an apparent trendP < 0.027
For F 1 -infected plants, differences in virus accumulation in leaves were less consistent, with an apparent trend suggesting intermediate levels of accumulation between those of P R and P S ; statistically significant differences ( P < 0.027; Kruskal-Wallis tests) were found among the three accessions at 16 dpi in basal leaves and at 23 and 30 dpi in intermediate leaves ( Figure 1B ).