Characterization ofRhizoctonia solani isolates from potatoes in turkey and screening potato cultivars for resistance to AG-3 isolates |
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Authors: | Yusuf Yanar Gungor Y?lmaz Ibrahim Cesmeli Sinasi Coskun |
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Institution: | (1) Dept. of Plant Protection, Faculty of Agriculture, Gaziosmanpasa University, 60250 Tokat, Turkey |
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Abstract: | A total of 304Rhizoctonia solani isolates and 60 binucleateRhizoctonia-like fungi were recovered from stems and tubers of infected potato plants over a 2-yr period in northeast Turkey.R. solani isolates were identified to 11 anastomosis groups (AGs): AG-1 (0.66%), AG-2-1 (5.6%), AG-2-2 (0.99%), AG-3 (83.9%), AG-5
(4.6%), AG-6 (0.66%), AG-8 (1.32%), AG-9 (0.33%), AG-10 (1.32%), AG-12 (0.33%), and AG-13 (0.33%). In the greenhouse tests,
most of the AG-3 isolates were significantly more virulent than isolates belonging to other AGs on potato cv. Batum. Isolates
of other anastomosis groups differed in their virulence. Results indicated that AG-3 is an important pathogen on potatoes
grown in the study area. Five of 22 commercial and local potato cultivars evaluated for their reaction toR. solani AG-3 isolates (TP-2) under greenhouse conditions were highly resistant; the remaining cultivars exhibited different levels
of susceptibility to the pathogen isolate.
http://www.phytoparasitica.org posting July 14, 2005. |
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Keywords: | Potato Rhizoctonia solani anastomosis resistance |
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