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To understand better the mechanisms of the pigment accumulation in ornamental pepper, the fruit color, pigment and expression of carotenoid biosynthetic genes were investigated. The test materials were divided into three categories. The first category included cultivars B3, J1, J2 and Q3, the second were M3, M3′, W8 and WU, C2, S1, W3 and W4 belonged to the third category. The pigment changes during ripening were characterized by loss of chlorophyll and anthocyanin, and a rapid accumulation of carotenoids. It was found that GGPS, PSY, CRTZ-2 and CCS genes have abundant transcription during the accumulation of carotenoids in ornamental pepper, which have a more important regulatory function. Correlation analysis were conducted between fruit color, pigment and expression of genes, it showed that there were significant correlation between key genes of carotenoid biosynthetic pathway, among …