Table 6. Estimates of the combining capacity effects (GCA) for seven contrasting cacao genotypes for drought submitted for 60 days to two water conditions (SI): control (ΨWL between -0, 1 and -0.5 MPa) and drought (ΨWL between -2.0 to -2.5 MPa).
Ilhéus, Bahia, Brazil.
| Parents | General Combining Ability (gi) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H | CD | TLA | LN | ILA | LDB | SDB | TDB | LAR | SLA | LMR | RDB | R/S | RL | RA | RD | RV | RD < 1 | 1< RD < 2 | RD > 2 | |
| Control | ||||||||||||||||||||
| SCA 06 | 0.1 | 1.8 | 1192.0 | 4.9 | 6.7 | 10.1 | 7.6 | 20.3 | -0.9 | -3.4 | -0.1 | 1.7 | -0.2 | 200.1 | 178.5 | 0.1 | 68.6 | -4.5 | 39.8 | 172.1 |
| CATONGO | -0.0 | 0.0 | 458.4 | -5.9 | 15.5 | 2.4 | -0.5 | 8.3 | -4.6 | -0.0 | 0.2 | -0.1 | 0.0 | 76.8 | 34.5 | -0.0 | -26.1 | -2.8 | -40.8 | -55.8 |
| PUCALA | -0.2 | -1.3 | -1142.7 | -9.0 | 5.3 | -10.2 | -15.3 | -23.8 | 1.2 | -4.8 | 0.2 | -1.9 | 0.2 | -994.2 | -345.1 | -0.2 | -99.9 | -164.9 | -140.0 | -272.7 |
| TSH 1188 | 0.0 | -0.9 | 1218.9 | 11.3 | -19.5 | -5.4 | 1.0 | -15.8 | 3.7 | 14.9 | -0.1 | -1.2 | 0.0 | 103.6 | -118.1 | -0.3 | -5.4 | 3.3 | 29.3 | 17.7 |
| RB 40 | 0.0 | 0.3 | -1731.7 | -2.9 | -9.2 | -1.1 | -3.0 | -8.6 | -1.7 | -11.6 | 0.1 | 0.1 | 0.0 | 141.9 | -50.6 | -0.1 | -17.1 | 87.7 | 119.0 | -105.5 |
| MOC 01 | 0.0 | 0.7 | 1042.4 | 3.3 | -4.6 | 5.0 | 11.0 | 19.8 | 2.7 | 0.2 | 0.0 | 3.3 | 0.1 | 359.2 | 54.4 | -0.0 | 6.2 | 38.3 | 73.1 | 78.0 |
| IMC 67 | 0.0 | -0.5 | -1037.4 | -1.7 | 5.7 | -0.9 | -0.7 | -0.3 | -0.3 | 4.7 | 0.0 | -1.9 | -0.1 | 112.3 | 246.3 | 0.3 | 73.8 | 43.0 | -80.5 | 166.1 |
| Drought | ||||||||||||||||||||
| SCA 06 | 0.2 | 0.9 | 348.9 | 4.5 | -10.5 | 1.3 | 5.6 | 16.8 | -0.9 | -8.3 | -0.1 | -1.3 | -0.3 | 115.3 | 91.9 | -0.0 | 16.2 | 71.2 | 23.6 | 71.3 |
| CATONGO | -0.0 | 0.1 | 168.3 | -4.8 | 16.8 | -0.4 | 1.7 | 4.5 | 2.6 | 4.6 | -0.1 | 4.3 | 0.2 | -266.8 | -49.2 | 0.2 | 10.9 | -218.1 | -124.6 | -4.3 |
| PUCALA | -0.2 | -1.0 | -1959.4 | -14.0 | 12.2 | -10.3 | -17.9 | -25.4 | -4.8 | -21.1 | 0.2 | -3.9 | 0.2 | -124.4 | -83.5 | 0.0 | -5.9 | -36.9 | -37.0 | -35.8 |
| TSH 1188 | -0.0 | -1.3 | 52.7 | 9.3 | -38.5 | -4.9 | -4.1 | -11.1 | 3.8 | 11.3 | -0.1 | -4.1 | -0.1 | 110.0 | -20.1 | -0.0 | -8.8 | -20.2 | 26.3 | -3.9 |
| RB 40 | 0.1 | 1.3 | 622.8 | -0.2 | 25.3 | 5.8 | 12.2 | 10.1 | -3.6 | 2.1 | -0.1 | 1.5 | -0.1 | 139.9 | 0.9 | -0.1 | -3.0 | 34.1 | 35.3 | -12.3 |
| MOC 01 | -0.0 | -0.4 | 849.7 | 5.5 | -1.8 | 6.2 | 1.4 | 1.2 | 3.5 | 12.9 | 0.1 | 3.1 | 0.1 | 225.8 | -40.3 | -0.1 | -22.1 | 127.4 | 16.0 | -36.7 |
| IMC 67 | 0.0 | -0.1 | -83.1 | -0.3 | -3.5 | 2.3 | 0.8 | 3.7 | -0.5 | -1.6 | 0.1 | 0.3 | -0.1 | -199.8 | 101.2 | 0.0 | 12.7 | 42.4 | 60.2 | 21.9 |
H, high; CD stem diameter; TLA, total leaf area; LN, leaf number; ILA, individual leaf area; LDB, leaf dry biomass; SDB, stem dry biomass; TDB, total dry biomass; LAR, leaf area ratio; SLA, specific leaf area and MRL, leaf mass ratio; RDB, root dry weight; R/S, root/shoot ratio; RL, root length; RA, root area; RD, average root diameter; RV, root volume; RD, fine root diameter (RD < 1 mm), medium (1 < RD < 2 mm) and coarse (< 2 mm).