Sorghum, Sorghum bicolor (L.) Moench, is self-pollinated diploid species with 2n=20. It is an important and valuable crop. Thus, a continuing goal of plant breeders is to develop stable, high yielding sorghum lines and hybrids that are agronomically acceptable. The reasons for this goal are obviously to maximize the amount of grain, biomass, sugar, biofuel/acre, and/or total energy/acre produced on the land used and to supply food and fuel for both animals and humans with low cost. To accomplish this goal, the sorghum breeder must select and develop sorghum plants that have the traits that result in superior lines and hybrids.