Table 1. Host, year collected, location and number of Sclerotinia sclerotiorum isolates and the number of MCGs included in this study.

Sample number	Host/population abbreviation	Year collected	Location	Number of isolates	Number of MCGsa	MCG richness (G/N)b	Number of haplotypec	Haplotype richness (G/N)
1	Pea	2007	Walla Walla, WA	34	22	0.64	32	0.94
2	Gourd	2007	Prosser, WA	41	19	0.46	28	0.68
3	Potato (D)	2009	Hermiston, OR	32	16	0.5	23	0.72
4	Potato (E)	2009	Hermiston, OR	32	19	0.6	29	0.91
5	Lentil	2003	Colton, WA	40	18	0.45	28	0.70
6	Lentil	2005	Spangle, WA	33	17	0.57	26	0.87
7	Canola (USA)	2009	Fargo, ND	29	19	0.65	24	0.83
8	Canola (China)	2010	Anhui province, China	30	21	0.7	29	0.97

Abbreviations: G, number of MCGs; MCG, mycelial compatibility group; N, total number of isolates.

^aMCGs in each population.

^bRatio of the number of MCGs over population size.

^cUnique combination of microsatellite alleles of all loci.