At the ACCI, students are trained to do plant breeding, and most of the crops they work on are propagated by seeds and are self-pollinating. This detail is important because with crops like Bambara groundnut, tef and soybean, the process of circumventing the self-pollination process can be tricky, and determines how many crosses a breeder can make in a day. With tef, it’s around three per day, all under a microscope. Compare that with maize, where hundreds of crosses a day can be made.
The rest of the crops that the students work on are either out-crossing, such as maize and pigeonpea, or are propagated vegetatively by roots, tubers and cuttings, such as sweet potato. When breeding cassava, potato or sweet potato, only one perfect individual is needed from which to propagate new clones, and this can be done with cuttings or tubers.
A seed plant like maize, however, is much more time-consuming to breed to the stage of hybrids because a seed production programme is necessary, inbred parents must be maintained, and crosses and hybrid seeds must be produced, with testing at each generation.