A genome is the complete set of instructions needed to build an organism and allow it to grow and develop. The genome sequence of any organism helps to understand its evolution and lays a foundation for the functional characterization means for understanding the genetic basis of differences between plants and other eukaryotes, and provides the foundation for detailed functional characterization of plant genes. The discovery of DNA as a genetic material has revolutionized the science and researchers striving to decode the genetic information. The arrival of next generation sequencing technologies has reduced the time and cost required to generate draft genomes. In citrus group, 9 species were sequenced, several assemblies were available in public domain and several were in pipeline. The analysis of genomes unraveled the origin, evolution of citrus species and identification genes involved in the characters typical to citrus like apomixis, vitamin C synthesis.