Table 5.

Effects of ‘local versus foreign’ pathogen origin on quantitative pathogenicity traits in Plasmopara viticola, for each resistant host inoculated (Bronner, Prior, Regent). Differences in least squares means (LSM) between local isolates and foreign isolates were determined with mixed linear models. The local isolates used were those collected from Bronner (n = 9), Prior (n = 10) and Regent (n = 7) and tested on the Bronner, Prior and Regent hosts, respectively. Foreign isolates included all other isolates collected from a resistant variety (n = 37 for Bronner, n = 46 for Regent and n = 44 for Prior). The isolate nested in the ‘local versus foreign’ effect was entered into the model as a random effect. Statistically significant results (P < 0.05) are shown in bold

Host inoculated	Trait	LSM	SE	DF	t‐Value	P‐value
Main pathogenicity traits
Bronner	Spore production	0.012	0.113	43	0.107	0.915
	Spore size	0.494	0.313	43	1.579	0.122
	Latency period	−0.007	0.019	44	−0.377	0.708
Prior	Spore production	0.027	0.083	52	0.328	0.744
	Spore size	−0.186	0.274	52	−0.680	0.500
	Latency period	−0.021	0.015	52	−1.397	0.168
Regent	Spore production	0.093	0.077	51	1.208	0.233
	Spore size	−0.079	0.319	51	−0.248	0.805
	Latency period	−0.004	0.007	51	−0.493	0.624
Sporulation dynamics
Bronner	T 50	0.231	0.128	41	1.800	0.079
	Sporulation rate	−0.124	0.132	41	−0.935	0.355
Prior	T 50	−0.014	0.067	52	−0.202	0.841
	Sporulation rate	−0.124	0.059	52	−2.108	0.040
Regent	T 50	−0.238	0.129	51	−1.843	0.071
	Sporulation rate	0.064	0.110	51	0.584	0.562