Pathotype IV, a New and Highly Virulent Pathotype of Didymella rabiei , Causing Ascochyta Blight in Chickpea in Syria (original) (raw)

Plant Disease, 2011

Abstract

The causal agent of Ascochyta blight disease of chickpea (Cicer arietinum L.) is highly variable because of the presence of a sexual phase (Didymella rabiei). There is also selection pressure on the pathogen due to wide adoption of improved resistant chickpea cultivars in some countries. The pathogen is able to produce pathotypes with specific virulence on particular cultivars. Three pathotypes, I, II, and III, have been reported (3). In this study, we confirmed the presence of a new and highly virulent pathotype that we designate as pathotype IV. To test the pathogenicity of the isolates collected and maintained at ICARDA, 10 isolates representing a wide spectrum of pathogenic variation, including those classified by S. M. Udupa et al. (3) and a putatively identified more virulent type, which was collected from a chickpea production field in the Kaljebrine area, Syria, were inoculated onto a set of differential chickpea genotypes. The differential genotypes, ILC 1929, ILC 482, ILC ...

Bassam Bayaa hasn't uploaded this paper.

Create a free Academia account to let Bassam know you want this paper to be uploaded.

Ask for this paper to be uploaded.