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

Table 6. ANOVA of combining ability for gas exchange and chlorophyll fluorescence parameters.

SV Mean Square
DF A Gs Ci E VpdL WUE iWUE Ci/Ca
Progeny 14 0.868** 0.0010** 32303** 0.131** 1.117** 8.71** 3703** 0.098**
GCA 5 0.942** 0.0019** 67623** 0.252** 2.407** 13.4** 9064** 0.196**
SCA 9 0.827** 0.0005** 12680** 0.064** 0.401** 6.11* 725ns 0.043**
Residue 42 0.15 0.0001 203 0.013 0.002 2.54 664 0.002
SSgca (%) - 38.8 67.5 74.8 68.7 76.9 54.9 87.4 71.6
SSsca (%) - 61.2 32.5 25.2 31.3 23.1 45.1 12.6 28.4
h2 - 93.1 98.7 99.7 95.5 99.9 86.7 91.4 99.1
SV Mean Square
DF A/ci Fo Fm Fv Fo/Fm Fv/Fm PI inst Fv/Fo
Progeny 14 0.0003** 260678** 9777954** 4746184** 0.0001ns 0.00043** 0.663** 0.068**
GCA 5 0.0008** 397202** 19998692** 8965447** 0.0002ns 0.00036** 0.527** 0.059**
SCA 9 0.0001ns 184831** 4099767** 2402149** 0.0001ns 0.00047** 0.739** 0.074**
Residue 42 0.0001 7037 120157 157592 6.90635 0.00001 0.024 0.004
SSgsa (%) - 87.1 54.4 73 67.5 50 29.7 28.4 30.9
SSsca (%) - 12.9 45.6 27 32.5 50 70.3 71.6 69.1
h2 - 99.0 74.4 73.6 73.0 70.0 65.9 91.5 66.2

One (*) and two (**) asterisks indicate significance by the F test at 5 and 1% probability, respectively.

Source of variation (SV), degree of freedom (DF), 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 (Fm−Fo) (Fv), maximal photochemical efficiency of PSII (Fv/Fm), maximum quantum yield of PS2 photochemistry (Fv/Fo), quantum yield baseline (Fo/Fm), performance index or plant vitality (PI Inst), general combining ability (GCA), specific combining ability (SCA), sum of squares of the general combining ability (SSgca), sum of squares of the specific combining ability (SSsca) and mean heritability (h2).