Table 5.
Combined AMMI ANOVA for 7 traits of 60 cassava genotypes evaluated across six environments.
| Source | Mean squares | |||||||
|---|---|---|---|---|---|---|---|---|
| df | CGMS | LP | LR | SG | BIOMASS | RDMC | FRY | |
| Treatments | 359 | 2.49*** | 10.03*** | 2.43*** | 0.61** | 94.10*** | 78.80** | 448.00*** |
| Genotypes (G) | 59 | 3.69*** | 15.34*** | 2.65* | 0.80*** | 184.70*** | 80.70*** | 628.00*** |
| Environments (E) | 5 | 45.35*** | 93.44** | 35.99*** | 6.90*** | 807.20*** | 1,929.20*** | 10,679.00*** |
| Block | 12 | 5.93*** | 27.03*** | 2.73** | 0.43ns | 180.90*** | 104.00*** | 672.00*** |
| Interactions (GxE) | 295 | 1.52*** | 7.55* | 1.82*** | 0.47*** | 63.90*** | 47.10** | 239.00*** |
| IPCA1 | 63 | 3.99*** | 16.33*** | 5.35*** | 1.20*** | 138.50*** | 88.40*** | 418.00*** |
| IPCA2 | 61 | 1.42*** | 7.21** | 1.30*** | 0.36** | 69.90*** | 56.00*** | 320.00*** |
| Error | 708 | 0.92 | 6.59 | 1.00 | 0.34 | 33.30 | 37.50 | 145.00 |
| Sum of squares | ||||||||
| Source | df | CGM | LP | LR | SG | BIOMASS | RDMC | FRY |
| Treatments | 359 | 892.90 | 3,600.00 | 872.00 | 219.80 | 33,793.00 | 28,290.00 | 160,982.00 |
| Genotypes (G) | 59 | 217.80 | 905.00 | 156.50 | 47.10 | 10,895.00 | 4,760.00 | 37,080.00 |
| Environments (E) | 5 | 226.70 | 467.00 | 180.00 | 34.50 | 4036.00 | 9,646.00 | 53,394.00 |
| Block | 12 | 71.10 | 324.00 | 32.70 | 5.20 | 2170.00 | 1,248.00 | 8,058.00 |
| Interactions (GxE) | 295 | 448.40 | 2,227.00 | 535.50 | 138.20 | 18,862.00 | 13,884.00 | 7,0507.00 |
| IPCA1 | 63 | 251.30 | 1,029.00 | 337.30 | 75.50 | 8,726.00 | 5,571.00 | 26,339.00 |
| IPCA2 | 61 | 86.80 | 440.00 | 79.50 | 21.70 | 4,262.00 | 3,417.00 | 19,520.00 |
| Error | 708 | 649.60 | 4,663.00 | 705.30 | 240.80 | 23,547.00 | 26,553.00 | 102,609.00 |
| % treatment SS due to G | 24.39 | 25.14 | 17.95 | 21.43 | 32.24 | 16.83 | 23.03 | |
| % treatment SS due to E | 25.39 | 12.97 | 20.64 | 15.70 | 11.94 | 34.10 | 33.17 | |
| % treatment SS due to GxE | 50.22 | 61.86 | 61.41 | 62.88 | 55.82 | 49.08 | 43.80 | |
| % GxE SS due to IPCA1 | 56.04 | 46.21 | 62.99 | 54.63 | 46.26 | 40.13 | 37.36 | |
| % GxE due to IPCA2 | 19.36 | 19.76 | 14.85 | 15.70 | 22.60 | 24.61 | 27.69 | |
IPCA1, Interaction principal component axis 1; IPCA2, Interaction principal component axis 2; CGMS, Cassava green mite severity; LP, leaf pubescence; LR, leaf retention; SG, stay green; RDMC, root dry matter content; FRY, fresh root yield. ***significant at P < 0.001, **significant at P < 0.01, *significant at P < 0.05, ns, not significant.