Table 3 Mean, range and coefficient of variation (CV) for
fresh root yield (t/ha) at 7 MAP in nine cassava populations
during seedling, clonal and preliminary evaluation trials
between 2006 and 2008 at Umudike, Nigeria
Population Mean Range CV (%) EB
parent
LB
parent
Seedling evaluation trial
COB-1 5.56 0.2–20.0 70.6 15.40 9.51
COB-2 5.16 0.5–22.5 81.2 15.40 9.96
COB-3 4.43 0.5–17.0 77.5 15.40 4.61
COB-4 4.63 0.5–25.0 98.6 17.36 9.51
COB-5 5.93 0.5–42.0 105.2 17.36 9.96
COB-6 4.41 0.5–35.0 118.0 17.36 4.61
COB-7 7.29 0.5–28.5 75.9 15.13 9.51
COB-8 7.77 0.5–24.0 75.3 15.13 9.96
COB-9 6.01 0.2–26.0 80.7 15.13 4.61
Clonal evaluation trial
COB-1 10.71 1.0–36.0 53.4 10.05 6.77
COB-2 9.75 2.4–22.3 42.6 10.05 6.62
COB-3 7.74 0.5–22.3 62.2 10.1 1.90
COB-4 10.26 0.7–30.0 63.6 8.29 6.77
COB-5 12.66 0.5–42.0 65.3 8.29 6.62
COB-6 9.88 0.17–24.0 67.8 8.29 1.90
COB-7 9.88 0.67–52.0 72.0 17.45 6.77
COB-8 6.29 1.0–22.0 71.7 17.45 6.62
COB-9 5.77 0.67–30.0 81.8 17.45 1.90
Preliminary evaluation trial
COB-1 7.64 1.0–22.7 56.36 17.27 13.38
COB-2 7.35 0.67–18.6 53.93 17.27 12.00
COB-3 6.24 0.25–15.7 61.89 17.27 15.75
COB-4 7.13 0.17–20.5 74.77 15.64 13.38
COB-5 8.40 0.33–51.0 88.30 15.64 12.00
COB-6 8.43 0.25–33.3 87.78 15.64 15.75
COB-7 11.09 0.5–43.3 66.52 23.29 13.38
COB-8 12.41 0.05–50.0 67.47 23.29 12.00
COB-9 10.99 0.5–11.5 62.76 23.29 15.75