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. 2017 Jun 19;12(6):e0178790. doi: 10.1371/journal.pone.0178790

Table 7. Effects of specific combining ability (SCA) on 15 cacao progenies for gas exchange and chlorophyll fluorescence parameters.

Progenies A gs Ci E VpdL WUE iWUE Ci/Ca
SCA 6 x SCA 24 0.08ns 0.004ns 49.1** -0.079ns -0.27** 1.24* -0.96ns 0.09**
SCA 6 x P4B -0.39* -0.010* -92.5** -0.006ns 0.49** -1.03ns -10.2ns -0.19**
SCA 6 x PUCALA -0.14ns -0.009* 36.8** -0.111* -0.32** 1.03ns 13.4ns 0.05*
SCA 6 x IMC 67 -0.25ns -0.008* -61.6** 0.082ns 0.41** -1.40* 7.54ns -0.07**
SCA 6 x SJ 02 0.70** 0.023** 68.2** 0.114* -0.31** 0.15ns -9.84ns 0.12**
P4B x SCA 24 0.19ns 0.001ns 12.0* 0.002ns -0.04* -0.24ns 13.0ns 0.02ns
PUCALA x SCA 24 0.11ns 0.004ns -22.4** 0.107* 0.17** -0.31ns -0.99ns -0.01ns
IMC67 x SCA 24 0.25ns 0.004ns -9.54ns -0.041ns -0.06** 0.26ns 0.24ns -0.06**
SJ 02 x SCA 24 -0.63** -0.013** -29.2** 0.012ns 0.20** -0.95ns -11.3ns -0.04*
P4B x PUCALA -0.36* 0.0003ns 8.12ns -0.051ns -0.07** -0.61ns -17.4ns 0.01ns
IMC 67 x P4B 0.28ns 0.002ns 58.6** -0.079ns -0.30** 2.12** -7.96ns 0.13**
P4B x SJ 02 0.29ns 0.007ns 13.8* 0.134** -0.08** -0.24ns 22.5* 0.03ns
IMC67 x PUCALA 0.24ns 0.012** 21.4** 0.177** -0.01ns -1.07ns 3.22ns 0.04*
PUCALA x SJ 02 0.16ns -0.007ns -43.9** -0.121* 0.23** 0.96ns 1.74ns -0.08**
IMC 67 x SJ 02 -0.52** -0.010* -8.91ns -0.139** -0.04* 0.08ns -3.04ns -0.04*
SD (gij) 0.150 0.004 5.52 0.044 0.02 0.62 9.98 0.02
SD (gi—gj) 0.237 0.006 8.72 0.070 0.03 0.98 15.8 0.03
Progenies A/Ci Fo Fm Fv Fo/Fm Fv/Fm PI inst Fv/Fo
SCA 6 x SCA 24 -0.005ns 207** 549** 420* 0.001ns 0.005** 0.322** -0.077**
SCA 6 x P4B 0.008* -186** -15.8ns 162ns -0.004ns 0.002* -0.201** 0.141**
SCA 6 x PUCALA -0.004ns 202** 578** 361* 0.002ns -0.005** -0.384** -0.070*
SCA 6 x IMC 67 0.005ns -79.2* -1682** -1401** 0.007ns -0.001ns -0.126* -0.140**
SCA 6 x SJ 02 -0.005ns -143** 571** 458* -0.006ns -0.002* 0.389** 0.146**
P4B x SCA 24 0.004ns -145** 163ns -38.9ns -0.004ns -0.007** 0.127* 0.071*
PUCALA x SCA 24 0.002ns -297** -562** -659** -0.005ns -0.007** 0.384** 0.091**
IMC67 x SCA 24 0.002ns 111** 851** 1081** -0.001ns 0.008** -0.209** 0.071*
SJ 02 x SCA 24 -0.003ns 124** -1000** -803** 0.009ns 0.0002ns -0.624** -0.16**
P4B x PUCALA -0.008* -26.2ns -1231** -203ns 0.006ns 0.023** 0.182** -0.012ns
IMC 67 x P4B -0.008* 150** 875** 379* -0.001ns -0.009** -0.331** -0.032ns
P4B x SJ 02 0.004ns 207** 209ns -299ns 0.004ns -0.011** 0.224** -0.167**
IMC67 x PUCALA 0.003ns 63.9ns 476** -101ns -0.001ns -0.011** 0.237** -0.042ns
PUCALA x SJ 02 0.006ns 57.9ns 740** 603** -0.003ns 0ns -0.419** 0.033ns
IMC 67 x SJ 02 -0.002ns -246** -519** 41.7ns -0.004ns 0.012** 0.429** 0.143**
SD (gij) 0.004 32.5 134.3 154 1.018 0.001 0.060 0.025
SD (gi—gj) 0.006 51.4 212.3 243 1.610 0.002 0.095 0.040

* and ** = Significance when SCA effects were twice and thrice greater than SD (gi), respectively. Net photosynthetic rate (A), stomatal conductance (gs), intercellular CO2 concentrations (Ci), transpiration rate (E), Vapor Pressure Deficit (VpdL), instantaneous water-use efficiency (WUE = A/E), intrinsic water use efficiency (iWUE = A/gs), ratio of intercellular and atmospheric CO2 molar fraction (Ci/Ca), carboxylation efficiency A/Ci, initial chlorophyll fluorescence (Fo), maximal chlorophyll fluorescence (Fm), variable chlorophyll fluorescence (FmFo = Fv), maximal photochemical efficiency of PSII (Fv/Fm), maximum quantum yield of PS2 photochemistry (Fv/Fo), quantum yield baseline (Fo/Fm) e o performance index or plant vitality (PI Inst).