Transcriptomic data of peach varieties with different chilling requirement levels

Peach is a deciduous tree widely cultivated in temperate and subtropical regions that requires a process of bud endodormancy to produce normal flowering and fruiting. This release requires a certain accumulation of cold, named chilling requirement (CR). CR is genotype dependent and with varies levels among different species and accessions. Thus, we collected the bud transcriptomic data of two peaches with different CR levels and conduct a series standard basic analysis. The peach bud transcriptomic data we gathered provides a valuable dataset for exploring the relationships between gene expression and peach CR levels.

We extracted and sequenced the RNA of different CR peach buds at the same status in three endodormancy stages. Each stages have three biological replicates. A total of 18 RNA-seq libraries were obtained and mapped to the reference genome after quality control. The gene expression level was normalized by two methods (TPM and FPKM). Differentially expressed genes (DEGs) analysis revealed that a total of 2,481 unique genes with an absolute value of log2 fold change (FC) greater than 1.0. Homologous functional annotation of these DEGs were conducted which provided further information for CR potential related genes identified and functional genomics studies.