Reproductive traits of some hybrid tea rose cultivars from the collection of the Nikita Botanical Gardens

S. Plugatar, Z. Klimenko, V. Zykova, D. Kuzmenko
There are about 250 cultivars of hybrid tea-roses, most popular in the horticulture garden group in the collection of the Nikita Botanical Gardens (NBG). The study of the reproductive peculiarities of hybrid tea-roses allows supplementing their introductive estimation in the conditions of the southern coast of the Crimea because the ability to form full-blown fruits and seeds is one of the introduction success criteria. What is more, the knowledge on the ability of cultivars to form fruits and seeds as well as their pollen quality are needed to involve the cultivars into hybridization as father- or mother seed parent forms. The comparative study of the pollen quality of 100 highly decorative hybrid tea-roses by the method of pollen grains staining with acetocarmine has been done. The pollen was gathered during the first blossoming phenological phase. It was elucidated that the studied cultivars are essentially different in the quantity of normally formed (being stained) pollen, which is from 5 to 81.9%. As a result, the collection cultivars were enrolled by the quantity of morphologically full-blown painted pollen into five groups: up to 20% (16 cultivars), from 20.1 to 40% (22 cultivars), from 40.1 to 60% (45 cultivars), from 60.1 to 80% (15 cultivars), and more than 80.1% (two cultivars). In total 60 cultivars, which belong to three last-named groups, are recommended to use as father seed parent forms while hybridization. Having studied fructification of hybrid tea-roses cultivars, it has been determined that 32 cultivars do not set fruits, 24 cultivars set singular fruits and only 44 set fruits massively and are recommended for use as mother seed parent forms during hybridization.
Plugatar, S., Klimenko, Z., Zykova, V. and Kuzmenko, D. (2021). Reproductive traits of some hybrid tea rose cultivars from the collection of the Nikita Botanical Gardens. Acta Hortic. 1324, 159-164
DOI: 10.17660/ActaHortic.2021.1324.24
pollen, fructification, hybridization, father seed parent form, mother seed parent form

Acta Horticulturae