油松天然优良林分遗传参数的估算和再选择

Estimate on Heredity Parameters and Reselection of Natural Superior Stands

本文通过对油松天然优良林分陕西省宁陕县十八丈沟试点８年生子代测定材料的统计分析来估算其遗传参数，并根据子代树高、地径、冠幅、当年高和轮枝数５性状的综合选择指数，对油松天然优良林分再次作出评价和选择。结果以５０％的入选率选出２０个遗传品质较好的优良林分。

Based on genotype selection and offsprings identification,the heredity parameters were estimated by analyzing the data of offsprings identification in natural superior stands of Chinese pine. The natural superior stands were appraised and selected in terms of synthetic selection index of offsprings′ height,grounddiameter,crownwidth,height growth of latest year and branch numbers of a whirl. Twenty superior stands in heredity nature were selected on 50% selection rate which has established reliable basis for the management of seed-stands.