Some interesting features of the influence of parent plants on the characters and properties of their hybrids. Sadovod. No. 9. 1913
Selected Writings, p. 93

Ivan Michurin

Rose 'Slava Sveta'

Among my numerous hybridization experiments, I had occasion to cross a hybrid of the Damask rose and the Capuchin Persian Yellow rose with the Polyantha rose known as Clothilde Soupert; and the resultant hybrid seedling proved to have such a poor root system that, in order to save it from imminent death, I had to move it with all speed to other roots; which I did by bark grafting it, when it had only sprouted its fourth leaf, upon a seedling of Rosa canina. (Such grafting is usually successful only if the hybrid, bark grafted onto the stock as a green cutting, is protected by a glass cover.) And afterwards this hybrid developed into a very fine attar rose variety, with perfectly formed full double pink flowers and a delightful and remarkably strong fragrance. A trial steam distillation by means of a small laboratory still showed that the flowers contained a much higher percentage of attar than the regular Damask rose. (This rose variety, which I have called Slava Sveta, is described in detail, with a photograph of the flowers, in the Vestnik Sadovodstva, Plodovodstva i Ogorodnichestva for 1907, No. 7-8.) It is also in place to call the reader's attention to the very interesting fact that this hybrid has such remarkably fragrant flowers while the external appearance of its other parts, as for example the shape of the leaves and shoots, is completely identical with those of the Capuchin Yellow Rose—in consequence of which this new variety has been classed with that species. It is quite evident here that the hybrid derived only the shape and structure of its flowers from the paternal plant, namely the Clothilde, and all its other properties from its grandfather and grandmother. Its strong flower fragrance was inherited from the grandmother, the Damask rose; and it is interesting that the disagreeable odour of the flowers of the grandfather plant—the Capuchin Yellow rose—far from spoiling this fragrance, considerably intensified and improved it. Further, the outward appearance of the new variety's leaves and shoots is inherited entirely from its grandfather, the Capuchin Yellow rose. Thus, this instance too—as most others, with very few exceptions—bears out that hybrid plants derive their characters and properties not from the immediate parents, the father and mother, but from the grandfathers and grandmothers, in different combinations of their properties.

Clothilde Soupert x (Kazanlik x Persian Yellow)

Slava Sveta (слава света) = Glory of the World

Attempts to accelerate the onset of bearing in hybrid seedlings of fruit trees.
(Results of Sixty Years' Work. 1934) Selected Writings, p. 263
Ivan Michurin

This method [grafting seedlings] often has to be resorted to when the structure of the hybrid's root system happens to be poor. This was observed, for example, in the case of a new variety of the attar rose Slava Sveta. The hybrid seedlings obtained from fertilizing the yellow Persian rose with the pollen of the Damask rose rapidly perished, even before they attained a height of 5 cm., owing to the poor development of the root system. [CybeRose notes: This may be a mistranslation. In other reports, ‘Kazanlik’ is said to be the seed parent.]

 

Influence of the scion on the structure of the root system of the stock
Selected Writings, p. 122
Ivan Michurin

Several strains of roses were grafted on a bed of wildlings of the Rosa canina. Among them was a new Rosa lutea hybrid which I bred. Three years after the grafting all the roses from this bed were dug up for transplantation, and it turned out that, with few exceptions, all the specimens of the grafted Rosa lutea [hybrid] had absolutely smooth roots, without any branchings and fibrils as is usually the case with the Rosa lutea on its own roots. At the same time all the grafts of the other strains had a well-branched and fibrillous root system. Of course, such an example of particularly strong influence of a scion on a stock is an exception. Nevertheless, it is a fact, and horticulturists must bear this phenomenon in mind. Even though it may manifest itself in other plants in a lesser degree, but manifest itself it will all the same.

FIG. 7.—STOCKS FOR ROSES—III. SEEDLING BRIER.