油松种子园无性系自由授粉子代测定与种子批稳定性分析

Open Pollinated Progeny Test and Stability Analysis of Seedlot from Clonal Seed Orchard of Pinus tabuliformis

基于辽宁兴城油松种子园相似立地条件下的多年度自由授粉子代测定材料,分析了油松种子园无性系自由授粉子代的遗传差异及其在年度种子批中表现的稳定性,探索了对稳定性变异的影响因子。结果表明:在油松种子园结实初期,无性系作为母本的一般配合力效应在种子批的遗传构成中起重要作用;兴城油松种子园中的绝大多数无性系具有优良的生长表现,现有种子园的去劣疏伐、子代林改建实生苗种子园以及配合选择第二代优树都具有较大的潜力;油松种子园花粉背景和植株生长的综合环境因子对无性系的遗传和表现有一定的影响,根据其稳定性差异可采取不同利用方式。

Based on many years of open pollinated progeny（OPP） test under similar site conditions in seed orchard of Pinus tabuliformis in Xingcheng,Liaoning Province,China,genetic variations of OPPs and their stabilities in annual seed lots,as well as the factors affecting the stability of OPPs were examined.The results showed that in the early flowering stage,general combining ability of the clone as the female parent played an important role in the genetic composition of seed lots;most clones in seed orchard of P.tabuliformis in Xingcheng were superior to those in natural stands.Management measures such as thinning in existing clones of seed orchard,rebuilding seedling seed orchard in progeny test forest,and selecting second-generation superior tree had great potentialities to get high genetic gains.Pollen background and comprehensive environment factors related to individual growth had certain influences on the genetic performance of the clones in seed orchard.According to the stability differences,clones and their progenies families could be used differently.