Table 3. The parameter estimates of regression equations between physiological traits and days after start of treatment (DAST) under HT stress.

Line/cultivar	Leaf temperature (°C)				Fv/Fm
	β0 †	β 1 ‡	Pval	R2	β 0	β 1	Pval	R2
TA5594	25.6	0.05	0.547	0.02	0.76	–0.01	0.036	0.18
TA5595	25.2	0.23	<.001	0.53	0.85	–0.04	<0.001	0.69
TA5615	25.0	0.27	0.011	0.38	0.79	–0.05	0.004	0.47
TA5617	23.6	0.32	0.000	0.66	0.8	–0.02	0.002	0.51
TA5636	24.8	0.21	0.002	0.35	0.64	–0.03	0.039	0.18
TA5637	25.6	0.24	<0.001	0.76	0.68	–0.05	0.000	0.64
TA5638	24.7	0.20	<0.001	0.63	0.85	–0.06	<0.001	0.83
TA5639	24.5	0.34	<0.001	0.69	0.64	–0.05	00.000	0.62
TA5640	26.9	0.12	0.003	0.33	0.66	–0.04	<0.001	0.56
TA5599	24.6	0.21	0.003	0.34	0.91	–0.05	<0.001	0.74
TA5600	24.5	0.14	0.061	0.15	0.83	–0.05	<0.001	0.63
TA5601	24.3	0.24	0.010	0.39	0.86	–0.06	<0.001	0.83
TA5602	24.5	0.28	0.000	0.44	0.78	–0.05	<0.001	0.74
TA5088	25.2	0.20	0.013	0.25	0.88	–0.03	0.000	0.49
TA5608	25.8	0.15	0.007	0.29	0.89	–0.05	<0.001	0.69
TA5624–4	26.3	0.20	0.000	0.46	0.66	–0.05	<0.001	0.60
TA3008	26.9	0.12	0.092	0.19	0.77	–0.05	<0.001	0.72
TA4350–118	23.7	0.32	<0.001	0.75	0.9	–0.05	<0.001	0.63
TA4350–119	24.6	–0.03	0.485	0.02	0.74	0.00	0.014	0.25
TA4305–118	23.3	0.27	0.000	0.44	0.85	–0.04	0.001	0.43
	Leaf chlorophyll (SPAD unit)
TA5594	44.5	–0.78	0.001	0.41
TA5595	50.1	–1.90	<0.001	0.58
TA5615	51.1	–2.17	0.002	0.51
TA5617	53.0	–0.97	0.008	0.41
TA5636	54.1	–1.84	0.000	0.50
TA5637	48.5	–2.81	<0.001	0.73
TA5638	57.2	–3.04	<0.001	0.87
TA5639	53.0	–3.11	<0.001	0.81
TA5640	48.5	–2.49	<0.001	0.69
TA5599	58.6	–2.41	<0.001	0.66
TA5600	59.5	–2.46	<0.001	0.78
TA5601	55.0	–2.01	<0.001	0.77
TA5602	51.8	–2.51	<0.001	0.66
TA5088	54.6	–1.74	0.000	0.48
TA5608	56.1	–1.79	<0.001	0.69
TA5624–4	50.2	–2.35	<0.001	0.46
TA3008	49.9	–2.06	<0.001	0.81
TA4350–118	54.2	–2.01	<0.001	0.41
TA4350–119	63.7	–0.23	<0.000	0.69
TA4305–118	42.3	–1.89	0.001	0.84

^†β ₀, intercept;

^‡β ₁, slope.