Winter hardiness in the U.S. Department of agriculture malus core collection

J. J. Luby, D. S. Bedford, P. L. Forsline

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


A group of 200 Malus accessions have been designated as a "core" of the complete collection held by the Plant Genetic Resources Unit (PGRU) of the U.S. Department of Agriculture (USDA) at Geneva, New York. A replicated planting of this core collection was established at Excelsior, Minnesota, USA in 1994. In 2002, the planting was evaluated for winter injury (WI) accumulated over 8 winters. The minimum temperatures during this period were lower than -26°C on several occasions with the lowest temperature of -38°C occurring in February 1996. Among the hardiest entries were accessions M. asiatica, M. baccata, M. brevipes, M. floribunda, M. ioensis, M. orientalis, and M. sieversii. Among the hardiest M. × domestica entries were cultivars from Canada, Russia and the northern US including the cultivars Antonovka Kamenichka, Cortland, Haralson, Keepsake, McIntosh, Novole, Petrel, Viking, Yellow Transparent.

Original languageEnglish (US)
Title of host publicationXI Eucarpia Symposium on Fruit Breeding and Genetics
PublisherInternational Society for Horticultural Science
Number of pages4
ISBN (Print)9789066053861
StatePublished - Jan 1 2004

Publication series

NameActa Horticulturae
ISSN (Print)0567-7572


  • Apple
  • Germplasm evaluation
  • Low temperature
  • Winter injury


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