We investigated the genetic diversity and structure of the 239 fixed lines with 47 simple sequence repeat (SSR) and 109 NGS-generated SNP markers evenly distributed in B. rapa genome. Phylogenetic analysis classified the vegetable fixed lines to four subgroups, with the three types forming a separate and relatively farther cluster. Population structure analysis identified four sub-populations corresponding to geographic origin and morphological traits, and revealed extensive admixture. The vegetable B. rapa fixed lines successfully developed in our study would be valuable materials for multinational B. rapa diversity resources establishment. Understanding the genetic diversity and population structure could be useful for utilization of the representing genetic variation and further genetic and genomic analysis.

• Xiaonan Li(Molecular Genetics and Genomics Lab, Department of Horticulture, Chungnam National University)
• Wenxing Pang(Molecular Genetics and Genomics Lab, Department of Horticulture, Chungnam National University)
• Su Ryun Choi(Molecular Genetics and Genomics Lab, Department of Horticulture, Chungnam National University)
• Yong Pyo Lim(Molecular Genetics and Genomics Lab, Department of Horticulture, Chungnam National University)