Table 2. Housekeeping genes used for MLST of SDSE.

Gene	ORFa	Size of partial gene	No. of alleles	No. of nucleotide variant positions (%)	No. of variant aa positionsb	π	dn	ds	dn/ds
Glucose kinase (gki)	SDEG_1515	498	12	50 (10.1)	7	0.021	0.0035	0.0736	0.047
Glutamine transport protein (gtr)	SDEG_1494	450	10	15 (3.3)	7	0.010	0.0059	0.0248	0.240
Glutamate racemase (murI)	SDEG_0413	438	10	12 (2.7)	1	0.012	0.0068	0.0142	0.479
DNA mismatch repair protein (mutS)	SDEG_2091	405	10	27 (6.7)	7	0.016	0.0062	0.0480	0.129
Transketolase (recP)	SDEG_1735	459	20	37 (8.1)	3	0.034	0.0008	0.1472	0.006
Xanthine phosphoribosyl transferase (xpt)	SDEG_0895	450	22	38 (8.4)	10	0.021	0.0049	0.0736	0.0665
Acetoacetyl-coathioloase (atoB)	SDEG_1700	434	12	18 (4.1)	5	0.011	0.0035	0.0330	0.106

^aBased on ORF number in the GGS_124 genome (Genbank number AP010935).

^baa, amino acid.