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- W2964508898 abstract "Ascochyta blight caused by Ascochyta rabiei (Pass.) Lab. (Telomorph: Didymella rabiei) (Kov.) is one of the most important fungal diseases in chickpea worldwide. Knowledge about pathogen aggressiveness and identification resistance sources to different pathotypes is very useful for proper decisions in breeding programs. In this study, virulence of 32 A. rabiei isolates from different part of Iran were analyzed on seven chickpea differentials and grouped into six races based on 0-9 rating scale and susceptibility/resistant pattern of chickpea differentials. The least and most frequent races were race V and race I, respectively. Race V and VI showed highly virulence on most of differential, while race I showed least aggressiveness. Resistance pattern of 165 chickpea genotypes also were tested against six different A. rabiei races. ANOVA analysis showed high significant difference for isolate, chickpea genotypes and their interactions. Overall chickpea à isolate (race) interactions, 259 resistance responses (disease severity ⤠4) were identified. Resistance spectra of chickpea genotypes showed more resistance rate to race I (49.70%) and race III (35.15%), while there were no resistance genotypes to race VI. Cluster analysis based on disease severity rate, grouped chickpea genotypes into four distinct clusters. Interactions between isolates or races used in this study, showed the lack of a genotype with complete resistance. Our finding for virulence pattern of A. rabiei and newly identified resistance sources could be considerably important for integration of ascochyta blight resistance genes into chickpea breeding programs and proper decision in future for germplasm conservation and diseases management. Keywords: Ascochyta blight, chickpea, pathogenic variability, resistance sources" @default.
- W2964508898 created "2019-08-13" @default.
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- W2964508898 date "2019-08-01" @default.
- W2964508898 modified "2023-09-26" @default.
- W2964508898 title "Pathogenic Diversity of Ascochyta rabiei Isolates and Identification of Resistance Sources in Core Collection of Chickpea Germplasm" @default.
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- W2964508898 doi "https://doi.org/10.5423/ppj.oa.12.2018.0299" @default.
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