Table 2.
Mean square estimates by ANOVA for number of storage roots, yield of storage roots (SFRY) and vines (VNY), total biomass, harvest index (HI) and dry matter content of storage roots (DMC) form a series of experiments over three locations and two seasons with yam bean under Rwandan growing conditions
| Source | DF | Number of roots | SFRY (t/ha) | VNY (t/ha) | Biomass (t/ha) | HI (%) | DMC (%) |
|---|---|---|---|---|---|---|---|
| G | 21 | 115.8 | 5999.7** | 2370.3* | 15,745.6** | 5164.4 | 241.6* |
| L | 2 | 297.5** | 11,903.4** | 5270.2** | 32,867.8** | 4164.6* | 1033.2* |
| S | 1 | 73.7* | 393.5** | 408.1** | 1603.1** | 933.2* | 189.3 |
| SL | 2 | 14.27* | 22.7 | 0.68 | 22.3 | 111.1 | 234.7 |
| R:SL | 12 | 46.5* | 426.5* | 417.4** | 1552.4** | 2811.7 | 363.3 |
| GS | 21 | 15.8 | 490.1** | 220.9* | 1317.1** | 909.5 | 240.9 |
| GL | 42 | 75.0 | 3634.9** | 2583.2** | 11,674.1** | 17,830.2** | 141.0* |
| GSL | 42 | 8.0 | 367.5** | 240.6 | 1013.2 | 6463.7 | 89.6** |
| RGSL | 249 | 20.9 | 4177.6 | 3214.0 | 12,898.5 | 43,630.7 | 1146.0 |
The degree of freedom for residual is 249 and not 252 due to three missing data
DF degrees of freedom, G Genotypes, L Locations, S Seasons, SL Seasons by Locations, R:SL block of replications within Seasons and locations, GS genotype by season interaction, GL genotype by location interaction, G S L genotype by season by location interaction and RGSL Residual of Genotypes (G), seasons (S) and locations (L) effects
*Significant at the 0.05 level
**Significant at the 0.01 level