Table 7.
Additive and multiplicative interaction effect analysis of variance of AMMI model for MRY, DW, BC and VC of 11 sweet potato genotypes.
| MRY | |||||
|---|---|---|---|---|---|
| Source of variations | df | MSS | F value | Proportional variance | Cumulative variance |
| Environment | 2 | 997.84 | 575.82*** | – | – |
| Error I | 6 | 1.73 | 0.72ns | – | – |
| Genotype | 10 | 250.08 | 103.66*** | – | – |
| GEI | 20 | 48.30 | 20.02*** | – | – |
| PC1 | 11 | 68.58 | 28.43*** | 78.10 | 78.10 |
| PC2 | 9 | 23.53 | 9.75*** | 21.90 | 100 |
| Error II | 60 | 2.41 | – | – | – |
| Total | 118 | 55.79 | – | – | – |
| DW | |||||
| Environment | 2 | 12.27066 | 5.438277* | – | – |
| Error I | 6 | 2.25635 | 0.832957ns | – | – |
| Genotype | 10 | 215.7566 | 79.64898*** | – | – |
| GEI | 20 | 7.727743 | 2.852783*** | – | – |
| PC1 | 11 | 12.96968 | 4.79*** | 92.3 | 92.3 |
| PC2 | 9 | 1.32093 | 0.49ns | 7.7 | 100 |
| Error II | 60 | 2.708844 | – | – | – |
| Total | 118 | 22.60412 | – | – | – |
| BC | |||||
| Environment | 2 | 3.698079 | 0.464182ns | – | – |
| Error I | 6 | 7.966866 | 1.811431ns | – | – |
| Genotype | 10 | 982.9968 | 223.5046*** | – | – |
| GEI | 20 | 26.88329 | 6.112471*** | – | – |
| PC1 | 11 | 48.38155 | 11*** | 99 | 99 |
| PC2 | 9 | 0.60764 | 0.14ns | 1 | 100 |
| Error II | 60 | 4.398105 | – | – | – |
| Total | 118 | 95.12189 | – | – | – |
| VC | |||||
| Environment | 2 | 9.334455 | 6.633173* | – | – |
| Error I | 6 | 1.407238 | 0.411242ns | – | – |
| Genotype | 10 | 222.2501 | 64.94883*** | – | – |
| GEI | 20 | 12.99844 | 3.798574*** | – | – |
| PC1 | 11 | 23.45776 | 6.86*** | 99.3 | 99.3 |
| PC2 | 9 | 0.21482 | 0.06ns | 0.7 | 100 |
| Error II | 60 | 3.421926 | – | – | – |
| Total | 118 | 25.21073 | – | – | – |
***significant at p < 0.001, ** significant at p < 0.01, * significant at p < 0.05, NS non-significant, MRY marketable storage root yield (t/ha), DW dry weight of storage roots (%), BC beta-carotene content (mg/100g) and VC vitamin C content (mg/100g).