MANIFESTATION AMONG THE OFF SPRINGS OF THE FIRST TUBER GENERATION OF HYBRIDS FROM INTRASPECIES AND INTERSPECIES CROSSINGS OF THE MIDDLE MASS OF TUBERS
Abstract
The results of the study indicate a higher variation of the average weight of tubers in varieties-components of crossing (18–84 g), compared with interspecific hybrids, their backcrosses (27–46 g). In contrast, the maximum value of the lower limit of population limits from intraspecific crossing was 15 g, and from backcrossing in five combinations (25 % of all) – 20 g. The same applied to the upper limit of limits, respectively, 130 and 205 g. It is proved that the difference between the average population manifestation of the indicator is much larger among the combinations from backcrossing (25 g with a range of 23–48 g) than from intraspecific crosses, respectively, 11 and 30–41 g. The greatest influence of pollinators on the manifestation of the average mass of tubers among the offspring with the participation of the Podolia variety was established. The difference between the combinations was 8 g. Population blocks with varieties Tiras (maternal form) and Podolyanka (pollinator – 7 g) were only slightly inferior to it. traits in the offspring with the participation of varieties Basis and Podolia (difference 5 g) and Stream and Podolia with a difference of 11 g Only in one combination from intraspecific crosses and in four from backcrossing hybrids with an average weight of tubers of 100 g and more were isolated. Only in seven populations (29% of the total) was true heterosis positive, although this did not apply to any of the intraspecific origin. In 20 combinations, the degree of transgression was positive and only three did not show the frequency of transgression.
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