Research Article
Analysis of Combining Ability for Early Maturity and Yield in Rice (Genus: Oryza) at the Kenyan Coast
Table 5
Ratios of GCA variance to SCA variance for grain yield and agronomic traits at Bahari and KALRO Mtwapa during 2018 long rain season.
| Characters | σ2 gca | σ2 sca | 2σ2 GCA/(2σ2 GCA + σ2 SCA) | Gene action |
| Yield | 0.518 | 1.964 | 0.2637 | Nonadditive | Days to 50% flowering | 67.946 | 74.144 | 0.9164 | Nonadditive | Plant height | 76.91 | 110.873 | 0.6936 | Nonadditive | Number of tillers | 1.411 | 4.23 | 0.8335 | Nonadditive | Unproductive tillers | 0.024 | 0.172 | 0.0132 | Nonadditive | Panicle length | 0.785 | 1.818 | 0.431 | Nonadditive | Panicle weight | 0.141 | 1.343 | 0.104 | Nonadditive | Fertile spikelets | 532.872 | 734.75 | 0.7252 | Nonadditive | Unfertile spikelets | 128.089 | 223.07 | 0.574 | Nonadditive | Grain length | 0.172 | 0.236 | 0.7288 | Nonadditive | Grain width | 0.027 | 0.031 | 0.87 | Nonadditive | 1000 grain weight | 11.538 | 12.285 | 0.939 | Nonadditive | Biomass | 4620.952 | 8.949 | 916.258 | Additive |
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