【摘要】 于1988年在帽儿山实验林场林木改良实验站进行调查研究,对7年生樟子松优树半同胞家系测定林进行多性状的相关分析和方差分析,利用主分量指数对112个自由授粉半同胞家系进行选择,初步选出了优于最佳对照的29个优良家系和低于对照平均值的21个低劣家系。这种指数选择集中了多性状的信息,比单一性状选择具有优越性。结论表明优树家系的选择是有效的,可为建立一代生产性种子园和将试验林改建为实生苗种子园提供科学依据。更多还原

【Abstract】 Investigations and researches are carried out in Maoershan Forest Farm attached to Northeast Forestry University in 1988. Compared with the contrasts,29 fine families and 21 inferior families are selected from 11 families of half-sib and open pollinated of seven-year old scots pine stands by using multicharacters correlations analysis and variance analysis as well as principal component index selection. This index selection which collects multicharacters information has more advantage than monocharacter selection. It is very important to select fine families for building the first generation seed orchard and changing from trial stand to seedling orchard.更多还原