ABSTRACT

This study was carried out to determine oil content, total phenolics, total flavonoids, and total antioxidant activity (according to DPPH and FRAP assay) of Corylus colurna (Turkish hazel), 18 Turkish standard hazelnut cultivars (Corylus avellana cvs. Tombul, Palaz, Çakıldak, Foşa, Mincane, Sivri, Kara, İncekara, Kalınkara, Cavcava, Yuvarlak Badem, Yassı Badem, Kargalak, Uzunmusa, Kan, Allahverdi, Okay 28, and Giresun Melezi) and 2 hazelnut clones (Corylus avellana cl. Kuş and Acı). Total phenolics of the hazelnut cultivars varied between 28.04 g GAE 100 g⁻¹ dw C. colurna and 113.01 g GAE 100 g⁻¹ dw (Allahverdi). The highest FRAP antioxidant activity was obtained from the ‘Yuvarlak Badem’ cultivar (269 mmol TE 100 g⁻¹ dw) and the highest DPPH antioxidant activity was obtained from the ‘Çakıldak’ cultivar (25.37 mmol TE 100 g⁻¹ dw). ‘Kan’ hazelnut cultivar had significantly higher total flavonoids (6.50 g QE 100 g⁻¹ dw) than the other cultivars and genotypes. The highest oil ratio was observed in ‘Sivri’ (72.6%) and the lowest in ‘Giresun Melezi’ (57.2%). Present findings revealed that among the newly registered hazelnut cultivars of Turkey, ‘Allahverdi’ cultivar was prominent for total phenolics and antioxidant activity; ‘Okay 28ʹ cultivar was prominent for oil content and ‘Giresun Melezi’ cultivar was prominent for protein and fatty acids.

摘要

进行这项研究是为了测定Corylus colurna（土耳其榛），18个土耳其标准榛子品种（Corylus avellana cvs。Tombul，Palas， Çakıldak，Foşa，Mincane，Sivri，Kara，İncekara，Kalınkara，Cavcava，Yuvarlak Badem，YassıBadem，Kargalak，Uzunmusa，Kan，Allahverdi，Okay 28和Giresun Melezi）和2个榛子克隆（Corylus avellana cl）。 。榛子品种的总酚含量在28.04 g GAE 100 g ^-1 dw C. colurna和113.01 g GAE 100 g ^{-1之间变化}dw（Allahverdi）。从“ Yuvarlak Badem”品种获得最高的FRAP抗氧化剂活性（269 mmol TE 100 g ^-1 dw），从“Çakıldak”品种获得最高DPPH抗氧化剂活性（25.37 mmol TE 100 g ^-1 dw）。“ Kan”榛子品种的总黄酮含量（6.50 g QE 100 g ^-1 dw）明显高于其他品种和基因型。“ Sivri”的最高含油率（72.6％），“ Giresun Melezi”的最低含油率（57.2％）。目前的发现表明，在土耳其新注册的榛子品种中，“ Allahverdi”品种在总酚和抗氧化活性方面表现突出。'Okay 28'品种的油含量高，'Giresun Melezi'品种的蛋白质和脂肪酸高。