Search and creation of parental forms of primocane raspberry to improve its assortment

Abstract

The aim of the work was to identify genetic sources and donors in the transferring of the main economically valuable traits and properties to the hybrid offspring of primocane raspberry. The objects of researches were 30 primocane raspberry varieties of domestic and foreign breeding, 35 selected forms, as well as their offspring from controlled crossings, inbreeding and populations from open pollination with a total amount of more than 3,500 pieces of seedlings. The evaluation of parental forms and hybrid offspring was carried out on the hybrid plot and on the competitive variety testing plot in the period from 2016 to 2019. As a result of researches, it was established that reliable donors of early and compressed crop ripening are varieties Evraziya, Medvezhonok, Pingvin, Podarok Kashinu, Poklon Kazakovu, Snezhet’, as well as the selected forms 1-156-21 (Bryanskaya Yubileinaya open pollination), 1-16-11 (1-182-10 × Evrasiya), 13-118-1 (46-41-20 o.p.), 44-154-2 (Pingvin × Bryanskoe Divo), 5-19-1 (32-151-20 o.p.), 7-42-5 (1-16-11 o.p.). The best combinations of crossings in obtaining hybrids with a high load of stem generative organs were the Zhar-Ptitsa × Bryanskoe Divo, Podarok Kashinu × Atlant, 1-156-21 × 1-16-11, 13-118-1 × Podarok Kashinu, 44-154-2 × Poklon Kazakovu, 1-156-21 x Snezhet’ and populations from open pollination of primocane forms 3-59-30, 3-117-1, 9-77-10, 9-155-1, 29-101-20. In the hybrid offspring of these parents, a small number (from 2.5 to 10 %) of transgressive seedlings are guaranteed to be released, forming from 120 to 200 pieces of fruit, fl owers and buds per shoot. The large-fruited seedlings (average weight 5.5-6.0 g) are cleaved out in the offspring varieties of Atlant, Poklon Kazakovu, Karamel’ka, Podarok Kashinu, Nizhegorodets, Samokhval and selected forms 13-118-1, 4-111-1, 11-165-1, 3-59-30. In the breeding to increase the strength of primocane raspberry fruits, you should actively involve varieties Atlant, Karamel’ka, Zolotaya Osen’, Medvezhonok, Podarok Kashinu, Samorodok, Samokhval, Driscoll Maravilla, Poranna Rosa and a number of selected forms-3-170-1 (Atlant × Snehet’), 3-131-1 (5-46-30 o.p.), 9-163-3 (13-118-1 × 1-16- 11), 6-154-1 (44-154-2 × Poklon Kazakovu), 1-54-1 (7-141 o.p.), 9-113-1 (Atlant × Koldun’ya).