Biological potential of primocane raspberry in breeding on productivity

Abstract

Aim. The main purpose of the work was to study the biological potential of the productivity components of the raspberry initial forms of primocane type and the possibility of its increase in the hybrid offspring. Materials and methods . The objects of the researches were 12 cultivars, 13 selected forms, 12 hybrid combinations, populations from free pollination of the total amount of more than 1,500 seedlings. The research material used in the work was distinguished by a large genotypic and phenotypic diversity. The researches were carried out taking into account the basic provisions of the “Program and Methods of Breeding Fruit, Berry and Nut Crops.” Results . The estimation of initial primocane forms of raspberry and their hybrid offspring on productivity components has been carried out. The best genetic sources have been revealed by the number of fruit twigs on the shoot (cultivars of Zhar-ptitsa, Medvezhonok, Podarok Kashinu and selections 3-59-30, 9-113-1), large-fruited (cultivars Atlant, Oranzhevoe Chudo, Bryanskoye Divo, Poklon Kazakovu, Medvezhonok, Podarok Kashinu and selections 29-101-20, 3-59-30, 44-154-2, 7-42-3, 9-113-1 etc.), load stem generative organs (cultivars Bab’e Leto, Zhar-ptitsa, 3-117-1). The features of inheritance of productivity components have been established, the best combinations of crossings have been revealed. Conclusions . The phenotypic evaluation of the initial forms, the analysis of hybrid offspring and the obtained genotypes indicate to the high biological potential of the raspberry productivity of the primocane type and possibility of further gradual improvement.