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Breeding for frost resistance in the potato. I. The frost resistance of the foliage of wild species and primitive forms of the potato and their relationship to the altitude of the species area

Breeding for frost resistance in the potato. I. The frost resistance of the foliage of wild species and primitive forms of the potato and their relationship to the altitude of the species area

Z. Pflanzenz, 45: 259-99

About 470 South American varieties of potato from 258 sources were tested by exposing single leaves to -2.50 degrees C. for 3 hr. in a moist atmosphere. Frost resistance was found to be independent of environmental conditions and did not vary with the stage of development. For large-scale tests, young seedlings were found to be most suitable. Plants showing visible signs of virus infection were more resistant than normal plants.

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