长白落叶松种子园亲本生长与结实性状综合评价

生长与结实性状是种子园亲本重要的评价标准，本研究以长白落叶松种子园58个亲本无性系为试验材料，对其生长与结实性状进行测定及分析。方差分析结果表明，除通直度、节间距、0和1.3 m树皮厚度外，各性状在无性系间均存在显著差异，其表型变异系数变化范围为8.05%~54.97%，重复力变化范围为0.102 3~0.744 2。高变异、高重复力有利于优良无性系选育。利用主成分分析将各性状分为4个主成分（Y1、Y2、Y3、Y4），不同无性系各主成分值差异较大。以生长与结实性状为评价指标，利用多性状综合评价法，以10%的入选率，L59、L56、L77、L90、L92和L87等6个选为优良无性系，其主成分Y1值均较大，树高、胸径和材积的平均遗传增益分别为15.43%、8.25%和29.73%。本研究可为长白落叶松无性系种子园优良亲本建园材料选择提供理论基础。

Comprehensive Evaluation of Growth and Fruit Traits of Larix olgensis Parents in Seed Orchard

Growth and fruit traits were important evaluation criterion for tree parents in seed orchard. With 58 Larix olgensis parents clones, we studied the growth and fruit traits. By ANOVA analysis of all traits(except stem straightness, internodal distance, 0m and 1.3m bark thickness), there was significant difference among all clones. The phenotypic variation coefficients and repeatabilities ranged in 8.05%-54.97% and 0.102 3-0.744 2, respectively. Higher phenotypic variation coefficient and repeatability values were benefit for excellent clone selected and valuated. By principle component analysis, all traits were divided into four principle components(Y1, Y2, Y3 and Y4), and different clones showed different principle components values. Six clones(L59, L56, L77, L90, L92 and L87) were selected as excellent clones under a selection rate of 10%, using growth traits and fruit traits as comprehensive evaluation indexes. The selected clones showed higher Y1 principle component values with the genetic gains of 15.43%, 8.25%, and 29.73% for tree height, diameter at breath height and value, respectively.