Tomato (Solanum lycopersicum) is the most important vegetable crop globally; however, its production is often hindered by soil-borne biotic and abiotic stresses. The use of rootstocks provides an effective strategy to mitigate these soil-related challenges. Hence, the development of new rootstock cultivars remains crucial to meet the demands of rapidly changing environmental conditions. Wild tomato species represent valuable genetic resources for rootstock improvement and are increasingly utilized in rootstock breeding programs. Nevertheless, the genetic mechanisms, particularly quantitative trait loci (QTL), underlying rootstock–scion interaction, remain poorly understood. In this study, 38 introgression lines (ILs) derived from S. lycopersicoides were used as rootstock and grafted with the commercial cultivar ‘Torry F₁’ to evaluate their effects on morphological and fruit quality traits under greenhouse conditions. The evaluations included assessments of morphological and fruit quality traits for QTL analysis. A total of 19 QTLs were identified, associated with 11 traits such as yield, antioxidant capacity, flavonoid content, and fruit color parameters (L*, a*, b*, C*, h°), with the phenotypic variance explained ranging from 12% to 61%. Of these QTLs, seven favorable alleles originated from S. lycopersicoides, notably including a major yield-associated locus (Fy5.1). In addition, the identification of a QTL for scion stem thickness (Tsc3.1) highlights the genetic contribution of the rootstock to scion development. This study represents the first evaluation of the rootstock potential of S. lycopersicoides ILs and provides novel insights into the genetic basis of rootstock–scion interaction in tomato. The identified QTLs offer valuable information for future breeding efforts aimed at developing improved rootstock cultivars for sustainable tomato production.

En tr In this study, beefsteak (cv. ‘Tybif’), heirloom (cv. ‘Yuksel Koy’) and cluster types (cv. ‘Merkur’) of tomato were harvested at breaker stage of maturity and stored at 20ºC temperature and 60±5% relative humidity for comparing their ethylene production, respiration rate, postharvest performance and nutritional characteristics. Analysis for weight loss, antioxidant activity, carotenoid, flavonoid, total phenolics, ascorbic acid contents, ethylene production, respiration rates and amount of unmarketable fruits were determined during 21 days of storage. Weight loss, ethylene production, respiration rate, carotenoid content and amount of unmarketable fruits exhibited increase whereas flavonoid and ascorbic acid content showed decrease with extending storage duration. Maximum antioxidant activity, carotenoid, total phenolics and ascorbic acid contents and minimum weight loss, ethylene production and respiration rate were noted in beefsteak type of tomatoes. Based on results obtained it can be concluded that beefsteak type of tomatoes can be successfully stored with maximal nutritional quality for 21 days of storage as compared to heirloom and cluster types of tomatoes. Bu çalışmada beef (cv. ‘Tybif’), köy (cv. ‘Yüksel Köy’) ve salkım tipi (cv. ‘Merkür’) domatesler çakır (dönüm) olum aşamasında derilmiş ve derim sonrası performansları, etilen üretimi, solunum hızı ve fitokimyasal özelliklerini karşılaştırmak amacıyla 20ºC sıcaklık ve %60±5 oransal nemde muhafaza edilmiştir. Çalışmada, 21 gün süren muhafaza süresince ağırlık kaybı, antioksidan aktivitesi, karotenoid, flavonoid, toplam fenolik maddeler, askorbik asit içerikleri, etilen üretimi, solunum hızı ve pazarlanamaz ürün miktarları belirlenmiştir. Muhafaza süresince ağırlık kaybı, etilen üretimi, solunum hızı, karotenoid ve pazarlanamaz ürün miktarları artış buna karşın flavonoid ve askorbik asit miktarları ise azalış göstermiştir. Maksimum antioksidan aktivite, karotenoid, toplam fenolik madde, askorbik asit içeriği ile en düşük ağırlık kaybı, etilen üretimi ve solunum hızı beef tipi domateslerden elde edilmiştir. Araştırma sonuçlara göre, raf ömrü koşullarında muhafaza edilen beef tipi domatesler, köy ve salkım tipi domateslere göre daha yüksek besin içeriğine sahip olmuştur.

The aim of this study was to investigate the effects of 1.5, 3.0 and 4.5 kJ/m2 UV-C illumination doses on the postharvest quality of fresh fig (cv. Bursa Siyahi). For this purpose, fruit were stored at 0 ºC temperature with 90-95% humidity for 21 days and some fruits were kept at 20 °C for 3 days to simulate a period of shelf-life. UV-C treatments did not affect fruit firmness, total soluble solids, and titratable acidity content during cold storage and shelf-life. On the other hand, UV-C doses increased total phenolic content and antioxidant activity compared to control. In both storage conditions, 3.0 and 4.5 kJ/m2 UV-C doses were found to be more effective to control unmarketable fruit rate. In conclusion, a 4.5 kJ/m2 UV-C illumination dose can be effective in maintaining the postharvest quality of fresh fig fruit harvested at a 2/3 maturity stage.