竹柏优良单株选择及相关性状研究

对8个种实产量高的竹柏植株的种子含油率测定及抗寒性鉴定结果表明：以单位面积种实产量为主要指标选择的竹柏优良单株间，在种子含油率、抗寒性等方面存在着极显著差异；竹柏种子含油率与主要气候因子、种实产量、土壤主要养分无明显相关，表现出较高的遗传效应；竹柏单位面积种实产量与前一年的降水量、抗寒性与经纬度均有一定的相关性．通过方差分析、相关分析和聚类分析，对各初选植株的种实产量、种子含油率，以及抗寒性分析比较，从初选的8个植株中选出种子油产量高、较耐寒的NY2，NS12个优良单株．

Study on Superior Individual Selection of Podocarpus nagi and Corresponding Characteristics

A comparative study on the relationship between the seed oil content and cold resistance of 8 superior individuals of Podocarpus nag/was conducted. The results showed： There were significant differences in seed oil content, cold resistant capacity and other indexes among the superior individuals selected by unit seed output as the principal index. Seed oil content of P. nag/showed high genetic effect, but is was not significant- ly correlated to the major climatic factors, seed output and the contents of main nutrients in the soil. The unit seed output was correlated to precipitation of the last year, cold resistance, latitude and longitude. NY2 and NS1 were screened out to be the best superior individuals from the eight candidates according to the comparative analyses on seed output, seed oil content and cold resistance by integration of variance analysis, correlation analysis and clustering analysis methods.