相关性状的关键基因，解析玉米产量及其相关性状的遗传基础，为挖掘玉米产量遗传潜力及提高单产等具有重要作用，为促进玉米高产新品种培育奠定基础，为保障国家粮食安全做出贡献。

Maize is an important fodder and raw materials of industry and grain crops. Therefore, it is of great importance for our country's food security by further improving the level of maize grain unit yield and ensuring a stable self-sufficient ratio more than 95% in China. It is showed that the contribution proportion of new varieties in crop production is more than 50% in both domestic and abroad, and thus it is essential to increase grain unit yield by crop breeding. Nevertheless, yield potential had gone through a slowly increase in recent 10 years. It is owing to the slow progress in the genetic dissection of complex traits of production. Therefore, combining with the comprehensive utilization of multidisciplinary means to study the relationship between the maize production and relevant traits, including modern genomics, biotechnology, bioinformatics, and traditional crop science and high-throughput genotyping-technology based on the next-generation sequencing. This project intends to construct a genetic linkage map with high density SNP bin map for the IBM Syn 10 DH permanent mapping population, detect the key genes which control the traits and then analyze the genetic background of maize yield. And then fine mapping of QTL/GENE for the phenotypic traits and relevant traits will be identified in multiple environments. So it is significant for tapping the genetic potential of maize yield and strengthens the food security of our county by increasing the grain yield and developing new maize varieties respectively.