Rootstock SUNGORSKINA MEMORY

Technological Potential of the "Pamyati Sungorkina" Rootstock

The breeding work of the Michurinsk State Agrarian University (FGBOU VO Michurinsky GAU) is focused on developing genetically stable rootstocks capable of performing effectively in temperate climates. The "Pamyati Sungorkina" rootstock is the result of focused breeding aimed at ensuring stable interaction with apple scion components. Its biology is based on the ability to develop a robust and balanced root system, which is critical for the nutrition of intensive orchards.

Biometric Characteristics and Adaptability

A primary objective in creating this rootstock was to achieve a high compatibility index with major commercial apple varieties. The practical value of "Pamyati Sungorkina" lies in the following:

• Physiological Compatibility: High tissue fusion in the trunk zone ensures high-quality nutrient transport, minimizing the risks of graft rejection and premature scion mortality.
• Winter Hardiness: A cold resistance rating of down to -25°C makes the material suitable for regions with moderate winter temperatures. The root system demonstrates sufficient frost resistance for these latitudes, preventing tree loss during short-term soil freezing events.
• Nursery Efficiency: The rootstock exhibits good propagation rates, making it economically advantageous for planting material producers.

Choosing this rootstock is justified for orchardists who prioritize predictability in the vegetation cycle. The stability of metabolic processes, provided by the varietal characteristics of "Pamyati Sungorkina," allows the plant to enter the fruiting phase faster and maintain productive longevity for a longer period. It is a proven tool in the arsenal of agronomists working with apple crops in conditions that require a balance of classical reliability and adaptability to temperature fluctuations.