Abstract
The article presents the results of testing twelve promising hybrids (six combinations) in nurseries of competitive testing (1 and 2 years) in the conditions of Central Yakutia, conducted in 2018–2019. (the characteristics of weather conditions are presented). All of them belong to the group of early maturing and mid-early (55-70 days): 216 (Dachny × 128-6), 239-1, 239-2, 239-3 (Ladoga × Rosalind), 233, 233-2 (Slavyanka × Rosalind ), 237, 237-1 (Northern × Dubrava), 232 (Aurora × Bonus), 234 (Scarlet Sail × Victoria). The evaluation showed that the studied hybrids correspond to the model of the variety in terms of economically valuable traits: they have a high yield, good biochemical parameters, the appearance of the tubers meets the requirements of consumers (small superficial eyes, medium-deep stolon footprint), high keeping quality during storage, tasting assessment of tubers - 4 0 points. The studied samples of hybrids had a yield of 26.0 - 42.0 t / ha, marketability of 92–97%, which makes them economically valuable. The samples differed in the content of dry matter (18.4–22.1%) and starch (9.5–13.4%). The nitrate content in tubers did not exceed the permissible concentration. The studied samples are resistant to the most common diseases of the zone: viral (common mosaic, leaf twisting, curliness, wrinkled mosaic, etc.), macrosporiosis, rhizoctonia, common scab. Based on the results of the studies, potato hybrids 232 (Aurora × Bonus), 233 (Slavyanka × Rosalind) and 239-2 (Ladozhsky x Razolind) were selected for further study and transferred for resistance to the causative agent of cancer and nematodes.
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