Cited by 40Plant Pathogens and Fungal DiseasesGenetic and Environmental Crop StudiesPlant pathogens and resistance mechanisms

Diagnostics, genetic diversity and pathogenic variation of ascochyta blight of cool season food and feed legumes

Taylor, Paul W. J., Ford, Rebecca·2007·European Journal of Plant Pathology

Abstract

Molecular diagnostic techniques have been developed to differentiate the Ascochyta pathogens that infect cool season food and feed legumes, as well as to improve the sensitivity of detecting latent infection in plant tissues. A seed sampling technique was developed to detect a 1% level of infection by Ascochyta rabiei in commercial chickpea seed. The Ascochyta pathogens were shown to be genetically diverse in countries where the pathogen and host have coexisted for a long time. However, where the pathogen was recently introduced, such as A. rabiei to Australia, the level of diversity remained relatively low, even as the pathogen spread to all chickpea-growing areas. Pathogenic variability of A. rabiei and Ascochyta pinodes pathogens in chickpea and field pea respectively, appears to be quantitative, where measures of disease severity were based on aggressiveness (quantitative level of infection) rather than on true qualitative virulence. In contrast, qualitative differences in pathogenicity in lentil and faba bean genotypes indicated the existence of pathotypes of Ascochyta lentis and Ascochyta fabae. Therefore, reports of pathotype discrimination based on quantitative differences in pathogenicity in a set of specific genotypes is questionable for several of the ascochyta-legume pathosystems such as A. rabiei and A. pinodes. This is not surprising since host resistance to these pathogens has been reported to be mainly quantitative, making it difficult for the pathogen to over…

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Crossref · 10.1007/s10658-007-9177-x

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Authors
Taylor, P. W. J., & Ford, R.
Affiliations
The University of Melbourne (AU)
Corresponding author
Taylor, Paul W. J.
Venue
European Journal of Plant Pathology
Published
2007-06-30
Volume
119
Issue
1
Pages
127-133
ISSN
  • 0929-1873 (ISSN-L)
  • 1573-8469
OpenAlex
W2127972074
Cited by
40
References
43
Citations by year
2026: 1 · 2024: 1 · 2022: 1 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 3 · 2017: 1 · 2016: 3 · 2015: 3 · 2014: 5 · 2013: 1 · 2012: 1
FWCI
1.24
Type
journal article
Language
en
Open access
closed
Locations
European Journal of Plant Pathology (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Plant Pathogens and Fungal Diseases
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetic and Environmental Crop Studies
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant pathogens and resistance mechanisms
Keywords
ascochyta blight, Ascochyta rabiei, Ascochyta lentis, Ascochyta fabae, chickpea, field pea, lentil, Vicia faba, pathogenic variability, pathotypes, genetic diversity, molecular diagnosis, host resistance, partial resistance, pathogenicity assessment

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