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| Economic characters and fatty acid composition of wild Camellia oleifera in Yaan, Sichuan |
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| KeyWord:wild Camellia oleifera economic character fatty acid composition principal component analysis |
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| Abstract: |
| In order to screen the special germplasm resources of Camellia oleifera in Ya’an, Sichuan province, the fruit characters, economic characters, and the oil fatty acid composition of 22 wild C.oleifera (TQYS1-TQYS22) fruits collected from Tianquan, Ya’an, Sichuan province were determined, and their general qualities were evaluated by principal component analysis (PCA). The results showed that there were significant differences in fruit characters, economic characters, and fatty acid composition among 22 wild C. oleifera resources. Among fruit characters, the weight of fresh fruit ranged from 9.14-43.58 g, and possessed the highest variation coefficient (41.75%), the variation coefficient of fruit height was the smallest, only 10.83%. Among the main economic characters, the variation coefficient of fresh fruit oil content was the largest, reaching 31.99%. The yield of fresh seed was 27.54%-59.46%, the yield of dry seed was 15.02%-45.03%, and the kernel oil content ranged from 3905% to 56.60%, and seven wild C. oleifera met the national standards for selection of superior trees of C.oleifera. The main fatty acids in wild C. oleifera seed oil was oleic acid, linoleic acid, palmitic acid and stearic acid, the content of saturated fatty acid was 6.53%-10.27%, and the content of unsaturated fatty acid was 89.73%-93.47%. Four wild plants (TQYS17, TQYS21,TQYS18 and TQYS20) with the best comprehensive characters were selected by principal component analysis, and they had high fresh seed yield, dry seed yield, kernel and fresh seed oil content. There were abundant genetic resources in wild C.oleifera, which could provide good germplasm resources for fine variety breeding in Ya’an, Sichuan. |
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