Table 3.

Δatg1Δatg8 pathogenicity at 10 days after inoculation (dai).

Treatment*	Dikaryon	Replicates	Plants per replicate	Disease index†	t‐grouping‡
1	+/+	3	20	3.05 ± 0.03	A
2	+/−	3	20	2.6 ± 0.07	A
3	−/+	3	20	2.86 ± 0.19	A
4	−/−	3	20	0.95 ± 0.03	B

^* Treatment: paired strains are as follows (see Table 4 for strain genotypes): 1, = (1/2 × 2/9); 2, (1/2 × MN81.0); 3, (MN81.5 × 2/9); 4, (MN81.5 × MN81.0). Inoculation was at 10⁶ cells/mL for all strains.

^† Mean ± standard errors were calculated for each treatment on the basis of independent biological replicates.

^‡ Statistical analysis was performed using a nonparametric test of ordinal data in designed factorial experiments (Shah and Madden, 2004).