To select genes associated with the high-temperature tolerance from Brassica, two transcriptomic analyses have been used: microarray and RNA Seq. Using two contrasting inbred lines of B. rapa, Chiifu and Kenshin, version 3 microarray (135 K microarray) was conducted to RNA samples extracted from series of 45℃-treated leaves and 29 genes were selected for genomic DNA cloning of cabbage. Of 29 genes, 8 genes contain 40 SNPs, 11 SSRs and 23 In-Del markers that distinguish high-temperature tolerant and susceptible cabbages, BN1 and BN2. These 8 genes include a unknown gene, AP2, SMP, FBD, SKP2B, IAA16, HSP21 and OLI2-2. We also selected 16 cabbage genes from RNA Seq analysis using two inbred lines, BN1 and BN2: 5 genes for BN1-high expression, 5 genes for BN1-specific expression, 5 genes for BN2-specific expression, and BoCaMB. Using RNA sequences, genomic DNAs corresponding to 16 genes have been clones and analyzed to find out molecular markers. Markers were further transformed into PCR-based marker and confirmed with additional cabbage genetic lines. We are currently transforming PCR-makers into SNP markers. To examine function of high-temperature tolerant genes, we also transformed 5 genes into Arabidopsis plants. We will describe detailed methods and results in a poster. [This work was supported by a grant from the Next-Generation BioGreen 21 Program (the Next-Generation Genomics Center No. PJ009085), Rural Development Administration, Republic of Korea]