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檫树是我国南方主要的珍贵速生树种之一。建立无性系种子园,生产遗传品质优良的种子,是提高檫树人工林生产力的重要途径。由于各无性系均是从自由授粉的群体中选择的单株,遗传差异较大。因此,在种子园内环境条件一致的情况下产生不同的表现型,一部分无性系对早春寒流间歇性的侵袭比较敏感,致使已开放的花凋谢死亡,不能正常结实,这是影响种子园稳产高产形成大小年的一个重要原
Sassafras tree is one of the major precious fast-growing tree species in southern China. Establishing a clonal seed orchard and producing seeds with good genetic quality is an important way to improve the productivity of the Sassafras tree plantation. As each clonal is a plant selected from a freely pollinated population, the genetic variation is greater. Therefore, different environmental phenotypes were produced in the seed orchard. Some clones were more sensitive to the intermittent invasion of early spring cold current, which led to the death of the open flower which could not be normal and robust, which affected the stable and high yield of seed orchard The formation of an important year of the original size