引种火炬松家系的速生性和稳定性综合分析

以湿地松和马尾松为对照,对福建省引种的5年生火炬松家系生长情况进行调查分析,结果表明,引种火炬松的树高、胸径和材积的家系方差及家系与地点互作方差均达显著水平,火炬松家系在福建省的平均生长表现优于马尾松和湿地松。利用系统聚类法可将测试的25个火炬松家系分为速生、较速生、中等和较差4类,其相对于当地树种马尾松的实际增益分别为83.2%、63.4%、48.5%和33.7%。运用基因型分组法对火炬松家系的速生性和稳定性进行综合评价,最终确定19、25、18、21、10号家系为增产且变异小,具有理想基因型的稳定型家系。

Early evaluation on fast-growth and stability of introduced Pinus taeda families

In comparison with slash pine, which was introduced earlier from abroad, and the native mason pine, the five-year-old loblolly pine (Pinus taeda) families, which was introduced into Fujian Province, were evaluated. The results indicated that there were significant or great significant differences in families, gene and site mutual variance. Loblolly pine grew more quickly than slash pine and mason pine. By synthesizing clustering analysis, 25 loblolly pine families were divided into 4 groups, i. e. best, better, moderate and poor. Compared to mason pine, the actual gains of loblolly pine families were 83.2%, 63.4%, 48.5% and 33.7%, respectively. Using gene grouping means to evaluate the fast-growth and stability of loblolly pine families, No. 19, 25, 18, 21 and 10 families had superior gene type, which grew fast and varied little.