Genetic Adaptation of Erysiphc graminis f. sp. Hordei to Barley with Partial Resistance
Authors: Newton, A.C.
Journal: Journal of Phytopathology
Volume: 126
Issue: 2
Pages: 133-148
eISSN: 1439-0434
ISSN: 0931-1785
DOI: 10.1111/j.1439-0434.1989.tb01097.x
Abstract:Ten Isolates of powdery mildew were tested on three spring barley cultivars known to express partial resistance and on Golden Promise. Measurements of colony lengths were made under several different environments and compared with similar data produced from several cultivars containing one of two major resistance genes. Significant isolate, cultivar and environment interactions were recorded and one isolate in particular showed adaptation to a partially resistant cultivar. Measurements of infection frequency were also made under two temperature regimes. Again significant isolate, cuitivar and temperature interactions were recorded and the same isolate showed adaptation to the same partially resistant cultivar. This indicates that adaptation to a source of partial resistance can be found amongst unselected isolates and that pleiotropically adapted genotypes may rapidly overcome such resistance in the field following its widespread deployment. Other genes for resistance were detected in the major gene cultivars, including partial resistance in the ml‐v genotypes. Copyright © 1989, Wiley Blackwell. All rights reserved
Source: Scopus