一、目的和意义遗传学和农林业生产实践的大量事实证明,从混杂的群体中选择优良的单株,进行无性系侧验,然后再选择其中的优良无性系造林,可以获得目前科学水平下最大的遗传增益.因此,在目前,除建立无性系种子园以期在将来生产遗传品质优良的种苗外,研究池杉优良无性系选种的可能性和技术具有十分重要的意义.然而我国池杉大树为数甚 First, the purpose and significance A large number of genetics and practice of agriculture and forestry production proved that from the mixed groups to select good single plant, clonal side inspection, and then choose one of the excellent clonal afforestation, you can get the current scientific level Maximum genetic gain.Therefore, at present, in addition to the establishment of clonal seed orchard in the future to produce high quality genetic seedlings, the study of the possibility and technology of excellent clonal selection of Ipomoea japonica is of great significance.However, our pool A large number of fir trees