Table 1. Ectocarpoid strains used for phaeovirus screening (adapted from Schroeder [16]).

Strain	Species	Family	Location	Genome	Number of sequence variants *			Concatenations**
				kb	DNApol	MCP	Helicase
Esil	Ectocarpus siliculosus	Ectocarpaceae	New Zealand	336	1 (1)	1 (1)	1 (1)	1
Efas	Ectocarpus fasciculatus	Ectocarpaceae	France	320	2 (2)	1 (1)	2 (2)	2
Plit	Pylaiella littoralis	Acinetosporaceae	Alaska	280	1 (1)	1 (1)	1 (1)	1
Hinc	Hincksia hincksiae	Acinetosporaceae	France	240	1 (1)	-	2 (1)	-
Mcla	Myriotrichia clavaeformis	Chordariaceae	Argentina	320	1 (1)	2 (2)	-	2
Firr	Feldmannia irregularis	Acinetosporaceae	Canary Islands	180	2 (2)	3 (2)	2 (2)	4
Flex	Feldmannia simplex.	Acinetosporaceae	Ireland	220	9 (8)	6 (4)	8 (3)	22

: variant in DNA sequence (HG003317 - HG003355) with amino acid variation indicated in parentheses. A negative PCR result is indicated by a minus symbol.

: possible permutations for DNApol and MCP as seen in Figure 4.