Plant breeding, also referred to as cultivar development, crop improvement, and seed improvement, is a science-driven creative method for producing new plant varieties. Breeding is the process of creating multi-generation genetically varied populations on which human selection is used to develop adaptable plants with new combinations of desirable features. Biological evaluation in relevant target environments, as well as knowledge of genes and genomes, drive the selection process. Gain under selection, which is a function of genetic variation, selection intensity, and time, is used to measure progress. Plant breeders all across the world have created hybrids and new plant varieties.