Table 2. Generalized linear models of effects of germination timing of mother plants (M), treatment (T), storage time (S) and their interactions on presence of nondeep PD and of germination timing of mother plants (M), treatment (T), cold stratification time (C) and their interaction on presence of intermediate PD in Isatis violascens.

Factor	d.f	χ2	P-value
Presence of nondeep PD
M	1	7.671	<0.05
T	1	0.827	<0.05
S	1	14.228	0.36
M × T	1	0.360	<0.05
M × S	1	0.066	0.55
T × S	1	2.567	0.80
M × T × S	1	0.562	0.11
Presence of intermediate PD
M	1	157.02	<0.05
T	1	3.02	0.08
C	3	171.07	<0.05
M × T	1	0.06	0.80
M × C	3	3.38	0.34
T × C	3	0.20	0.98
M × T × C	3	0.37	0.95