Temperature sensitivity of genes for resistance in wheat to<i>Puccinia recondita</i>

Dyck, P. L.; Johnson, R.

doi:10.1080/07060668309501601

Cited by 85 publications

(64 citation statements)

References 13 publications

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“…This view is consistent with the observed loss of Lr20 Sr15 resistance at high postinoculation temperatures, and its relative decrease following elevated preinoculation temperatures. However, instances where resistance is less effective at lower post-inoculation temperatures (Dyck & Johnson, 1983;Park et a/.. 1992), and the findings of the present study, that seedlings raised at 4°C before inoculation show reduced resistance, are not readily explained by protein thermolability alone.…”

Section: Discussionmentioning

confidence: 50%

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High and low pre‐inoculation temperatures decrease the effectiveness of the Lr 20 and Sr 15 rust resistance genes in wheat

Ramage

Sutherland

1995

Plant Pathology

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Spring wheat seedlings containing Lr20 and Srl5 resistance alleles were raised at 30°C, prior to inoculation with leaf rust (Puccinia recondita race 76-2.3) and stem rust (Puccinia graminis f.sp. tritici race 343-1.2.3.5,6) pathogens, respectively. Infected plants were then grown at one of seven temperatures in the range 18°-30° C and infection types were scored at 10 days post-inoculation. These results were compared with those obtained for plants raised at a pre-inoculation temperature of 18 °C. In both 18 C and 30° C pre-grown plants, a progressive increase in infection type was observed on resistant lines as post-inoculation temperature increased.However, resistant lines raised at 30°C had significantly higher infection types than plants raised at 18° C at all post-inoculation temperatures for which some degree of resistance was still evident in the plants raised at 18° C. The maximum temperature for expression of resistance was significantly higher for Lr20 than for Srl5, irrespective of pre-inoculation temperature. A lowering of the resistance expression was also evident in Sr/J-bearing lines raised at a very low pre-inoculation temperature (4°C). The effects of low pre-inoculation temperature on resistance were assessed in both winter and spring wheat lines. These results are discussed in the light of current ideas concerning the host membrane location of pathogen recognition events.

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Section: Discussionmentioning

confidence: 50%

“…Rather, investigations have concentrated on determining which genes exhibit temperature-dependent expression, and the range of post-inoculation temperatures within which they maintain their effectiveness (Bromfield. 1961;Martens el al.. 1967;Dyck & Johnson. 1983).…”

Section: Introductionmentioning

confidence: 99%

High and low pre‐inoculation temperatures decrease the effectiveness of the Lr 20 and Sr 15 rust resistance genes in wheat

Ramage

Sutherland

1995

Plant Pathology

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“…Although the cultivars likely carried the same gene(s), the ITs could vary under different conditions or genetic backgrounds (Li et al, 2008). The temperature sensitivities of the genes Lr3, Lr17 and Lr23 for resistance (i.e., IT) to Puccinia recondita in wheat were different at 10℃ /15℃ and 15℃/20℃ (Dyck and Johnson, 1983). Yr6, which seemed to be less effective at higher greenhouse temperature, and Wellings reported that Yr6 was less effective at lower in controlled environments (Wellings, …”

Section: Discussionmentioning

confidence: 99%

“…Loegering and Burton reported that race-specific resistance genes in wheat cultivars could be identified by comparing their reactions to different Pst pathotypes with those of cultivars with known resistance genes (Loegering and Burton, 1974). Based on these concepts and methods, the most race-specific resistance genes, including Yr, Lr, Sr and Pm genes, which are present in host cultivars, have been postulated in the last 40 years (Flor, 1956;Wang et al, 1963;Dyck and Johnson, 1983;Stubbs, 1985;Chen and Hu, 1993;Niu et al, 2000;Li and Zeng, 2002;Yang et al, 2003;Yuan et al, 2007;Liu et al, 2010;Xu et al, 2011). About five hundred wheat cultivars were tested, and some resistance genes have been postulated since the 1990s, but very little information is available on the sources and efficacy of resistance to wheat cultivars in the Longnan region of Gansu province in China.…”

Section: Introductionmentioning

confidence: 99%

Identification of Seedling Resistance Genes to Stripe Rust and Analysis of Adult Plant Resistance in 82 Wheat Cultivars from Gansu Province in China

Cao¹,

Jing²,

Huang³

et al. 2017

IJAB

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Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most destructive foliar diseases affecting wheat in China. The use of resistant cultivars is the most economical, environment friendly, and effective means to control stripe rust. By means of gene postulation and pedigree analysis, the resistant genes to stripe rust in eighty-two wheat cultivars from the Fifty-six cultivars were resistant in the adult plant stage. Twenty-seven cultivars had slow-rusting characteristics. The cultivars that were resistant at all stages and the adult plant stage should be utilized widely.

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“…Reported examples of resistance resulting from homozygous recessive alleles at a locus can often be explained by gene-dosage effects in which the heterozygous host genotype is classed phenotypically as susceptible, although pathogen growth is nevertheless more restricted than it would be in the homozygous susceptible genotype. Phenotypic variation and an apparent alteration in dominance relationships can also result from interactions between the environment, particularly temperature, and certain R genes (Dyck and Johnson, 1983;lslam et al, 1989;Judelson and Michelmore, 1992).…”

Section: Dominance and Nonallelic Interactionsmentioning

confidence: 99%