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Studies were conducted to evaluate the stability of garden strawberries (Fragaria ananassa) to damaging factors of the winter period under the conditions of the Orenburg Transurals region (Russia). The studies were carried out from 2011 to 2014 at the strawberry plants collection plot located in the Orenburg region. The study included 25 strawberry varieties of different genetic and ecological-geographical origin.
The nature and extent of freezing in years with different weather conditions have been analyzed. In 2011/2012 there was a sharp drop in temperature to -25ºС in November and to -30ºС in February, but a steady snow cover reliably protected the plants. In 2012/13 the weather was abnormally cold ans snowless in early winter (-25ºС).
The weather conditions were extremely unfavorable for strawberry wintering and led to plant freezing. In 2013/14, in the middle of winter, there were hard frosts (-25 to -33ºС) for a rather long period of time, but the steady snow cover contributed to safe overwintering of the plants. The analysis of data on the degree of freezing and plant condition after the winter allowed to select varieties with high frost resistance and high restoration capacity. The main damaging factor in growing strawberries under the studied conditions is the low subzero temperatures during snowless winter periods. Strawberry varieties with high winter hardiness potential were Troitskaya, Vityaz, Kokinskaya zarya, Yemelya, Anastasia, Mishutka, Picnic and Torpeda. Therefore, they are recommended to be used as a starting material in breeding new varieties.
Source: Avdeeva, Z.A., Mursalimova, G.R., Dzhuraeva, F.K. 2015. All-Russia Selection and Technological Inst. of Horticulture and Plant Breeding. Orenburg Experimental Station of Horticulture and Viticulture (Russian Federation).
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