A set comprising of 48 released Australian barley cultivars, and 861 (plus controls) breeding lines were screened at Toluca, Mexico for assessing barley stripe rust (BYR) resistance and susceptibility against Puccinia striiformis f. sp. hordei (Psh) race 24 (PshMEX-1). High quality phenotypic data was generated on these lines.
Key Information
Crop
Barley
Disease resistance(s)
Barley stripe rust
Additional Information
1) Barley yellow rust (BYR) screening was conducted at Toluca, Mexico, the field plots comprised 1 m paired rows sown on top of 0.8 m wide raised beds. The susceptible spreader variety Apizaco 36 was sown as hill plots in the middle of the 0.5 m wide alleys on one side of each test plot. Greenhouse increased fresh urediniospores of Mexican variant of Psh race 24 were suspended in Soltrol 170 oil and sprayed onto ~1-month old spreaders. Disease severity was recorded according to a modified Cobb Scale by recording disease score [0-100%] and host response [R = Resistant; MR = moderately resistant; MR-MS = moderately resistant to moderately susceptible; MS = moderately susceptible; S = susceptible] when the severity on the respective susceptible check varieties reached 90-100S.
2) The breeding lines were derived from the Australian cultivars La Trobe and Flagship, crossed with 17 donor lines carrying adult plant resistance (APR) to barley leaf rust.