Ground Cover Supplement : GC Supplement - Foliar fungal diseases of pulses
15 Pulses resistance traits have been developed and provided to PBA to fast track the delivery of field pea varieties with improved downy mildew resistance. Field peas with improved resistance to two bacterial blight strains have been identified and new knowledge gained about the diversity and virulence of bacterial blight strains. A new seedling screening method for the disease has been readily adopted by PBA and will help speed the development of field pea varieties The Pulse Pathology and Genetics team at the Centre for Crop and Disease Management, Curtin University (from left): Dr Judith Lichtenzveig, Lina Farfan-Caceres, Wing Yee Liu, Rob Lee, Kate Montgomery, Johannes Debler, Rob Syme, Chala Turo, Christy Grime and Bernadette Henares. coordinated survey and characterisation of fungal collections for ascochyta blight in field peas, lentils and faba beans (pages 12 and 13). From here her team is able to assess resistance breakdown risks and predict future changes in pathogen populations. Developing novel selection tools is also a big part of the research program. Dr Lichtenzveig’s team is studying the genomes of species causing ascochyta blight to discover ‘fungal effectors’ – proteins secreted by the fungus that are the determinants of the disease outcome. Information about the genetic composition of the pathogen populations is leading to the discovery of novel sources of ascochyta resistance in field peas, lentils, faba beans and chickpeas. “This research will guide breeding and biosecurity strategies, aid in the discovery of resistance genes in the crop, and provide the means for cost and time-effective improvement of ascochyta blight resistance and management,” Dr Lichtenzveig says. “If all goes to plan, and we develop the breeding tools needed to produce resistant varieties, then we can really make a difference to the growers’ hip pocket.” The national effort involves Dr Jenny Davidson and Dr Rohan Kimber (South Australian Research and Development Institute), Associate Professor Rebecca Ford (Griffith University), Kurt Lindbeck (NSW Department of Primary Industries), Pragya Kant (Victorian Department of Economic Development, Jobs, Transport and Resources), Dr Janine Croser (University of Western Australia) and Dr Sarita Bennett and the Pulse Pathology and Genetics team at the CCDM, Curtin University. Growers are encouraged to keep up to date with the latest on Dr Lichtenzveig’s pulse research by signing up to the CCDM newsletter (www.ccdm.com.au). □ GRDC Research Code CUR00023 More information: Dr Judith Lichtenzveig, CCDM, Curtin University, email@example.com be tested for possible resistance genetics within two to three weeks of inoculation. Similarly, a screening method for chocolate spot in faba beans has been validated and seed from third-generation crosses has been generated for delivery to PBA. Research is being done to better understand how the downy mildew pathogen interacts with its field pea host and sources of resistance to the disease have been identified in PBA breeding material. Screening methods for the with resistance to bacterial blight. Two new sources of stronger resistance to Stemphylium blight in lentils have been identified and a screening method for the disease delivered to PBA. □ GRDC Research Code DAV00117 More information: Dr Tony Slater, Victorian Department of Economic Development, Jobs, Transport and Resources, 03 9032 7325, firstname.lastname@example.org PHOTO:GRDC The GRDC Pulse Germplasm Enhancement Program is pursuing resistance genetics for a range of pulse diseases including chocolate spot in faba beans, downy mildew and bacterial blight in field peas, Stemphylium blight in lentils, root lesion nematodes in chickpeas and botrytis grey mould in chickpeas, lentils and faba beans. The research is sourcing promising resistance genetics from pulse landraces and wild relatives (such as those pictured) and other breeding material. A new method developed to detect botrytis grey mould resistance in lentils and chickpeas has reduced the time required to screen for potential disease resistance from five months to just five weeks.
GC Supplement - Profitable pulses and pastures
GC Supplement - Soil constraints