[Genome-wide identification, characterization, and expression analysis of MAPK genes in response to infection in ].

In recent years, the spread of clubroot disease caused by infection has seriously affected the yield and quality of (L.) Czern.. The cascade of mitogen-activated protein kinases (MAPKs), a highly conserved signaling pathway, plays an important role in plant responses to both biotic and abiotic stress conditions. To mine the MAPK genes related to clubroot disease resistance in . , we conducted a genome-wide analysis on this vegetable, and we analyzed the phylogenetic evolution and gene structure of the MAPK gene family in mustard. The 66 BjuMAPK genes identified by screening the whole genome sequence of . were unevenly distributed on 17 chromosomes. At the genomic scale, tandem repeats led to an increase in the number of MAPK genes in . . It was found that members of the same subfamily had similar gene structures, and there were great differences among different subfamilies. These predicted -acting elements were related to plant hormones, stress resistance, and plant growth and development. The expression of , , , and were down-regulated or up-regulated in response to . infection. The above results lay a theoretical foundation for further studying the functions of BjuMAPK genes in . in response to the biotic stress caused by clubroot disease.