Plant genomics focuses on the genetic makeup of the plants and their mapping. It gives importance to the creature’s genome and its characterization.It is a very important aspect of the plant science in which it gives a very detailed insight of the plant at the gene level. In this area of plant science the study applies system biology, Bioinformatics, DNA sequencing to give a detailed insight at the genetic level of plants. The plant genomics helps in developing the understanding of relationship between alleles and loci.With the knowledge of the plant at their genetic level it is easy to map and trace the hereditary graph of the plants. It is a very useful study in plant science.