Variability of the Stripe Rust Pathogen

Wheat tandem kinases provide insights on disease‐resistance gene flow and host–parasite co‐evolution

“…One of the promising broad‐spectrum Pst R‐genes is Yr15 that originated from WEW accession G25 (G25) (Gerechter‐Amitai et al ., ), that was shown to be effective against more than 3000 genetically and geographically diverse Pst isolates (Wan et al ., ). Following interspecific hybridization, Yr15 was transferred into spring wheat ( T. aestivum ) cultivars that are widely grown in the western United States, such as Clearwhite 515 ( Yr5 , Yr15 ), Expresso ( Yr15 ), Patwin 515 ( Yr15 , Yr17 ) and Seahawk ( Yr5 , Yr15 ) (Wan et al ., ), but not much information is known about its use in breeding programs in other countries. Taking into account that Yr15 was introgressed into a wide range of durum and common wheat pre‐breeding materials (Yaniv et al ., ; Wan et al ., ) that were spread around the globe, some wheat cultivars possibly carry this gene.…”

“…Following interspecific hybridization, Yr15 was transferred into spring wheat ( T. aestivum ) cultivars that are widely grown in the western United States, such as Clearwhite 515 ( Yr5 , Yr15 ), Expresso ( Yr15 ), Patwin 515 ( Yr15 , Yr17 ) and Seahawk ( Yr5 , Yr15 ) (Wan et al ., ), but not much information is known about its use in breeding programs in other countries. Taking into account that Yr15 was introgressed into a wide range of durum and common wheat pre‐breeding materials (Yaniv et al ., ; Wan et al ., ) that were spread around the globe, some wheat cultivars possibly carry this gene. Some types of markers that flank the Yr15 gene region (linked) (Ramirez‐Gonzalez et al ., ; Yaniv et al ., ) and dominant gene‐specific markers (Klymiuk et al ., ) were developed and validated to facilitate breeding programs to incorporate this gene into new cultivars.…”

Wheat diseases on the prairies: A Canadian story

“…In Europe, stripe rust was already established in the early 1900s, with several epidemics, race characterization, and the first set of differential lines established in Germany in the early 1930s (reviewed in Wan et al , ). This work was interrupted by World War II, but a severe stripe rust epidemic in the Netherlands in 1955 resulted in resumed virulence characterization from 1956 to 1988 by the Research Institute of Plant Protection in Wageningen.…”

“…Resistance genes Yr6 , Yr7 , Yr8 , Yr9 , Yr10 , Yr17 , Yr27 , and Yr32 have become important worldwide (Wan et al , ); virulence on Yr6 , Yr7 , Yr8 , Yr9 , and Yr17 is high throughout the world, but virulence on Yr10 , Yr24 , Yr27 , and Yr32 is either low or varied among regions (Ali et al , ). The breakdown of Yr17 and Yr27 resistance has had large economic consequences due to epidemics in many countries in the last 20 years, because both genes were widely deployed in many cultivars around the world (Wan et al , ). On the other hand, virulence towards Yr5 and Yr15 is absent throughout most countries, as these genes have not been widely used in breeding programmes, perhaps due to linkages to undesirable traits.…”

A haplotype-phased genome of wheat stripe rust pathogenPuccinia striiformisf. sp.tritici, race PST-130 from the Western USA

“…PST-130 is a highly virulent race that was first identified in the Western USA in 2007. PST-130 is equivalent to PSTv-69 in the new Pst nomenclature, which has virulence to Yr6, Yr7, Yr8, Yr9, Yr10, Yr17, Yr27, Yr32, Yr43, Yr44, and YrExp2; and avirulence to Yr1, Yr5, Yr15, Yr24, YrSP, YrTr1, and Yr76 (YrTye) [19,20]. To obtain high quality DNA of PST-130 for PacBio sequencing, we inoculated 21 day-old tetraploid wheat Kronos plants grown in a growth chamber (16 h light /8 h darkness, 16 °C constant temperature with 95-98 relative humidity).…”