Dec 2025 DOI 10.14302/issn.2639-3166.jar-24-5295
The present study of the reproductive ability of currant and gooseberry hybrids after long-term cryopreservation of pollen in liquid nitrogen is of enormous importance for organizing the conservation of the diversity of this crop. Four distant interspecific hybrids of currant and gooseberry served as objects of the study. The pollen fertilizing ability was studied by pollination of allotetraploid Jošta with pollen of tetraploid hybrids stored for a year at ultra-low temperatures (–196°C) and freshly collected pollen (control pollination). Berry set in 2022, when pollinated with cryopreserved pollen, averaged 56.4% and was higher than in the control pollination (38.2%). In 2023, the number of berries set on average for all cross combinations in the experiment was also quite high (59.6%), but lower than in the pollination control (81.4%), which can be explained by unfavorable weather conditions during pollen collection in the year of establishment (2022). The obtained data specify that pollen of the allotetraploids does not lose its high fertilizing ability during its long-term cryopreservation. Berry setting, average berry weight and seed production are quite high and comparable to pollination with freshly collected pollen (control pollination variant). Seed germination and values of morphometric parameters of seedlings obtained from pollination with cryopreserved and freshly collected pollen in most cases have close values. Cryopreservation of pollen of currant-gooseberry hybrids for a year and more allows to preserve pollen for successful pollination and berry formation and is a reliable way to preserve germplasm.
Sep 2021 DOI 10.14302/issn.2639-3166.jar-21-3955
In the cultivation of vines the risk of hail appears to be increasing with the ongoing climate change. The use of protective plastic nets is spreading, but there is little knowledge on the additional processing costs and on the phenological and qualitative consequences, moreover, as depending on different colors of the nets. Thus, a randomized trial was carried out in Nebbiolo, a wine of great aging, testing three plastic anti-hail nets colored in green, gray and black. Results showed that 24% more-time was necessary for the canopy management practices under the nets. The black nets advanced the ripening process, with a berry weight decrease of about 13%. A significant decrease in the seed number per berry was observed under the black nets (-45%), while a rise (+102%) was observed under the green and gray nets with a parallel increase in the pH of the juice (+13%) and in malic acid (+28%) under the green nets. The berry skin did not show any significant differences in polyphenol and anthocyanin profiles, while the plants that matured in the upper part of the vineyard showed higher level in the berry skin extractable flavan-reactive to vanillin, and total polyphenol. On the other hand, in the seeds grown under green nets an increase in the extractable polyphenol compounds was observed, sign of a delay in seed ripening, with a higher tannin polymerization ratio, preserving the malic acid, and decreasing the acidity of the berry. In conclusion, the use of colored green may be a useful tool against excessive microclimatic warming and / or irradiation. The field internal variability affects much more the ripening dynamics than the nets used. A second aim was to develop a smart NIR SCiOTM model for polyphenols and the results were in line with the favorable expectations, providing R2 predictions of about 0.74 from the skin and 0.81 from the seeds.