Physico-Chemical and Antioxidant Characteristics in Fruits of Walnut (Juglans regia L.) Genotypes from Inner Anatolia

Omer BEYHAN, Sadiye GOZLEKCI, Muttalip GUNDOGDU, Sezai ERCISLI

Abstract


Walnut fruits are used for their nutrition properties for a long time in Anatolia, where seed propagated walnuts are naturally found, as solitary individuals or dense populations. Some relevant physico-chemical and antioxidant characteristics of fruits were determined for fifteen promising walnut (Juglans regia L.) selections (named ‘G-1’ to ‘G-15’) propagated from seeds. The well-known Turkish walnut cultivar ‘Sebin’ was included in the analysis as a standard in order to make comparison with seed propagated genotypes. The average fruit weight and kernel ratios ranged from 7.43 to 12.61 g and 45.10 to 57.83% among the studied genotypes, respectively. The chemical analyses showed that protein, crude oil, ash, carbohydrate and dietary fiber contents of the analyzed walnut genotypes were between 11.09-18.16%, 55.38-65.15%, 1.61-2.08%, 12.01-17.89% and 2.90-4.12%, respectively. Total phenolic content was found between 1,107-1,876 mg GAE/100 g among the genotypes and most of them had higher phenolic content compared with cv. ‘Sebin’. The total tocopherols content ranged from 30.0 to 44.4 mg/100 g of the extracted oil. The most common tocopherol in all samples was γ-tocopherol. The results obtained in the hereby study indicated that the seed propagated walnut trees can be very diverse and their nuts have a good potential for valuable sources of phytochemicals.


Full Text:

PDF


DOI: http://dx.doi.org/10.15835/nbha44210304

News (June 1, 2017): Notulae Botanicae Horti Agrobotanici Cluj-Napoca in CiteScore rank (Scopus – Elsevier) 28/66 in Horticulture
 
http://not-bot-horti-agrobo.blogspot.com/
https://www.facebook.com/NotBotHA
https://twitter.com/NotBotHA