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| Screening and comprehensive evaluation of excellent germplasm resources of Aleurites montana |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230318 |
| KeyWord:Aleurites montana germplasm resource comprehensive evaluation excellent varieties α-eleostearic acid |
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| Abstract: |
| Aiming to provide a scientific basis for the seeding of A. montana industry， 29 excellent maternal plants of A. montana selected as the experimental subjects,the plants phenotypic traits（tree height, crown width and diameter at breast height）, fruit phenotypic traits(30 fresh fruit mass, 30 dry fruit mass, total mass of fresh fruits per plant and kernel yield of dry seeds), and oil traits(oil content of dry kernel, oleic acid , linoleic acid, α-eleostearic acid and α-eleostearic acid/β-eleostearic acid) of A. montana were determined.Correlation analysis, cluster analysis and principal component analysis were also carried out for each trait index to analyze and select the excellent germplasm resources. The results showed that the coefficient of variation for 12 traits of 29 A. montana ranged from 10.82% to 4584% with the maximum variation in total mass of fresh fruits per plant.The genetic diversity index was between 1.46 and 1.97. Correlation analysis showed that 30 fresh fruit mass was significantly and positively correlated with tree height and crown width, total mass of fresh fruits per plant was highly significantly and positively correlated with diameter at breast height, the oil content of dry kernel was significantly and positively correlated with the kernel yield of dry seeds, and highly significantly and positively correlated with total mass of fresh fruits per plant, oleic acid was significantly and positively correlated with linoleic acid, and α-eleostearic acid was highly significantly and negatively correlated with oleic acid, and highly significantly and positively correlated with α-eleostearic acid/β-eleostearic acid. The excellent maternal plants of A. montana could be divided into three groups by cluster analysis,and the germplasm in group Ⅱ had the potential to screen for tree dwarfing, high yield, and high oil content varieties. AF-7 and YZQ-6 were selected as the optimal maternal plants by principal component analysis of comprehensive and economic indicators. In summary, A comprehensive evaluation system for A. montana germplasm resource is preliminarily constructed, and AF-7 and YZQ-6 can be used as the maternal plants for the future selection of excellent varieties of A. montana. |
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