The onset and effectiveness of Adult Plant Resistance (APR) in Tallon barley

Platz, Greg (2001). The onset and effectiveness of Adult Plant Resistance (APR) in Tallon barley. In: 2001: A Barley Odyssey - Program Handbook / Abstracts. 10th Australian Barley Technical Symposium, Rydges Lakeside, Canberra, (41). 16-20 September, 2001.

Author Platz, Greg
Title of paper The onset and effectiveness of Adult Plant Resistance (APR) in Tallon barley
Conference name 10th Australian Barley Technical Symposium
Conference location Rydges Lakeside, Canberra
Conference dates 16-20 September, 2001
Proceedings title 2001: A Barley Odyssey - Program Handbook / Abstracts
Publisher The Regional Institute Ltd
Publication Year 2001
Sub-type Fully published paper
Start page 41
Collection year 2001
Language eng
Abstract/Summary Field observations of net blotch epidemics indicated that Tallon barley was quite resistant to infection during later stages of growth despite being susceptible as a seedling. A glasshouse experiment was conducted to determine the effectiveness of this resistance and when it became operative. Three cultivars – Gilbert (very susceptible), Patty (resistant) and Tallon – were inoculated at various stages of growth with conidia of Pyrenophora teres f. teres and the infection response and leaf area diseased, recorded 13 days later. The response of Tallon clearly changed from susceptible to moderately susceptible at growth stage 33. Plants sown two weeks earlier were susceptible and plants sown two weeks later were moderately resistant. The response of the other two cultivars at similar growth stages paralleled their seedling responses. The resistance of Tallon appeared to increase with maturity so that, at its most resistant growth stage, the leaf area diseased was just 10% that of the susceptible, Gilbert. While this resistance appears pathotype specific, this experiment demonstrated very effective APR to net blotch. As most losses to this disease occur during the later stages of plant development, APR offers a valuable source of resistance.
Subjects EX
300203 Plant Improvement (Selection, Breeding and Genetic Engineering)
620102 Barley
Q-Index Code EX

Document type: Conference Paper
Collection: Centre for Nutrition and Food Sciences Publications
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Created: Fri, 24 Aug 2007, 00:28:17 EST