北京林业大学学报2012，Vol.34Issue(5)：15-24,10.
高山松与亲本种多种群在高海拔生境下的苗期适应性研究
Seedling adaptation of hybrid pine Pinus densata and its parental species in the high elevation habitat
摘要
Abstract
In order to test whether P. densata was more fit in its own high-elevation niche than its parental species ( P. tabuliformis and P. yunnanensis) and describe their adaptative characteristics in the seedling stage,we conducted a comparative analysis of the seedling adaptative characters in three species. The results showed that most of traits in the seedling stage were significantly different among species and populations,and large amount of variance was identified among species or among populations. The survival rate and the rate of bud-set in October were the best indicators of among-species divergence. The hybrid pine P. densata appeared to be intermediate between P. tabuliformis and P. yunnanensis in most of traits in the early stage. Compared with P. yunnanensis,P. densata had higher germination rate and survival rate,which were lower than P. tabuliformis,and the bud-set date was 30 days later than P. tabuliformis. The hybrid pine P. densata expressed transgression in four traits of seedling height,the ratios of the red seedlings,the purple seedlings and seedlings of secondary growth,which would reflect its unique adaptation in the high-elevation niche. P. tabuliformis was the highest in rates of bud-set andseedling survival. P. yunnanensis was lowest in seedling survival and only the two-year-old seedlings had signal of bud-set. P. densata had a longer growing season than P. tabuliformis,and stronger adaptation than P. yunnanensis. That could be one of the reasons about P. densata to become a hybrid in the highelvation habitat.关键词
高山松/油松/云南松/苗期适应性Key words
Pinus densata/P. tabuliformis/P. yunnanensis/seedling adaptation分类
农业科技引用本文复制引用
张立沙,代剑峰,高琼,刘灏,张华,赵伟,毛建丰,李悦..高山松与亲本种多种群在高海拔生境下的苗期适应性研究[J].北京林业大学学报,2012,34(5):15-24,10.基金项目
国家自然科学基金项目（C161001）. （）
