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Breeding potatoes for resistance to ring rot



Breeding potatoes for resistance to ring rot



Phytopath 37(8): 539-555



49 progenies of potato seedlings derived from crosses involving resistant and susceptible parents were tested for resistance to the ring-rot disease (Corynebacterium sepe-donicum). No resistant seedlings, or very few, occurred in the progenies when both of the parents were susceptible. A relatively high percentage of a progeny was resistant when one or both parents were resistant. The percentage of resistant seedlings was increased when both of the parents were resistant or when resistant parents were self-fertilized. Resistance of the tubers alone to ring-rot decay also was transmitted to the progenies when resistant parents were used for making the crosses. When certain seedlings resistant to ring rot were crossed with seedlings that are resistant to late blight, Phytophthora infestans, a number of selections were secured that are highly resistant to both diseases. Some of these selections have desirable marketing qualities besides being resistant to ring rot and late blight.

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Accession: 013652903

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