Co-Authors:
Ozkilinc, H., Department of Biology, The University of Gaziantep, Gaziantep 27310, Turkey, Department of Plant Pathology, Washington State University, Pulman, WA 99164, United States
Frenkel, O., The Levi Eshkol School of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel, Genomics Department, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
Shtienberg, D., Department of Plant Pathology and Weed Research, The Volcani Center, Agricultural Research Organization, Bet-Dagan 50250, Israel
Abbo, S., The Levi Eshkol School of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel
Sherman, A., Genomics Department, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
Kahraman, A., Faculty of Agriculture, Department of Field Crops, Harran University, Sanliurfa 63100, Turkey
Can, C., Department of Biology, The University of Gaziantep, Gaziantep 27310, Turkey
Abstract:
Ascochyta blight, caused by Didymella rabiei, affects both domesticated chickpea and its congeneric wild relatives. The aim of this study was to compare the aggressiveness of D. rabiei isolates from wild and domesticated Cicer spp. in Turkey and Israel on wild and domesticated hosts from both countries. A total of eight isolates of D. rabiei sampled from C. pinnatifidum, C. judaicum and C. arietinum in Turkey and Israel was tested on two domesticated chickpea cultivars and two wild Cicer accessions from Turkey and Israel. Using cross-inoculation experiments, we compared pathogen aggressiveness across the different pathogen and host origin combinations. Two measures of aggressiveness were used, incubation period and relative area under the disease progress curve. The eight tested isolates infected all of the host plants, but were more aggressive on their original hosts with one exception; Turkish domesticated isolates were less aggressive on their domesticated host in comparison to the aggressiveness of Israeli domesticated isolates on Turkish domesticated chickpea. C. judaicum plants were highly resistant against all of the isolates from different origins except for their own isolates. Regardless of the country of origin, the wild isolates were highly aggressive on domesticated chickpea while the domesticated isolates were less aggressive on the wild hosts compared with the wild isolates. These results suggest that the aggressiveness pattern of D. rabiei on different hosts could have been shaped by adaptation to the distinct ecological niches of wild vs. domesticated chickpea. © 2011 KNPV.
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