Supp Table 1. Plant density, aggregation and virus incidence parameters of Arabidopsis thaliana populations.

Virus incidence
Population / Year / Month / Plant Densitya / VMb / Nc / CaMVd / CMVd / TCVd / TuMVd / TYMVd / Totald
Ciruelos de Coca / 2005 / April / - / - / 35 / 3 / 20 / 0 / 3 / 0 / 23
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 31 / 3 / 19 / 0 / 0 / 6 / 19
May / - / - / 24 / 13 / 42 / 4 / 0 / 0 / 50
2007 / April / - / - / 30 / 10 / 17 / 20 / 0 / 7 / 47
May / - / - / 0 / - / - / - / - / - / -
2008 / February / 10 ± 5 / 1.8 / 10 / 30 / 30 / 10 / 10 / 0 / 50
March / 20 ± 5 / 1.7 / 25 / 60 / 12 / 60 / 56 / 4 / 76
April / 26 ± 3 / 0.8 / 33 / 15 / 12 / 36 / 12 / 0 / 55
May / 20 ± 9 / 4.6* / 25 / 0 / 0 / 40 / 36 / 0 / 40
June / - / - / - / - / - / - / - / - / -
Carbonero el Mayor / 2005 / April / - / - / 12 / 0 / 17 / 0 / 17 / 0 / 33
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 22 / 5 / 73 / 0 / 0 / 9 / 73
May / - / - / 32 / 22 / 38 / 0 / 9 / 0 / 50
2007 / April / - / - / 16 / 19 / 0 / 13 / 6 / 0 / 31
May / - / - / 0 / - / - / - / - / - / -
2008 / February / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
March / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
April / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
May / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
June / - / - / - / - / - / - / - / - / -

a Number of plants/m2± std error

b Variance-to-mean ratio: VM = s2/x, where s2is the variance, and x the mean of the number of plants per each of the 5 quadrats monitored. Asteriscs indicate significant departure from random plant distribution (VM=1)

c Number of plants analysed

d Percentage of infected plants

- Not determined

Supp Table 1. Continued…

Virus incidence
Population / Year / Month / Plant Densitya / VMb / Nc / CaMVd / CMVd / TCVd / TuMVd / TYMVd / Totald
Las Rozas / 2005 / April / - / - / 21 / 0 / 14 / 0 / 5 / 0 / 19
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 0 / - / - / - / - / - / -
May / - / - / 18 / 17 / 22 / 11 / 11 / 0 / 50
2007 / April / - / - / 25 / 16 / 8 / 4 / 4 / 8 / 32
May / - / - / 28 / 7 / 21 / 0 / 0 / 7 / 25
2008 / February / 150 ± 80 / 53.7* / 30 / 7 / 7 / 7 / 7 / 7 / 23
March / 42 ± 21 / 13.1* / 29 / 31 / 7 / 28 / 45 / 38 / 72
April / 248 ± 140 / 98.3* / 42 / 2 / 2 / 26 / 38 / 7 / 50
May / 205 ± 76 / 34.9* / 24 / 15 / 35 / 15 / 6 / 3 / 38
June / - / - / - / - / - / - / - / - / -
Polán / 2005 / April / - / - / 23 / 0 / 13 / 0 / 4 / 0 / 17
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 45 / 22 / 0 / 0 / 0 / 4 / 27
May / - / - / 25 / 8 / 0 / 8 / 12 / 0 / 24
2007 / April / - / - / 24 / 17 / 0 / 0 / 17 / 0 / 29
May / - / - / 14 / 7 / 7 / 0 / 0 / 0 / 7
2008 / February / 1 ± 0.7 / 0.4 / 1 / 0 / 100 / 0 / 0 / 0 / 100
March / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
April / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
May / 10 ± 7 / 6.0* / 12 / 17 / 8 / 25 / 67 / 0 / 67
June / 2 ± 1.2 / 2.0 / 5 / 0 / 0 / 0 / 0 / 0 / 0

a Number of plants/m2 ± std error

b Variance-to-mean ratio: VM = s2/x, where s2is the variance, and x the mean of the number of plants per each of the 5 quadrats monitored. Asteriscs indicate significant departure from random plant distribution (VM=1)

c Number of plants analysed

d Percentage of infected plants

- Not determined

Supp Table 1. Continued…

Virus incidence
Population / Year / Month / Plant Densitya / VMb / Nc / CaMVd / CMVd / TCVd / TuMVd / TYMVd / Totald
Menasalbas / 2005 / April / - / - / 33 / 0 / 12 / 0 / 0 / 0 / 12
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 33 / 28 / 9 / 0 / 0 / 6 / 34
May / - / - / 24 / 4 / 4 / 0 / 4 / 0 / 13
2007 / April / - / - / 20 / 25 / 0 / 0 / 0 / 0 / 25
May / - / - / 16 / 0 / 0 / 0 / 0 / 6 / 6
2008 / February / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
March / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
April / 12 ± 5 / 2.8* / 16 / 20 / 20 / 33 / 53 / 0 / 50
May / 19 ± 5 / 1.6 / 24 / 4 / 38 / 8 / 8 / 0 / 50
June / 5 ± 3 / 2.7* / 5 / 0 / 0 / 0 / 0 / 0 / 0
Marjaliza / 2005 / April / - / - / 29 / 0 / 10 / 0 / 0 / 0 / 10
May / - / - / 0 / - / - / - / - / - / -
2006 / April / - / - / 30 / 10 / 0 / 0 / 0 / 0 / 10
May / - / - / 23 / 22 / 22 / 4 / 9 / 0 / 43
2007 / April / - / - / 22 / 9 / 5 / 0 / 0 / 0 / 14
May / - / - / 23 / 4 / 4 / 0 / 0 / 0 / 4
2008 / February / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
March / 0 ± 0 / 0 / 0 / - / - / - / - / - / -
April / 5 ± 2 / 1.0 / 6 / 17 / 33 / 0 / 17 / 0 / 33
May / 5 ± 3 / 2.3* / 6 / 17 / 33 / 0 / 33 / 0 / 50
June / 0 ± 0 / 0 / 0 / - / - / - / - / - / -

a Number of plants/m2 ± std error

b Variance-to-mean ratio: VM = s2/x, where s2is the variance, and x the mean of the number of plants per each of the 5 quadrats monitored. Asteriscs indicate significant departure from random plant distribution (P<0.05)

c Number of plants analysed

d Percentage of infected plants

- Not determined