Table 2.
Mean squares of the wheat genotypes evaluated for stem rust (SR), yellow rust (YR), grain yield (GY) and yield related traits during MS2019 and OS2020 at KALRO, Njoro.
| Source of variation | df | Expected mean squares | YRAud | SRAud | TKW | GY | SS | DH |
|---|---|---|---|---|---|---|---|---|
| Season | 1 | δ2ε + 336 δ2b + 7056 δ2r + 21,168 δ2s | 561,944.44** | 1,825,888.69** | 27,575.79* | 275.79* | 126.93* | 1800.01* |
| Replicates/season | 4 | δ2ε + 336 δ2b + 7056 δ2r | 9833.77*** | 52,005.60*** | 28.53*** | 24.62* | 6.60** | 102.79*** |
| Blocks/replicates × season | 120 | δ2ε + 336 δ2b | 1230.63 | 7333.30* | 2.57 | 0.60* | 1.43 | 4.99 |
| Genotypes | 167 | δ2ε + 126 δ2sg + 256 δ2g | 45,963.70*** | 653,376.30*** | 82.67*** | 7.74*** | 3.56* | 126.40*** |
| Season × genotypes | 167 | δ2ε + 126 δ2sg | 3417.56*** | 34,905.20*** | 10.49*** | 1.88*** | 2.72*** | 17.70*** |
| Error | 548 | δ2ε | 1161.60 | 5600.20 | 2.17 | 0.48 | 1.30 | 4.79 |
| CV (%) | 30.96 | 22.98 | 6.48 | 17.69 | 6.32 | 2.94 | ||
| R2 | 0.94 | 0.98 | 0.94 | 0.90 | 0.68 | 0.92 |
| Source of variation | df | Expected mean squares | PH | SL | KS | BM | HI | |
|---|---|---|---|---|---|---|---|---|
| Season | 1 | δ2ε + 336 δ2b + 7056 δ2r + 21,168 δ2s | 1148.59* | 0.78 | 61.85 | 9274.36 | 0.02 | |
| Replicates/season | 4 | δ2ε + 336 δ2b + 7056 δ2r | 54.48* | 10.80*** | 632.84*** | 2405.04*** | 0.07*** | |
| Blocks/replicates × season | 120 | δ2ε + 336 δ2b | 17.37 | 0.31 | 56.06* | 28.98 | 0.00 | |
| Genotypes | 167 | δ2ε + 126 δ2sg + 256 δ2g | 56.32*** | 1.60*** | 85.81 | 234.96*** | 0.01*** | |
| Season × genotypes | 167 | δ2ε + 126 δ2sg | 31.97*** | 0.58*** | 73.81*** | 59.25*** | 0.00*** | |
| Error | 548 | δ2ε | 14.75 | 0.25 | 43.42 | 23.20 | 0.00 | |
| CV (%) | 4.33 | 5.29 | 14.45 | 16.36 | 20.21 | |||
| R2 | 0.72 | 0.78 | 0.61 | 0.86 | 0.83 |
YRAud yellow rust area under disease progress curve (AUDPC), SRAud stem rust AUDPC, TKW thousand kernel weight, GY grain yield, SS number of spikelets spike−1, DH days to 50% heading, PH plant height, SL spike length, KS number of kernels spike−1, BM biomass, HI harvest index, CV coefficient of variation, R2 coefficient of determination. The expected mean squares determined the random error as a test for the blocks and the genotype × season effects, the replicates as an error term to test the effects due to seasons, the genotype × season as an error term to test the effect due to genotypes and blocks as an error term to test the effect due to replicates; ***, ** and * = significance at p < 0.001, p < 0.01 and p < 0.05, respectively.