Table 6.
Mean of number of storage roots, yield of storage roots and vines, total biomass, harvest index and dry matter content of storage root of yam bean in each environment
| Traits | Environment | Means | |||||
|---|---|---|---|---|---|---|---|
| Rub.A | Rub.B | Kar.A | Kar.B | Mus.A | Mus.B | ||
| Number of roots | 1.1 | 1.3 | 1.5 | 1.3 | 0.4 | 0.5 | 1.0 |
| Storage root yield (T. ha−1) | 11.3 | 14.0 | 17.5 | 19.0 | 4.0 | 5.8 | 12.0 |
| Vine yield (T. ha−1) | 7.1 | 9.1 | 11.8 | 14.06 | 3.02 | 4.94 | 8.3 |
| Biomass, (T. ha−1) | 18.4 | 23.1 | 29.4 | 33.0 | 7.0 | 10.8 | 20.3 |
| Harvest index (%) | 65.5 | 61.1 | 59.1 | 57.1 | 57.0 | 54.2 | 59.0 |
| Dry matter content of storage roots | 16.5 | 18.2 | 19.1 | 18.1 | 15.5 | 16.7 | 17.4 |
Rub.A Rubona season A, Rub.B Rubona season B, Kar.A Karama season A, Kar.B Karama season B, Mus.A Musanze season A and Mus.B Musanze season B