Greg J. Platz

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Rph20 is the only reported, simply inherited gene conferring moderate to high levels of adult plant resistance (APR) to leaf rust (Puccinia hordei Otth) in barley (Hordeum vulgare L.). Key parental genotypes were examined to determine the origin of Rph20 in two-rowed barley. The Dutch cultivar 'Vada' (released in the 1950s) and parents, 'Hordeum laevigatum'(More)
No complete resistance to Pyrenophora tritici-repentis has been located in more than 1400 bread wheats examined. Incomplete resistance, however, occurs at different levels in many spring and winter types and data are presented for the strongest sources of resistance detected. In particular, there is a high frequency of Brazilian spring wheats with(More)
Bipolaris sorokiniana (teleomorph: Cochliobolus sativus) is the fungal pathogen responsible for spot blotch in barley (Hordeum vulgare L.) and occurs worldwide in warmer, humid growing conditions. Current Australian barley varieties are largely susceptible to this disease and attempts are being made to introduce sources of resistance from North America. In(More)
To respond faster to the changing climate, evolving pathogens and to feed a global population of 9–10 billion by 2050, plant breeders are exploring more efficient crop improvement strategies. In this study, we applied novel methodology for rapid trait introgression to the European two-rowed barley cultivar Scarlett. Scarlett is widely-grown in Argentina and(More)
was tested by inoculating 10 Josephine pears. Each pear was inoculated in 5 positions by wounding with the point of a tooth pick previously scraped across the surface of a sporulating culture. The wild and benomyl tolerant strains were inoculated in the same manner to separate batches of 5 pears. Inoculated fruit were sealed in plastic bags and kept at(More)
The poplar rust fungus Melampsora medusae Thum. previously reported from New South Wales (2) and Victoria (1) was first found at Beerwah in late December, 1972. The disease appears confined to the south-east having been recorded also on unidentified deciduous Populus spp. in Brisbane and Stanthorpe and on four semi-evergreen poplars growing in trial plots(More)
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