Wheat is probably the most important crop in the world, yet it has one of the most challenging genomes. Bread wheat is a hexaploid, with three complete genomes termed A, B and D in the nucleus of each cell. Each of these genomes is almost twice of the human genome and consists of around 5,500 million letters. Several groups around the world are working towards sequencing wheat. Details of individual efforts can be found on the wiki below.
Genome sequencing projects can be generally divided into whole genome shotgun (WGS) methods or BAC by BAC methods.