Comparative Transcriptome Analysis Identified Genes Associated with Fruit Size in Pepper (Capsicum annuum L.)

Pepper (Capsicum annuum L.) is one of the most widely grown vegetable crops in China, with widespread cultivation worldwide. Fruit weight (size) a complex trait controlled by multiple factors and an essential determinant pepper yield. In this study, we analyzed transcriptome two recombinant lines different fruit weights, ‘B302’ ‘B400’, at five developmental stages to reveal some differentially expressed genes mechanisms controlling weight. The results showed that 21,878 differential were identified between specimens. Further analysis revealed Boron transporter 4 was significantly highly large-fruited almost not all small-fruited pepper. CaAUX1, CaAUX/IAA, CaGH3, CaSAUR, other related Auxin signal transduction pathway but reduced addition, comparison transcription times such as CaMADS3, CaAGL8, CaATHB13, CaATHB-40 pepper, these may be expansion. Through weighted gene co-expression network (WGCNA), MEorangered4 module shown have significant correlation weight, key modules constructing hub core interactions map regulating APETALA 2 found. conclusion, find expression relevant it hypothesized play roles development size occurring phytohormones regulate size.