Hort. Sci. (Prague), 2016, 43(3):126-133 | DOI: 10.17221/206/2015-HORTSCI
Tolerance of peach flower buds to low sub-zero temperatures in winterOriginal Paper
- Department of Breeding of Horticultural Crops, Research Institute of Horticulture, Skierniewice, Poland
After each of three consecutive winters, 2010/2011, 2011/2012 and 2012/2013, the extent of frost damage to flower buds was studied in 25 genotypes of peach growing in the collection of varieties in the Experimental Orchard in D±browice near Skierniewice (central Poland). The lowest temperatures during those winters were quite similar: -22.3°C (February 22, 2011), -23.3°C (February 3 and 4, 2012), and -21.4°C (March 24, 2013). However, after the winters of 2010/2011 and 2011/2012 the extent of damage to peach flower buds was much larger than after the 2012/2013 winter. This was caused by different weather patterns during those winters. During the 2010/2011 and 2011/2012 winters, before the occurrence of the lowest temperature, there were periods of above-zero temperatures, which resulted in a reduction in tolerance of flower buds to severe winter frosts. During the 2012/2013 winter, sub-zero temperatures persisted for most of the time, which helped the flower buds to maintain high tolerance to low sub-zero temperatures until late March.
Keywords: frost damage; winter hardiness; peach breeding; winter dormancy
Published: September 30, 2016 Show citation
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