Pooled analysis of variance of PVA-QPM lines and their hybrids and MSV-resistant testcrosses for grain yield, MSV disease scoring, carotenoids, and tryptophan contents assessed in two years of cropping seasons.
| Source of variation | Df | Grain yield (t ha‒1) |
MSV (no.) | Tryptophan (%) | PVA | ZEA | LUT | aC | bC | bCX |
|---|---|---|---|---|---|---|---|---|---|---|
| Year | 1 | 4.67 | 3.81 | 5.31 | 6.56 | 8.22 | 4.87 | 7.93 | 10.52 | 9.38 |
| Rep (year) | 6 | 7.24 | 5.78 | 12.78 | 10.63 | 14.72 | 11.43 | 13.65 | 11.57 | 12.11 |
| Crosses | 45 | 99.83 |
87.69 |
92.13 |
78.89 |
95.37 |
92.19 |
87.44 |
91.72 |
89.55 |
| Crosses × Year | 45 | 10.67 | 12.83 | 11.87 | 13.11 | 12.89 | 10.09 | 13.65 | 11.23 | 9.11 |
| GCA | 9 | 87.32 |
95.55 |
88.78 |
97.21 |
95.34 |
87.71 |
99.67 |
67.58 |
78.79 |
| SCA | 35 | 34.01 |
43.21 |
51.32 |
48.67 |
53.34 |
41.89 |
54.22 |
49.46 |
53.32 |
| Year × GCA | 6 | 13.37 | 15.11 | 8.70 | 11.13 | 9.73 | 12.25 | 13.11 | 10.79 | 12.22 |
| Year × SCA | 35 | 21.12 | 10.99 | 11.22 | 12.67 | 9.28 | 10.54 | 13.27 | 10.44 | 11.56 |
| Pool error | 329 | 12.52 | 9.88 | 7.04 | 10.22 | 8.01 | 11.56 | 8.07 | 7.04 | 10.76 |
| GCA/SCA (Baker ratio) % | 1.45 | 0.78 | 0.56 | 0.82 | 0.74 | 0.31 | 0.75 | 0.38 | 0.50 | |
| CV% | 9.8 | 11.2 | 7.55 | 10.82 | 11.78 | 9.54 | 10.59 | 12.66 | 11.83 |
** and * significant at 0.01 and probability levels, respectively.
MSV: maize streak virus, PVA: total provitamin A, bCX: b-cryptoxanthin, ZEA: zeaxanthin, LUT: lutein, bC: b-carotene, aC: a-caro.
