火炬松的引种试验及种源—家系选择研究

对火炬松 8个种源、 1 9个 1代种子园优良家系 ,以湿地松和马尾松为对照在洋口林场进行引种栽培试验 ,结果表明 :火炬松的生长效果优于湿地松、马尾松 ;火炬松各种源、家系间在树高、胸径、材积和冠幅等调查性状上有着极显著的差异 ;家系各生长性状的相关性较强 ,遗传变异系数较大 ,家系的遗传力较高 .通过对参试种源、家系主成分值的综合评定和聚类分析 ,选出了 1个极优种源 ,4个较优种源和 3个极优良速生家系 ,8个较速生家系 ,与材积较高的对照树种湿地松相比 ,2类优良家系的材积遗传增益分别为 1 9.0 2 %和 6.86% .

Study on Trial of Introduction and the Selection of Provenance and Family for Loblolly Pine

Compared with slash pine and mason pine,the trial of introduction of 8 provenances and 19 families from the first generation seed orchard for loblolly pine was conducted at yangkou forest farm The result showed that the growth effect of loblolly pine was the best There were significant differences in height?breast height diameter?crown diameter and volume among provenances and families The genetic parameter and the correlation analysis indicated that there were great correlation between traits,the genetic variation coefficient was large and the heritability was quite high Through synthesis evaluation and cluster analysis on the value of the principal component,the best provenance was,four better provenances and three best fast growth families,seven better fast growth families were chosen,the genetic gains of volum of this two sorts of fine families were 19 02% and 6 86% respectively