Seeds viability and seedlings development of the tulips received from different combinations of crossing at juvenile age
In article results of six-year breeding researches of tulip culture from the moment of receiving hybrid seeds before five-year development of juvenile seedlings in the conditions of humid subtropics of Russia are presented. Viability of hybrid seeds received from different combinations of crossing differed considerably - from 1,4 to 98,3 %. This indicator doesn't speak about further good development of seedlings and high percent of formation affiliated bulbs. The second year of seedlings development is especially indicative since at this stage there is an active natural selection. The size and weight of biannual bulbs considerably differed according to origin. Further distinctions of elevated plant organs development intensity and bulbs weight were even more noticeable. The cultivars combinations, which have given large seeds to four-five-year-old age, have shown also big intensity of increase of bulbs vegetative weight. Studying of seedlings growth and development has shown that practically from two-five-year age it is possible to make early selection of tulip forms, which are capable to increase vegetative weight intensively.