Fruit growing
and viticulture of South Russia

Annotation

The task of our research was to obtain the large-fruit plum-shape hybrid of tomato with the complex of commercially valuable characteristics and the study of confumity of heredity of plum-shape form of fruits, and also the revealing of the optimal kinds of parent couples. For obtaining the large-fruit tomato hybrids with plum-shape fruit 10 lines of tomatoes, were divided in two groups according to the fruit form. The first group contains 6 lines with round fruit and middle or large fruit size. The second group contains 4 lines with plum-shape, long-plum shape and cylindrical shape of the fruit. As a result of crossings the F1 tomato hybrids in 48 straight and inversed combinations were obtained. The comparison of the results of straight and inversed crossings showed no statistically significant difference in the fruit form index. The middle dependence of the fruit form index from the parent lines change was revealed (the correlation coefficient was r = 0,68�0,05). The most stability in form of fruits showed the round-shape combinations, the plum-shape combinations showed lower stability. The correlation between the middle fruit weight and the fruit form index were shown. In the first crop rotation its coefficient was r=-0,63 and for the second rotation the coefficient was r=-0,56. On the basis of results of experience two hybrids were transferred to a production variety testing, following results of which the hybrid k-505 has brought in the State Register under the name "T-34". The important feature of this hybrid: all tomato fruits in a brush have the almost identical size. This hybrid is highly productive, with long productivity and it is steady against biotic factors of the environment.