2016
DOI: 10.1371/journal.pone.0157029
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Major Gene for Field Stem Rust Resistance Co-Locates with Resistance Gene Sr12 in ‘Thatcher’ Wheat

Abstract: Stem rust, caused by Puccinia graminis (Pgt), is a damaging disease of wheat that can be controlled by utilizing effective stem rust resistance genes. ‘Thatcher’ wheat carries complex resistance to stem rust that is enhanced in the presence of the resistance gene Lr34. The purpose of this study was to examine APR in ‘Thatcher’ and look for genetic interactions with Lr34. A RIL population was tested for stem rust resistance in field nurseries in Canada, USA, and Kenya. BSA was used to find SNP markers associate… Show more

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Cited by 26 publications
(30 citation statements)
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“…PI 362698 was collected from Montenegro in 1971 and displayed high resistance to the Ug99 lineage Pgt race TTKST in adult-plant field trials and to race TTKSK in seedling tests at the USDA-ARS Cereal Disease Laboratory in St. Paul, MN, U.S.A. PI 362698 had a mesothetic infection type that ranged from ‘;1’ to ‘31;’ on seedlings and in adult-plant trials disease severity ranged from 0 to 10% with resistant (R) to moderately susceptible (MS) infection responses [ 29 – 31 ]. A mesothetic infection type is unusual but a similar mesothetic seedling infection type has been observed for ‘Thatcher’, which is postulated to have the resistance genes Sr5 , Sr9g , Sr12 , and Sr16 [ 32 34 ]. PI 362698 is postulated to have Sr57 based on DNA markers, however any additional resistance genes present within the line were unknown [ 29 ].…”
Section: Introductionmentioning
confidence: 85%
See 1 more Smart Citation
“…PI 362698 was collected from Montenegro in 1971 and displayed high resistance to the Ug99 lineage Pgt race TTKST in adult-plant field trials and to race TTKSK in seedling tests at the USDA-ARS Cereal Disease Laboratory in St. Paul, MN, U.S.A. PI 362698 had a mesothetic infection type that ranged from ‘;1’ to ‘31;’ on seedlings and in adult-plant trials disease severity ranged from 0 to 10% with resistant (R) to moderately susceptible (MS) infection responses [ 29 – 31 ]. A mesothetic infection type is unusual but a similar mesothetic seedling infection type has been observed for ‘Thatcher’, which is postulated to have the resistance genes Sr5 , Sr9g , Sr12 , and Sr16 [ 32 34 ]. PI 362698 is postulated to have Sr57 based on DNA markers, however any additional resistance genes present within the line were unknown [ 29 ].…”
Section: Introductionmentioning
confidence: 85%
“…The KASP markers NB-LRR3 [ 32 ] and wMAS000003 [ 44 ] were included for mapping due to their associations with Sr12 and Sr57 , respectively. Sr12 often displays a mesothetic response to many races at seedling stages [ 32 ]. wMAS000003 is designed to detect the functional polymorphism for the resistant allele of Sr57 [ 44 ].…”
Section: Methodsmentioning
confidence: 99%
“…The Pt pathotypes used in the LR trials were virulent to Lr27+Lr31; hence no effect on LR was detected through QTL analysis (Table 4). The Sr12 gene-carrying region on chromosome 3B was recently shown to confer APR to SR, including Ug99 race (Rouse et al, 2014;Hiebert et al, 2016). Although Sr12 is reported to map on 3BS in the centromeric region (McIntosh et al, 1980), Hiebert et al (2016) recently determined its location near the centromere on 3BL.…”
Section: Discussionmentioning
confidence: 99%
“…The Sr12 gene-carrying region on chromosome 3B was recently shown to confer APR to SR, including Ug99 race (Rouse et al, 2014;Hiebert et al, 2016). Although Sr12 is reported to map on 3BS in the centromeric region (McIntosh et al, 1980), Hiebert et al (2016) recently determined its location near the centromere on 3BL. The Pgt race RTR in Mexico is avirulent to the race-specific resistance gene Sr12 (Singh, 1991); however, races belonging to the Ug99 lineage are virulent (Jin et al, 2007).…”
Section: Discussionmentioning
confidence: 99%
“…The presence of APR genes or minor effect QTLs has been shown to enhance the strength of racespecific R genes (Hiebert et al, 2016) and promote their longevity (Brun et al, 2010).…”
Section: Discussionmentioning
confidence: 99%