HUANG Wan-ting
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031WANG Qian
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031ZHANG Ze-yan
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031ZHU Hui-jun
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031YAN Hu-bin
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031ZHANG Yao-wen
College of Agronomy, Shanxi Agricultural University, Taiyuan 030031College of Agronomy, Shanxi Agricultural University, Taiyuan 030031
Foundation projects: Shanxi Basic Research Program Project (20210302124504); The Ph.D. of Shanxi Agricultural University Scientific Research Start-up Project (2021BQ43); The Shanxi Province Doctoral Graduates, Postdoctoral Researchers Come to Shanxi Province to Work Incentive Fund Scientific Research Project (SXBYKY2021050); The Shanxi Academy of Agricultural Sciences Institute of Crop Science Doctoral Fund Program (ZB1101)
Seed coat color is an important agronomic trait that associates with crop domestication and serves as morphological marker. In mung bean, the seed coat color was related to the content of flavonoids. Cloning and application of seed coat color-related genes becomes of interest in development of new mung bean varieties with improved nutritional properties. In this study, the varieties 'Jilv 9' (black seed coat) and 'Ziyuan 330' (yellow seed coat) were used as parents to generate an F2 segregating population. The BSA-seq approach was applied for mapping of the genes underlying the seed coat color. The association analysis using integrated SNPs and InDels suggested an interval of 3.26 Mb harboring 324 predicted genes, of which 49 genes were found with non-synonymous mutation and 15 genes were detected with frameshift mutation. By further use of 11 high-quality KASP markers in fine mapping, the candidate interval was finally delimited between KA330 and KA421 in the physical interval of 16,302,330-18,013,421 bp (1.71 Mb) on chromosome 4. The transcriptome data analysis and qRT-PCR expression analysis suggested six differently-expressed candidate genes, of which the LOC106758748 was annotated as a transcription factor MYB90 that was reported with a function in the flavonoid biosynthesis and served as key candidate gene regulating the seed coat color in mung bean. The results of this study can provide a theoretical basis for the cloning and utilization of the genes related to seed coat color in mung bean seed breeding.