Correlation between Vegetative and Reproductive Indicators in the Bulgarski Rubin Raspberry Cultivar

Abstract

The aim of this study is to trace and establish the correlations between the vegetative (average number, average height, and average thickness of shoots) and reproductive characteristics (average fruit weight and average yield) of the Bulgarski Rubin cultivar grown in the semi-mountainous conditions of the Central Balkan Mountains. Bulgarian raspberry varieties are adapted to our soil and climatic conditions and successfully realize their genetic potential in them. The study was conducted during the period 2018–2020 in a demonstration plantation of Research Institute of Mountain Stockbreeding and Agriculture, Troyan, which was established in 2016, with a planting scheme of 3.00/0.50 m. The study was carried out in two stages: the first stage was carried out in 2018, and the second stage was carried out in 2019. Statistical analyses show a high correlation between the average number of shoots and the average yield during the first two experimental years, and very high in the third year. During the three-year period, a very high correlation was found between the vegetative indicators of average height and average shoot thickness.