Combating wheat stripe rust essential for region’s food security

AbstractCrop losses caused by plant pathogens are a primary threat to stable food production. Stripe rust (Puccinia striiformis) is a fungal pathogen of cereal crops that causes significant, persistent yield loss. Stripe rust exhibits host species specificity, with lineages that have adapted to infect wheat and barley. While wheat stripe rust and barley stripe rust are commonly restricted to their corresponding hosts, the genes underlying this host specificity remain unknown. Here, we show that three resistance genes, Rps6, Rps7, and Rps8, contribute to immunity in barley to wheat stripe rust. Rps7 cosegregates with barley powdery mildew resistance at the Mla locus. Using transgenic complementation of different Mla alleles, we confirm allele-specific recognition of wheat stripe rust by Mla. Our results show that major resistance genes contribute to the host species specificity of wheat stripe rust on barley and that a shared genetic architecture underlies resistance to the adapted pathogen barley powdery mildew and non-adapted pathogen wheat stripe rust.

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OCCURRENCE OF WHEAT STRIPE RUST, PUCCINIA GLUMARUM, IN NAGASAKI PREFECTURE DURING THE SPRING, 1960

Kyushu Plant Protection Research ◽

10.4241/kyubyochu.7.1 ◽

1961 ◽

Vol 7 ◽

pp. 1-2

Author(s):

Hisashi YOSHIOKA

Keyword(s):

Stripe Rust ◽

Wheat Stripe Rust ◽

Nagasaki Prefecture

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Biological control of wheat stripe rust by an endophytic Bacillus subtilis strain E1R-j in greenhouse and field trials

Crop Protection ◽

10.1016/j.cropro.2012.09.008 ◽

2013 ◽

Vol 43 ◽

pp. 201-206 ◽

Cited By ~ 19

Author(s):

Hui Li ◽

Jie Zhao ◽

Hao Feng ◽

Lili Huang ◽

Zhensheng Kang

Keyword(s):

Biological Control ◽

Bacillus Subtilis ◽

Stripe Rust ◽

Field Trials ◽

Subtilis Strain ◽

Wheat Stripe Rust

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Inheritance and Molecular Mapping of Barley Genes Conferring Resistance to Wheat Stripe Rust

Phytopathology ◽

10.1094/phyto-95-0884 ◽

2005 ◽

Vol 95 (8) ◽

pp. 884-889 ◽

Cited By ~ 22

Author(s):

Vihanga Pahalawatta ◽

Xianming Chen

Keyword(s):

Resistance Gene ◽

Microsatellite Marker ◽

Stripe Rust ◽

Molecular Mapping ◽

Puccinia Striiformis ◽

Infection Type ◽

Dominant Gene ◽

Wheat Stripe Rust ◽

Rust Pathogen ◽

Type Data

Most barley cultivars are resistant to stripe rust of wheat that is caused by Puccinia striiformis f. sp. tritici. The barley cv. Steptoe is susceptible to all identified races of P. striiformis f. sp. hordei (PSH), the barley stripe rust pathogen, but is resistant to most P. striiformis f. sp. tritici races. To determine inheritance of the Steptoe resistance to P. striiformis f. sp. tritici, a cross was made between Steptoe and Russell, a barley cultivar susceptible to some P. striiformis f. sp. tritici races and all tested P. striiformis f. sp. hordei races. Seedlings of parents and F1, BC1, F2, and F3 progeny from the barley cross were tested with P. striiformis f. sp. tritici races PST-41 and PST-45 under controlled greenhouse conditions. Genetic analyses of infection type data showed that Steptoe had one dominant gene and one recessive gene (provisionally designated as RpstS1 and rpstS2, respectively) for resistance to races PST-41 and PST-45. Genomic DNA was extracted from the parents and 150 F2 plants that were tested for rust reaction and grown for seed of F3 lines. The infection type data and polymorphic markers identified using the resistance gene analog polymorphism (RGAP) technique were analyzed with the Mapmaker computer program to map the resistance genes. The dominant resistance gene in Steptoe for resistance to P. striiformis f. sp. tritici races was mapped on barley chromosome 4H using a linked microsatellite marker, HVM68. A linkage group for the dominant gene was constructed with 12 RGAP markers and the microsatellite marker. The results show that resistance in barley to the wheat stripe rust pathogen is qualitatively inherited. These genes might provide useful resistance against wheat stripe rust when introgressed into wheat from barley.

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