The seeds generated in each cross
(Table 1) were sown in the nursery and the seedlings
(ranging between 101 and 272/population) were
transplanted to the field 3 months after sowing. The
progeny and their parents were evaluated for EB using
the fresh root yield, fresh shoot weight, number of
tuberous roots and harvest index at 7 MAP at seedling,
clonal, and preliminary evaluation stages at Umudike
between 2006 and 2008.