论文部分内容阅读
在１３个不同种源的８０个家系苗期和５年生幼林调查的基础上，观测了不同产地种子性状；苗木高生长、分枝、根系性状、生物量；幼林生长变异以及生长适应性等规律。结果表明，幼林表现贵州雷山、榕江、剑河种源树高大于云南、湖北种源，其中好的大于差的２５．９％。秃杉种源群体间性状存在明显的遗传差异，群体变异中的树高生长量随经度增大而加大，性状变异与产地经向相关有强于纬向相关的趋势，地理变异倾向于不连续遗传变异类型，以经向为主的渐变。据此将秃杉分布区种源划分为３个种源区，２个亚区。
Based on the survey of seedlings and five-year-old seedlings of 80 families from 13 different provenances, the seed traits of different habitats were observed. The growth, branching, root traits and biomass of seedlings were observed. The growth variation and growth adaptability of young seedlings . The results showed that the provenances of young forest in Leishan, Rongjiang and Jianhe provenances in Guizhou Province were significantly higher than that of Yunnan and Hubei provenances, with the good being greater than 25.9% of the difference. There was a significant genetic difference among the provenances of Taiwania flousiana. The tree height growth in the population variation increased with the increase of longitude, and the correlation between the variation of characters and the provenance of the provenance tended to be stronger than that of the latitudinal. The geographical variation tended not to Continuous genetic variation type, mainly by the direction of the gradient. According to this, the provenance of Taiwania flousiana was divided into 3 provenance areas and 2 sub-areas.