Variations of Seedling Growth and Medicinal Components Contents in Leaves of Ginkgo biloba from Different Provenances in Common Garden

The Common garden experiment of Ginkgo biloba from different provenances was carried out to reveal the influence of environment on different provenances of Ginkgo biloba, so as to provide basis for breeding the provenances and varieties of Ginkgo biloba with high medicinal value. In this study, four ginkgo seeds from different provenances in Sichuan were collected, and after being cultivated in common garden, the seedling growth and the content of medicinal components in leaves were measured and analyzed, and the correlation analysis of the results was carried out. The results were as follows: (1) There were significant differences in the transverse diameter, vertical diameter and 100-seed weight from different provenance (P<0.01), and Kaijiang were the largest. (2) There were significant differences in seedling height, leaf number per plant, individual leaf weight and leaf weight per plant from different provenances (P<0.01), and significant differences in crown width (P=0.02). Among them, seedling height, leaf number per plant, leaf weight per plant and crown width are the largest, and single leaf weight is the largest. (3) There were significant differences (P<0.01) in the contents of terpene lactones and ginkgolides in leaves from various sources, and significant differences in the contents of flavonoids, Ginkgolides A and Ginkgolides B (P=0.02, P=0.03, P=0.01). Among them, the content of flavonoids is the highest in Cangxi, and the contents of terpenoids, ginkgolides, Ginkgolides A and Ginkgolides B are the highest in Luding. (4) Seedling height was positively correlated with the individual leaf weight (r=0.912). Terpene lactones were positively correlated with the content of bilobalide and Ginkgolide B (r=0.928, 0.962). The results showed that Ginkgo biloba from different provenances had significant differences in the growth of offspring seedlings and the content of medicinal components after cultivation in common garden, which was due to the long-term influence of parents of the environment of the provenance.