Table 5.

Infection types (ITs) observed on nine tetraploid genetic stocks with races THTSC and TCMJC of Puccinia graminis f. sp. tritici at Fargo, ND and St Paul, MN, USA

Line	Sr13 haplotype	THTSC^a		TCMJC^a		TCMJC^b		TCMJC^c
Line	Sr13 haplotype	25℃	GH	25℃	GH	25℃	22℃	25℃	22℃
Rusty		4	4	43	43	3⁺	3⁺	3⁺	3⁺
Wells	R1	14X	12	34	34/23	32⁺	3	33⁺	33⁺
Lakota	R1	123X	12⁻	34	34	2⁺	3	3⁺	3⁺
Rusty‐KL‐B	R1	33⁻	33⁻	34	34	3⁺	3⁺	3⁺	3⁺
Rusty‐KL‐C	R1	33⁻	33⁻	34	34	3⁺3	3⁺	3⁺	3⁺
Rusty‐14803	R2	2	23⁻	2⁺	2⁺3⁻	2⁺	2⁺	2⁺	2⁺
PI 387696	R2	2	2	2	2⁺	2	2	2⁺	2⁺
Rusty‐ST464‐C1	R3	22⁻	2	2⁺	3⁻2	2⁺	2⁺	2⁺	2⁺
Langdon	R3 +	1⁻	1⁼	2⁺	2	22⁺	22⁺	22⁺	22⁺

22℃ and 25℃ are growth chamber trials conducted with daylight temperatures as indicated. GH is a greenhouse trial set at 21℃ but where temperatures are not stringently maintained. ITs: 0, fleck (;), 1, and 2 are resistant reactions, while 3 and 4 are susceptible reactions. Plants may have combinations of ITs, for example IT 32 is primarily IT 3 with smaller amount of IT 2. Plus (⁺), minus (⁻), and double minus (⁼) signs indicate larger, smaller and much smaller pustules than normally seen for that IT (Stakman et al., ¹⁹⁶²). C = more chlorosis than normal, n = necrosis. A slash indicates heterogeneous infection types on different plants of a population while X indicates a highly heterogeneous infection type on a single leaf.

^{^a}

Fargo, ND.

^{^b}

Trial 1 at St Paul, MN.

^{^c}

Trial 2 at St Paul.