Ring rot symptom development on potato cultivars and lines in southern Alberta |
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| Authors: | G A Nelson D R Lynch G C Kozub |
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| Institution: | (1) Research Station, Agriculture Canada, Main, P.O. Box 3000, T1J 4B1 Lethbridge, Alberta, Canada |
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| Abstract: | Summary Plants were grown in the field from seed pieces of potato cultivars injected with ring rot bacteria (Corynebacterium sepedonicum). Symptoms were produced with both 18 and 180 colony forming units (cfu) on cvs Norchip and Red Pontiac and with 180 cfu
on cv. Belrus plants. Tuber symptoms were detected in all cultivars except Belrus and Teton. Tuber progeny produced plants
that developed top symptoms on all cultivars except those of cv. Nooksack, Russet Burbank, and Teton. Tuber progeny of the
second crop produced both plants and tubers with symptoms developing only in the cv. Nooksack. In another 3-year experiment,
variability in the disease response of selected cultivars and lines was examined following knife-inoculation of tuber seed
with a high level of ring rot bacteria. Significant correlations between top and tuber symptoms were detected, but they were
not high enough to make unnecessary the examination of both top and tuber symptoms in ring rot disease selection studies.
Contribution no. 3879111 |
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| Keywords: | Corynebacterium sepedonicum dwarf-rosetting Solanum tuberosum L |
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