Kharkivska Oblast, where the Plant Production Institute named after V.Ya. Yuriev is located, has a set of satisfactory and acceptable conditions for rape growing. However, sharp temperature changes in autumn and dry winds in spring can negatively affect not only the growth and development, but also the viability of both winter and spring rape plants.
The Plant Production Institute named after V.Ya. Yuriev of NAAS started winter rape breeding in 2006. There were no cultivars suitable for growing in the eastern Forest-Steppe of Ukraine, which prompted breeders to work at this challenge.
The developed winter rape cultivars give higher yields and are more resistant to lodging. In addition, there are the following advantages of the winter rape cultivars bred at the PPI named after V.Ya. Yuriev:
- Intensive root growth during the early stages of development, which allows plants to absorb water from the lower soil layers;
- Resistance to late frosts (8.5-9 points);
- They are less demanding to growing conditions due to a stronger root system, which is able to absorb poorly soluble substances, providing more stable yields;
- Synchronous development of primary branches, which guarantees simultaneous ripening of seeds on the plant;
- Formation of pods in the upper third of the plant, which improves mechanized harvesting;
- High resistance pod shattering; around 5% of shattered pods after a two-week dead-ripe stage;
- Resistance to thawings due to deeper winter dormancy.
To date, three winter rape cultivars have been created and submitted to the state variety trials: two food cultivars one technical cultivar.