TABLE 3.

Geographic differentiation within and between strains

Test type and no.	Comparison	KSTa
Geographical variation within groups
i	N. California PRC vs S. California PRC	0.000
ii	N. California ALS vs S. California ALSb	−0.257
Plant host variation within MULT
iii	OAK vs PP	0.652
iv	ALSc vs OAK/PP	0.428*
Variation between the major groups
v	PD vs OLS	0.923***
vi	PD/OLS vs MULT	0.542***

^a*, 0.01 < P < 0.05; **, 0.001 < P < 0.01; ***, P < 0.001.

^bAll non-PRC ALS isolates.

^cALS isolates within MULT (see Fig. 1).