TABLE 3.
Comparative contributions of general (GCA) and specific combining ability (SCA) effects to grain yield and some secondary traits
| Low‐N condition | Striga‐infested condition | High‐N condition | Across management conditions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trait | GCA‐m | GCA‐f | SCA | GCA‐m | GCA‐f | SCA | GCA‐m | GCA‐f | SCA | GCA‐m | GCA‐f | SCA |
| % | ||||||||||||
| Grain yield | 32.7 | 30.6 | 36.7 | 32.9 | 32.1 | 35.0 | 38.0 | 32.2 | 29.7 | 34.8 | 38.8 | 26.4 |
| Days to 50% anthesis | 37.8 | 38.3 | 23.9 | 39.7 | 41.3 | 19.0 | 50.5 | 39.1 | 10.4 | 47.5 | 41.4 | 11.0 |
| Days to 50% silking | 36.2 | 36.7 | 27.1 | 31 | 37.8 | 31.2 | 47.9 | 40.8 | 11.3 | 43 | 42.4 | 14.6 |
| Anthesis–silking interval | 31.2 | 31.7 | 37.1 | 31 | 32.1 | 36.9 | 30 | 38.5 | 31.4 | 33.7 | 41.2 | 25.1 |
| Ear aspect | 23.4 | 47.7 | 28.9 | 19.1 | 26.5 | 54.3 | 13.3 | 23.2 | 63.5 | 25.9 | 42.2 | 32.0 |
| Ears per plant | 38.5 | 19.8 | 41.7 | 28.7 | 24 | 47.4 | 28.2 | 24.2 | 47.5 | 43.2 | 24.4 | 32.4 |
| Plant aspect | 23.1 | 39.8 | 37.1 | – | – | – | 26.8 | 47.1 | 26.1 | – | – | – |
| Stay‐green characteristics | 24.3 | 38.5 | 37.1 | – | – | – | – | – | – | – | – | – |
| Chlorophyll content | 22.1 | 24.8 | 53.1 | – | – | – | – | – | – | – | – | – |
| Striga damage rating at 8 WAP a | – | – | – | 31.2 | 34.8 | 34 | – | – | – | – | – | – |
| Striga damage rating at 10 WAP | – | – | – | 31.5 | 41.3 | 27.2 | – | – | – | – | – | – |
| Striga emergence count at 8 WAP | – | – | – | 23.2 | 35.8 | 41.1 | – | – | – | – | – | – |
| Striga emergence count at 10 WAP | – | – | – | 18.8 | 36.2 | 44.9 | – | – | – | – | – | – |
Note. GCA‐m and GCA‐f is the general combining ability of the male parent and female parent, respectively, and SCA is the specific combining ability.
a
WAP, weeks after planting.