Identification of Resistance to Cephalosporium Stripe in Winter Wheat
- 1 January 1980
- journal article
- research article
- Published by Scientific Societies in Phytopathology®
- Vol. 70 (8) , 812-817
- https://doi.org/10.1094/phyto-70-812
Abstract
Seven winter wheat cultivars (Marias, Lancer, Winalta, CI 07638, Crest Line Row Component (LRC), PI 094424, and PI 278212) were examined for resistance to C. gramineum. Two types of resistance were observed: exclusion of the pathogen and restriction of spread of the pathogen following successful colonization of the host. The former was expressed as a reduction in the percentage of diseased plants. The latter was expressed as a reduction in the percentage of diseased tillers per infected plant and also as a reduction in the rate and severity of disease development. Both types of resistance were expressed independently. ''PI 278212'' exhibited a low infection percentage, but was rapidly and completely invaded after successful ingress. ''Crest LRC 40'' demonstrated a high percentage of diseased plants, but restricted infection between tillers, and had a moderate rate of systemic invasion. Each type of resistance may be identified and evaluated separately if seeding rates permit recognition of individual plants. Maximum resistance would be attained if both types of resistance were incorporated into a single genotype. Infection occurred only in soils undergoing frost-heaving, confirming that broken roots are essential for ingress of the fungus into the host. Differential responses between cultivars to pathogen exclusion could not be attributed to gross changes in either propagule levels in the soil or root mass. Cumulative effects of microhabitat interactions between the soil-root interface or differential responses to wound-healing are suggested as possible explanations for dissimilarities between cultivars.This publication has 3 references indexed in Scilit:
- Physiological Effects ofCephalosporium gramineumon Growth and Yield of Winter Wheat CultivarsPhytopathology®, 1980
- Relation Between Foliar Symptoms and Systemic Advance ofCephalosporium gramineumDuring Winter Wheat DevelopmentPhytopathology®, 1980
- Histological Aspects of Dwarf Bunt Resistance in WheatPhytopathology®, 1978