51个红松子代家系苗期生长变异研究

为选育生长快、成活率高的优良红松子代家系，以吉林省龙井市开山屯林场的51个红松初级种子园子代家系为材料，对其苗高、地径、成活率及存活率进行测定分析。结果表明：除4年生地径的区组与家系交互作用外，各性状在家系间均达显著差异水平（P<0.05）；各性状表型变异系数变化范围为6.85%～29.89%；各性状的遗传力较高，除4年生地径（0.34）和存活率（0.37）外，遗传力均超过0.50，属于高遗传力；高变异系数，高遗传力，有利于家系的评价选择；相关性分析结果表明，各性状间相关关系均达极显著正相关水平。利用布雷津多性状综合评价法对51个红松子代家系进行评价，以10%的入选率，PK29、PK38、PK21、PK37和PK48五个家系入选。入选家系4年生苗高和地径平均值分别为29.26和0.93 cm，分别比总平均值高3.51和0.06 cm，遗传增益分别为10.08%和2.33%。本研究可以为红松优良家系评价提供理论基础和材料。

Variance Analysis of Growth Traits of 51 Pinus koraiensis Seedling Families

In order to obtain faster growth and high survival rate Pinus koraensis offspring families, with 51 P.koraensis families in Kaishantun Forest Farm in Longjing City, Jilin Province as materials, and studied their growth traits(seedling height and ground diameter), rate of survival and preserving rate. By analysis of variance, the traits were significantly different(P<0.05) among different families except rate of survival at block-family interaction. The coefficients of phenotypic variation of all the traits ranged from 6.85%-29.89%. The heritabilities of different traits ranged from 0.51 to 0.80 except for the ground diameter in 4 a seedlings and rate of survival, and other traits showed their higher heritability. High variation and heritability values were beneficial to evaluation and selection of excellent families. Correlation analysis results showed that there were significantly positive correlations among all the traits. Using the method of multiple-traits evaluation, with a selection rate of 10%, family PK29, PK38, PK21, PK37 and PK48 were selected as elite families, and the genetic gains of seedling height and ground diameter were 10.08%-2.33%, respectively. The study can provide theoretical basis for evaluating Pinus koraiensis.