. 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	*Vpd*_L	*WUE*	*iWUE*	*Ci/Ca*
**SCA 6 x SCA 24**	0.08^ns	0.004^ns	49.1^**	-0.079^ns	-0.27^**	1.24^*	-0.96^ns	0.09^**
**SCA 6 x P4B**	-0.39^*	-0.010^*	-92.5^**	-0.006^ns	0.49^**	-1.03^ns	-10.2^ns	-0.19^**
**SCA 6 x PUCALA**	-0.14^ns	-0.009^*	36.8^**	-0.111^*	-0.32^**	1.03^ns	13.4^ns	0.05^*
**SCA 6 x IMC 67**	-0.25^ns	-0.008^*	-61.6^**	0.082^ns	0.41^**	-1.40^*	7.54^ns	-0.07^**
**SCA 6 x SJ 02**	0.70^**	0.023^**	68.2^**	0.114^*	-0.31^**	0.15^ns	-9.84^ns	0.12^**
**P4B x SCA 24**	0.19^ns	0.001^ns	12.0^*	0.002^ns	-0.04^*	-0.24^ns	13.0^ns	0.02^ns
**PUCALA x SCA 24**	0.11^ns	0.004^ns	-22.4^**	0.107^*	0.17^**	-0.31^ns	-0.99^ns	-0.01^ns
IMC67 x SCA 24	0.25^ns	0.004^ns	-9.54^ns	-0.041^ns	-0.06^**	0.26^ns	0.24^ns	-0.06^**
**SJ 02 x SCA 24**	-0.63^**	-0.013^**	-29.2^**	0.012^ns	0.20^**	-0.95^ns	-11.3^ns	-0.04^*
**P4B x PUCALA**	-0.36^*	0.0003^ns	8.12^ns	-0.051^ns	-0.07^**	-0.61^ns	-17.4^ns	0.01^ns
**IMC 67 x P4B**	0.28^ns	0.002^ns	58.6^**	-0.079^ns	-0.30^**	2.12^**	-7.96^ns	0.13^**
**P4B x SJ 02**	0.29^ns	0.007^ns	13.8^*	0.134^**	-0.08^**	-0.24^ns	22.5^*	0.03ns
IMC67 x PUCALA	0.24^ns	0.012^**	21.4^**	0.177^**	-0.01^ns	-1.07^ns	3.22^ns	0.04^*
**PUCALA x SJ 02**	0.16^ns	-0.007^ns	-43.9^**	-0.121^*	0.23^**	0.96^ns	1.74^ns	-0.08^**
**IMC 67 x SJ 02**	-0.52^**	-0.010^*	-8.91^ns	-0.139^**	-0.04^*	0.08^ns	-3.04^ns	-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**	-0.005^ns	207^**	549^**	420^*	0.001^ns	0.005^**	0.322^**	-0.077^**
**SCA 6 x P4B**	0.008^*	-186^**	-15.8^ns	162^ns	-0.004^ns	0.002^*	-0.201^**	0.141^**
**SCA 6 x PUCALA**	-0.004^ns	202^**	578^**	361^*	0.002^ns	-0.005^**	-0.384^**	-0.070^*
**SCA 6 x IMC 67**	0.005^ns	-79.2^*	-1682^**	-1401^**	0.007^ns	-0.001^ns	-0.126^*	-0.140^**
**SCA 6 x SJ 02**	-0.005^ns	-143^**	571^**	458^*	-0.006^ns	-0.002^*	0.389^**	0.146^**
**P4B x SCA 24**	0.004^ns	-145^**	163^ns	-38.9^ns	-0.004^ns	-0.007^**	0.127^*	0.071^*
**PUCALA x SCA 24**	0.002^ns	-297^**	-562^**	-659^**	-0.005^ns	-0.007^**	0.384^**	0.091^**
IMC67 x SCA 24	0.002^ns	111^**	851^**	1081^**	-0.001^ns	0.008^**	-0.209^**	0.071^*
**SJ 02 x SCA 24**	-0.003^ns	124^**	-1000^**	-803^**	0.009^ns	0.0002^ns	-0.624^**	-0.16^**
**P4B x PUCALA**	-0.008^*	-26.2^ns	-1231^**	-203^ns	0.006^ns	0.023^**	0.182^**	-0.012^ns
**IMC 67 x P4B**	-0.008^*	150^**	875^**	379^*	-0.001^ns	-0.009^**	-0.331^**	-0.032^ns
**P4B x SJ 02**	0.004^ns	207^**	209^ns	-299^ns	0.004^ns	-0.011^**	0.224^**	-0.167^**
IMC67 x PUCALA	0.003^ns	63.9^ns	476^**	-101^ns	-0.001^ns	-0.011^**	0.237^**	-0.042^ns
**PUCALA x SJ 02**	0.006^ns	57.9^ns	740^**	603^**	-0.003^ns	0^ns	-0.419^**	0.033^ns
**IMC 67 x SJ 02**	-0.002^ns	-246^**	-519^**	41.7^ns	-0.004^ns	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 (Vpd_L), 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) e o performance index or plant vitality (PI Inst).