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| Analysis of main economic indexes and fatty acid composition of 14 walnut cultivars in Liangshan Prefecture |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230368 |
| KeyWord:Liangshan Prefecture walnut cultivar economic index fatty acid |
| FundProject:四川省林业和草原局省级财政专项资金（2022CZZZ13）；四川省科技计划项目（2023JDZH0009） |
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| Abstract: |
| In order to comprehensively evaluate and rationally utilize the existing walnut cultivars in Liangshan Prefecture, Sichuan Province, the main economic indexes and fatty acid composition of 14 walnut cultivars in Liangshan Prefecture were measured, the coefficient of variation and genetic diversity index of each index were calculated, and correlation analysis and cluster analysis were carried out for each index. The results showed that among the 14 walnut cultivars, the ones with higher crude fat content were Xiaoyuan, Meigu Dabao, Mianyang, etc., and the ones with higher protein content were Lujia, Xiangsu, Baihetan rice walnut, etc. Xiangsu was a special cultivar with high content of oleic acid, Lifeng Purple Pulp and Daliangshan Ziyi Walnut Late Maturity No. 2 had high content of linoleic acid, Yanyuanzao, Dongwan, Lifeng Purple Pulp had high content of α-linolenic acid. The ratio of linoleic acid content to α-linolenic acid content was close to 4 of Yanyuanzao, Dongwan and Xiaoyuan. The coefficient of variation of kernel yield, crude fat content and palmitic acid content (less than 10%) was low, indicating that these three indexes were stable. The genetic diversity index of the main economic indexes and fatty acid content of 14 walnut cultivars ranged from 1.57 to 2.14, in which the genetic diversity index of the kernel yield was the lowest, and the genetic diversity index of the heptadecanoic acid was the highest. There was a significant positive correlation between the mean value of three diameters and single fruit weight, a significant negative correlation between protein content and α-linolenic acid content, and a significant negative correlation between oleic acid content and linoleic acid content. By cluster analysis, 14 walnut cultivars were divided into 2 groups when Euclidean distance was 20, the Xiaoyuan and Xiangsu were clustered into one group, and the other 12 cultivars were clustered into one group. In conclusion, 14 walnut cultivars are all local excellent cultivars, and walnut cultivars with high fat content, high protein content, reasonable fatty acid ratio and other specific indicators can be utilized in a targeted manner. |
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