Sources of restrained growth and compactness of the crown that are promising for bird cherry breeding

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Abstract
In Siberian decorative gardening, random bird cherry seedlings are used. To date, bird cherry has not been widely distributed in Russia due to the high height of the bush and insufficient fruit weight. Meanwhile, plants with different decorative characteristics are found inside each species. Obtaining decorative varieties gives us the opportunity to have highly decorative plants with known characteristics in urban plantings. The research was carried out in 2010—2023 at the introduction plot of the Laboratory for Food Plants Introduction of the CSBS SB RAS (Novosibirsk). Our research has shown the wide intraspecific variability of these species in many decorative features and the prospects for creating new highly decorative varieties based on them through intraspecific breeding and interspecific hybridization. Special attention is paid to samples with a restrained kind of crown growth. Three samples were identified: ‘Rozovaya Mechta’, the selected form ‘14-6-53’ and the selected form of the common bird cherry for further work in breeding with the involvement of these forms with traits of stunting, compactness and abundance of fruiting.

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