Table 1.

Δatg8 pathogenicity at 10 days after inoculation (dai).

Treatment*	Dikaryon	Replicates	Plants per replicate	Disease index†	t‐grouping‡
1	+/+	3	20	2.8 ± 0.41	A
2	+/−	3	20	2.7 ± 0.45	A
3	−/+	3	20	2.8 ± 0.17	A
4	−/−	3	20	1.28 ± 0.12	B

^* Treatment: paired strains are as follows (see Table 4 for strain genotypes): 1, (1/2 × 2/9); 2, (1/2 × MN8.11); 3, (MN8.1 × 2/9); 4, (MN8.1 × MN8.11). 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).