"Supporting Information Table S8. Allele frequency differentials (AFD), nucleotide diversity (?), and Tajima's D for NBS-LRR genes with significant alpha (positive selection). "															
Gene 	CDS length	Fraction CDS covered	Read depth	AFD ItaA-ItaT	AFD HunA-HunT	? ItaA	? ItaT	 ? HunA	 ? HunT	Tajima's D ItaA	Tajima's D ItaT	Tajima's D HunA	Tajima's D HunT		
Potri.001G066600	402	76.1	72.761	0.158	0.177	0.041	0.037	0.038	0.044	-1.054	-0.896	-0.174	-0.098		
Potri.003G084200	3904	69.7	51.116	0.312	0.309	0.004	0.005	0.004	0.004	-0.123	-0.928	-1.374	-1.189		
Potri.004G230000	868	89.6	64.262	0.288	0.316	0.025	0.017	0.027	0.020	0.914	0.586	1.685	0.853		
Potri.005G003900	595	99.2	48.854	0.161	0.145	0.035	0.017	0.028	0.020	0.809	-0.452	0.623	1.084		
Potri.005G004000	703	68.8	55.729	0.174	0.183	0.021	0.021	0.017	0.014	0.659	0.676	0.130	1.079		
Potri.005G004100	1230	32.6	18.885	0.216	0.209	0.022	0.014	0.029	0.005	0.616	0.960	0.340	-1.098		
Potri.005G004400	1326	44	71.772	0.140	0.157	0.029	0.022	0.031	0.018	0.034	0.019	-0.052	0.372		
Potri.005G062700	481	94.2	51.543	0.548	0.558	0.002	0.003	0.002	0.003	-0.657	0.497	0.931	0.341		
Potri.007G099700	3340	81.6	57.707	0.505	0.508	0.004	0.002	0.004	0.001	0.123	-0.578	0.175	-0.181		
Potri.007G142500	976	58.7	54.057	0.164	0.155	0.037	0.029	0.043	0.022	-0.192	-1.315	-0.630	-0.720		
Potri.007G143000	312	60.3	40.580	0.239	0.234	0.045	0.042	0.043	0.029	-0.654	-0.172	0.126	0.464		
Potri.007G143100	3044	32.1	73.822	0.132	0.142	0.055	0.032	0.055	0.032	-0.827	-1.158	-0.384	-0.246		
Potri.013G037300	3280	84.3	65.717	0.199	0.163	0.029	0.027	0.031	0.021	0.751	-0.667	0.046	-0.283		
Potri.019G001700	3187	16.8	30.337	0.344	0.392	0.023	0.018	0.029	0.010	-0.135	-0.676	0.091	-0.537		
Potri.019G002600	2857	99.1	69.874	0.252	0.251	0.009	0.012	0.008	0.011	-0.016	0.030	-0.482	0.844		
Potri.019G069500	4414	38	34.257	0.159	0.164	0.033	0.032	0.031	0.026	-0.405	-0.742	-0.471	0.192		
Potri.019G069600	3877	16.9	67.030	0.122	0.145	0.067	0.060	0.076	0.049	-0.728	-1.096	-0.679	-1.222		
Potri.019G069800	300	97	46.746	0.084	0.112	0.017	0.019	0.014	0.014	0.026	-0.010	-0.645	0.172		
Potri.019G070600	3390	10.1	44.151	0.172	0.192	0.078	0.109	0.060	-1.045	0.078	-0.111	0.034	0.861		
"NBS-LRR genes retained have significant alpha, >10% fraction coding sequence (CDS) covered and <75 read depth to guard against mapping / variant calling errors due to"															
"gene duplicates. Value in bold are >2SD for pi and >0 for Tajima Ita, Italian sampling locality; Hun, Hungarian sampling locality; A, P. alba; T, P. tremula."