Table 2. Maximum germination and estimated parameters of soybean seed from the F1 generation as a function of osmotic potential.

Cultivars	MSG (%)	Equation constants			r2	MSGOPmin	Equation constants		r2	GRGOPmin
		a	b	c		(MPa)	a	b		(MPa)
Parent AG	95.40a	90.55	-57.00	-167.01	0.95	-0.93	0.69	0.66	0.91	-1.05
AG 100%	95.13a	89.06	-66.32	-181.18	0.98	-0.91	0.65	0.63	0.92	-1.03
AG 80%	92.01b	86.83	-59.38	-170.28	0.98	-0.91	0.62	0.58	0.90	-1.07
AG 60%	90.25b	85.82	-53.85	-163.83	0.98	-0.91	0.59	0.56	0.88	-1.05
AG 40%	78.04c	75.46	-36.48	-128.92	0.97	-0.92	0.59	0.54	0.87	-1.09
AG 20%	67.77c	67.35	-12.68	-95.18	0.98	-0.91	0.57	0.52	0.84	-1.10
Parent PR	95.00a	90.94	-51.78	-144.29	0.98	-0.99	0.69	0.59	0.99	-1.17
PR 100%	93.97a	88.75	-59.65	-170.53	0.98	-0.92	0.65	0.56	0.85	-1.16
PR 80%	91.88b	89.15	-40.85	-152.60	0.98	-0.91	0.61	0.53	0.92	-1.15
PR 60%	85.52c	83.34	-34.76	-137.84	0.99	-0.91	0.61	0.52	0.90	-1.17
PR 40%	82.08c	79.81	-35.60	-139.59	0.97	-0.89	0.61	0.62	0.95	-0.97
PR 20%	71.13d	70.89	-9.85	-99.54	0.98	-0.89	0.61	0.61	0.95	-1.00

F1 seed was collected from the soybean cultivar Asgrow AG5332 and Progeny P5333RY after exposure to drought stress, including replacement of 100, 80, 60, 40, and 20% of the evapotranspiration demand. Maximum seed germination (MSG), quadratic equation constants (a, b, c), coefficient of determination (r²) for MSG, estimated minimum osmotic potential when seed germination was zero (MSGOP_min), linear regression constants (a, b), coefficient of determination (r²) for seed germination rate, and estimated minimum osmotic potential when SGR was zero (SGROP_min). AG and PG represent Asgrow AG5332 and Progeny P5333RY correspondingly.