A study on total phenolics and vitamin C contents of Kalecik Karasi (Vitis vinifera L.) clones
2016
Keskin, N. (Yuzuncu Yil Univ., Van (Turkey). Dept. of Horticulture) | Celik, H. (Ankara Univ., Ankara (Turkey). Dept. of Horticulture) | Kunter, B. (Ankara Univ., Ankara (Turkey). Dept. of Horticulture) | Keskin, S. (Yuzuncu Yil Univ., Van (Turkey). Dept. of Biostatistics)
In this study total phenolic and vitamin C contents of the fully ripe berries of 23 clones of Kalecik Karasi which is one of the leading Turkish local red-wine grape cultivar originally grown in Kizilirmak valley near Kalecik/Ankara region were examined under the clone selection project supported by TUBITAK (Project Nr: 107 O 731). High-pressure liquid chromatography (HPLC) was used for vitamin C and spectrophotometer for total phenolics estimation. One way ANOVA was used to compare means of clone for their total phenolic and vitamin C contents. In addition to this univariate method, hierarchical cluster analysis was performed to identify similarity levels among the clones by considering total phenolics and vitamin C content together. Differences among the clones were found statistically significant for both characteristics. Total phenolic contents of the clones varied from 3.310 mg (clone 21) to 3.389 mg (clone 6) as GAE g fw. Vitamin C content ranged from 14.010 mg (clone 6) to 16.500 mg (clone 19) in 100g fw. Furthermore, similarity level for all clones was 83.1% that means variation rate is about 17% among the clones. As a summary of whole data, the first three performing clones are 6 (3.389 mg), 10 (3.374 mg) and 1 (3.365 mg) for total phenolics, and 19 (16.500 mg), 9 (16.020 mg), and 21 (16.015 mg) for vitamin C contents of the berries.
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