The bulbous forms of interspecific hybrids of allium, their creation and evaluation

The paper presents the stages of creating bulbous forms between A. cepa L. and A. Vavilovii Pop. et Wed. through hybridization, in vitro embryo culture, backrossing, inbreeding and cross-breeding. As object of research were considered inbred progeny I15 from BC1.2F5 combinations of crossing of A. cepa x A. Vavilovii. The parent species A. cepa L. of the onion variety Odintsovets was the standard. In plants of the first year of vegetation studied signs: the color of dry scales of the bulb, the weight of the bulb, the index of the bulb shape and the number of leaves. Phytopathological assessment of onion plants for resistance to downy mildew (per-onosporosis) was carried out. In the progeny of interspecies hybrids plants were aligned on the color of the bulb (yellow and brownish). The average weight of the bulb varied from 33.5 to 92.3 g in generations I1-5 from ВС1, and in generations I15 from ВС2 it varied from 22...