Table 2.

Intragenomic diversity of ITS2 genes in isoclonal cultures (only ITS2 copies represented by at least 100 reads were considered). Differences are calculated as uncorrected pairwise distances between aligned DNA sequences. The difference between the minimum and maximum genetic distance of ITS2 variants within cultures can be used to derive a similarity cut-off for an operational taxonomic unit (OTU)-based framework, upon which intragenomic diversity is contained within a given OTU

Symbiodinium culture	Symbiodinium culture type	Mean uncorrected genetic distance	Median uncorrected genetic distance	Minimum	Maximum	Difference (Max-Min)
CCMP2467 (1)	A1	0.006	0.008	0.004	0.008	0.004
CCMP2467 (2)	A1	0.006	0.008	0.004	0.008	0.004
KB8	A1	0.013	0.008	0.004	0.031	0.027
rt-147 (1)	B1	0.005	0.003	0.003	0.007	0.003
rt-147 (2)	B1	0.017	0.017	0.003	0.031	0.027
rt-064	B1	0.003	0.003	0.003	0.003	0.000
rt-152	C1	0.003	0.003	0.003	0.003	0.000