Abstract

In Central Russia, the area of possible effective use of raspberry varieties and their productivity and production values are determined by the plant tolerance to a complex of adverse environmental factors. In this regard, the introduction of new varieties and hybrids should be accompanied by analyzing not only their productivity, but also their winter hardiness and drought resistance. In this paper, we analyzed the winter hardiness of raspberry varieties and indicators of their water regime in the field. By modeling the damaging factors of the winter period, we revealed the stability potential of raspberry varieties for the main components of winter hardiness. The drought resistance of raspberry varieties and forms were assessed in laboratory conditions. According to the results of the complex studies, we identified the frost-resistant accessions: 9-17, 9-35, and 9-70 (freezing ranged from 1.1 to 2.0 points) as well as the medium-hardy varieties Glen Ample, Glen Magna, and Laszka (freezing score ranged from 2.1 to 3.0 points). The indicators of the water regime in the field showed that during the growing season, the studied raspberry varieties were characterized by optimal hydration and water deficiency of the leaf apparatus. This positively affected the yield formation. When modeling drought, raspberry genotypes showed a medium level of drought resistance. At the same time, the Glen Ample, Glen Magna, Glen Lyon, and Laszka varieties as well as the accession 9-70 showed high yields (above 15 t/ha). As a result, promising raspberry genotypes Glen Ample, Glen Magna, Laszka, and 9-70 were selected for further breeding and production cultivation in Central Russia.

Highlights

  • Raspberry is an economically profitable berry crop with valuable production, biological, and nutritional qualities [1]

  • The purpose of this work was to study the winter hardiness, drought resistance, and productivity of introduced raspberry varieties and accessions bred at VNIISPK and to identify the most promising ones for breeding and cultivation in Central Russia

  • Winter hardiness at the level of the control variety was revealed in genotypes 9-17, 9-35, and 9-70 in which the tissues of annual shoots and buds were damage by 25%

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Summary

Introduction

Raspberry is an economically profitable berry crop with valuable production, biological, and nutritional qualities [1]. Minerals, and essential organic acids contained in raspberries ensure health and longevity [2]. Over 70% of the raspberry production is concentrated in Europe. In North America, raspberries are grown in the USA and Canada (10,000 t/year), whereas South American countries are planning to increase production. The world’s major raspberry producers are Russia with an average output of 156.889 tons, followed by the Republic of Serbia with an average output of 84.633 tons, Poland with 62.715 tons, the USA with 55.772 tons, and Ukraine, England, Canada, Mexico, Spain, France, Germany, Hungary, Bulgaria, and Bosnia and Herzegovina. On the European continent, with an increased raspberry production, the berries are grown on 83.028 ha and the yield averages 397.708 tons, which is 4.80 t/ha [3]

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