Özet:

In Turkey chestnut cultivation is threaten by chestnut blight, chestnut root rot and Asian chestnut gall wasp. In order to obtain tolerant cultivars to the pests and diseases hybridization studies were performed. As a result, A14, A25, A41 and A100 hybrid chestnut genotypes were selected as superior. Some of these genotypes were registered by ‘Republic of Turkey Ministry of Agriculture and Forestry Variety Registration and Seed Certification Center’. A14 genotype named as ‘Akyüz’ and A100 named as ‘Macit 55’. Grafting studies were performed with these genotypes and cultivars. However, due to graft incompatibility survival ratio was found low. To avoid graft incompatibility, own seedlings may be better candidate as rootstocks because of the degree of compatibility. In this study seedling rootstock potential of ‘Akyüz’, ‘Macit 55’ cultivars and A25, A41 genotypes were examined. ‘Marigoule’ cultivar used as control. The study was conducted between 2013 and 2015 at Ondokuz Mayıs University, Samsun, Turkey. In the study healthy seed ratio (%), seed emerging ratio (%), suitable for grafting seedling ratio (%), seedling diameter (cm), coefficient of variation (CV) of seedling diameter and seedling productivity (%) were investigated. As a result of the study, all genotype and cultivars were found superior in terms of their generative rootstock characteristics. However, a great variation was observed among the rootstocks over the years. Therefore, studies should be conducted to determine the effect of xenia on rootstock candidates in nut species where generative rootstock use is necessary. Also, to find out the graft compatibility of these genotype and cultivars grafting studies should be done and they should be evaluated for long-term.