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In order to select and cultivate germplasm resources of Leymus chinensis suitable for planting in Hinggan League area, four wild Leymus chinensis germplasm resources from different geographical distribution in Hinggan League were tested for phenological characteristics, morphological indexes, quantitative indexes and nutritional indexes, and correlation analysis and comprehensive evaluation were carried out. The results showed that both morphological and quantitative traits had different degrees of variation, ranging from 2.11%~43.10%. Among the nutritional indexes, the coefficient of variation of dry matter is the smallest, which is 0.26%. The coefficient of variation of crude protein is the highest, which is 20.94%. There was a significant positive correlation between plant height and leaf width (P<0.05) and extremely significant positive correlation with dry weight (P<0.01). The ranking of weighted correlation degree was YC01> YC02>YC04>YC03. The study indicates that YC01 germplasm has good production performance and comprehensive performance in Hinggan League. [ABSTRACT FROM AUTHOR]

Objective: To study the flavonoids of Erigeron canadensis., Method: The constituents of EtOH extraction from the whole plant of E. canadensis were isolated and purified by repeated column chromatography. These compounds were identified by their physical and spectral data., Result: Twelve flavonoids were isolated and identified as quercetin-7-O-beta-D-galactopyranoside(1),quercetin(2), luteolin(3), apigenin(4),5,7,4'-trihydroxy-3'-methoxy flavone(5), quercetin-3-alpha-rhamnopyranoside(6), quercetin-3-O-beta-D-glucopyranoside(7), apigenin-7-O-beta-D-glucopyranoside(8), luteolin-7-O-beta-D-glucuronide methyl ester(9),4'-hydroxy baicalein-7-O-beta-D-glucopyranoside(10),baicalein(11),rutin(12)., Conclusion: Compound 1 was isolated from the Compositae family for the first time. Compound 5 and 9 were firstly isolated from the genus Erigeron. Compound 3,4,7,8 and 11 were isolated from E. canadensis for the first time.

Objective: To investigate the chemical constituents of the aerial part of Erigeron acer., Methods: The chemical constituents were isolated by various columns and thin layer chromatographic methods. The structures were identified by spectral data., Results: Five compounds were isolated and identified as alpha-amyrin (1), beta-amyrin (2), caffeic acid (3), quercetin (4), 4'-hydroxywogonin-7-O-beta-D-glucuronic acid glycoside (5)., Conclusion: The five compounds are obtained from this plant for the first time. The signals of 13C-NMR of the compound(5) are reassigned by means of DEPT, HMQC, HMBC, the signals of 1H-NMR of 2" - 5"-H of the glucuronic acid moiety are assigned by means of HMBC, HMQC, 1H-1H COSY for the first time.