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Institute of Vegetables and Melons of NAAS





Goal. Selection of sources of valuable economic traits and  creation of parthenocarpic and bee-pollinated gynaecium lines of pickling cucumber for breeding to create competitive heterosis hybrids.

Results and Discussion. The research formed models of completed scientific products - lines for the heterosis breeding of pickling cucumber. The result of breeding for open ground is a number of bee-pollinated  gynaecium lines of pickling cucumber: P 57-745-11, Mag 58962, Toma 15, SD 96-15, M 57-718-11, RD 96 2-95. For protected ground, three parthenocarpic lines of pickling cucumber were created: F №11-13, LCD 532-15, BM-13. The new lines were created by individual selection upon intravarietal crossing and inbreeding (I4-7) for several generations. New bee-pollinated lines belong to the early (37-41 days) and middle-early ripeness groups; the time from mass germination to the first harvest is 42-45 days; fruiting period is 23 - 30 days. The lines consist of male and female plants. Their gynaecium precentage is 55-85%. The highest gynaecium precentage (85%) was observed in three lines: P 57-745-11, Mag 58962 and Toma-15. Two lines (P 57-745-11 and Zh 57-718-11) were recorded as the most sort-season. Their "bunch" (fascicular) arrangement of female flowers – by 2-3 per node - is a valuable economic feature. New parthenocarpic lines belong to the early ripeness group; the period from mass germination to the first harvest is 35-41 days; their fruiting period is much larger and is 39-51 days. The lines consist of male and female plants. Their gynaecium precentage is 60-100%. The lines have "bunch" arrangement of female flowers – by 3-5 per node. New parthenocarpic female  lines, Zh 11-13 and ZhK 532-15, are the best of them, characterized by high parthenocarpy (0.68 - 0.72); their gynaecium precentage amount to 100%; they have "bunch" arrangement of female flowers; the number of flowers per node is 5 - 7 or more. All the lines have cylindrical buttons with the length meeting the requirements to pickling genotypes (6-9 cm). The shape of buttons is cylindrical; the surface of fruits is torulose or large-pimple. The total yields of new bee-pollinated ranged from 20.8 to 36.2 t / ha over the study years; lines Mag 58962, SD 96-15 and Toma-15 had the highest yields; their yield capacity was considerably higher than the standard one. The commercial yields of the lines ranged from 16.7 - 34.4 t / ha. The vendibility of the lines ranged from 79 to 95%, the highest marketability marked line Mage 58,962 and Tom, 15, respectively 92 and 95%. Based on the trial results of new parthenocarpic lines, the average total yield was determined; it amounted to 13.8 - 17.0 kg / m2, which was by 7% and 4.5 - 28.8% higher than the standard ‘Nadia’ F1 and ‘Krispina’ F1, respectively. Lines Zh 11-13 and ZhK 532-15 had the highest average total yield of 17.0 and 16.7 kg / m2, respectively. The vendibility is very high and amounts to 89 - 95%. It was the highest in  line Zh 11-13 (95%). Palatability traits of the new lines are excellent. Fruits are not bitter. The tasting score for fresh fruits of bee-pollinated lines is 4.40 - 4.90 points; for canned ones - 4,78 - 4,91 points. For parthenocarpic lines, this score is 4.75 - 4.90 and 4.61 - 4.90 points for fresh and canned fruits, respectively. New parthenocarpic lines are characterized by high resistance to root rots and downy mildew (7 points); bee-pollinated lines are considered as relatively resistant (5 points) or resistant (7 points) to downy mildew and bacterial diseases. High resistance was noticed for lines P 57 / 745- 11 and Mag 58 962.

Conclusions. The studies distinguished valuable gynaecium breeding material of pickling cucumber, from which new bee-0pollinated and parthenocarpic lines of pickling cucumber were generated.  The new lines have been involved in breeding to create competitive heterosis pickling cucumber hybrids. Using the new lines, a number of F1 hybrid combinations were created, and the breeding work continues.


cucumber, kornishonnyy type, hinoetsiyni lines, earliness, yield, marketability, stability