New sea buckthorn cultivars for Northern conditions


Saila Karhu, MTT Agrifood Research Finland, Horticulture,
Toivonlinnantie 518,FIN-21500 Piikkiö, Finland,

A breeding programme was carried out in order to develop sea buckthorn (Hippophaë rhamnoides) cultivars with good adaptability to northern climatic conditions, combined with high disease resistance and quality yield. Seedlings and selections originating from Finnish, Central European and Caucasian wild strains and Altai cultivars were evaluated at different test sites. Notable variation occurred in several characteristics both between and within progenies. Such characteristics as growth vigour, thorniness, content of vitamin C in berries and disease resistance correlated with the traits of parental pistillate plants. Progenies of Altai cultivars were seriously affected by stem canker (Stigmina sp.). Parental plants originating from the Baltic Sea region transmitted resistance towards this disease. The pistillate cultivars named ‘Terhi’ and ‘Tytti’ and the staminate cultivar named ‘Tarmo’, all based on Finnish natural strains, were released for cultivation. They expressed moderate growth vigour, good disease