Analysis of the contingency of traits in Rubus L. in connection with further selection

Abstract

Blackberries are a valuable and promising berry crop that has spread in Europe and America. In Russia, breeding is at an early stage of development, which has led to the production of a single variety so far. In this regard, the goal of the study was set - to determine the conjugation of quantitative traits of blackberries for further selection. The article studied 8 varieties of blackberries ('Karaka Black', 'Natches', 'Loch Tay', 'Columbia Star', 'Ark Prime Freedom', 'Black Gem', 'Black Magic', 'Heaven Can Wait') in the collection of the nursery in the south of Russia. The relationships between the following quantitative traits were studied: yield, weight of berries, length of berries, amount of sugars, average number of drupes per fruit, length and width of central leaflet, length of petiole, thickness of petiole, number of leaflets, average height of replacement shoots, total length of replacement shoots, potential the number of cuttings from one bush and the number of fruits on the lateral. Correlation analysis was used to identify reliable connections between the signs. Found a strong positive relationship between berry length and weight, as well as the average number of drupes per fruit. The amount of sugars in a close positive relationship with the number of leaves. Also interrelated are the average number of replacement shoots per plant, the total length of replacement shoots and the potential number of cuttings per bush. A negative weak relationship was noted between pairs of traits: berry length and average number of replacement shoots; berry length and potential number of cuttings per bush; the width of the central leaflet and the number of fruits on the lateral.