. 2019 Apr 30;10:566. doi: 10.3389/fpls.2019.00566

TABLE 3.

Genetic correlations estimated from genetic variances and covariances (above the diagonal) and genetic correlations based on genome-wide marker effects (below the diagonal) for three JIP-test parameters and grain yield in the field experiments classified to two heat scenarios (mild heat and moderate heat) over 3 years in 221 testcrosses of the IBM IRILs.

Scenario	Trait^a	RC/ABS^a	ET/(TR-ET)	PI_ABS	Yield
Mild heat	RC/ABS		0.31	$0.67 + +$	0.09
	ET/(TR-ET)	${0.40}^{* *}$		$0.82 + +$	$- 0.32$
	PI_ABS	${0.60}^{* *}$	${0.65}^{* *}$		$- 0.17$
	Yield	$- 0.05$	0.02	$- 0.06$
Moderate heat	RC/ABS		$0.59 + +$	$0.92 + +$	0.51
	ET/(TR-ET)	${0.67}^{* *}$		$0.70 + +$	$0.73 + +$
	PI_ABS	${0.85}^{* *}$	${0.79}^{* *}$		$0.59 + +$
	Yield	${0.38}^{* *}$	${0.37}^{* *}$	${0.47}^{* *}$
Between scenarios		${0.22}^{* *}$	0.03	${0.49}^{* *}$	${0.39}^{* *}$

Genetic correlations based on genome-wide marker effects were estimated also between scenarios for a specific trait. ^aRC/ABS, reaction centers involved in $Q_{A}^{-}$ reduction per Photosystem II antenna chlorophyll; ET/(TR-ET), electron transport beyond $Q_{A}^{-}$ ; PI_ABS, performance index (potential) for energy conservation from photons absorbed by PSII to the reduction of intersystem electron acceptors. ++, The values are larger than two times the standard error. **Significance at P = 0.01.