湖北省引种原生种源和次生种源日本落叶松生长比较研究

以湖北省从国内引种的日本落叶松次生种源和从日本引种的原生种源材料为对象,利用7a生生长数据对这两部分材料在湖北省的生长情况进行了比较研究。结果表明:原生种源的胸径、树高生长分别是次生种源的1.8、1.6倍,次生种源和原生种源内各种源间胸径和树高的生长差异均达到显著或极显著水平;原生种源比次生种源具有更高的遗传变异性,通过选择获得的遗传增益分别是次生种源的4.75和2.38倍。

Comparison Study on Growth to Primary and Secondary Provenance of Larix Kaempferi Introduced in Hubei Province

Comparison study on growth for material as object with primary and secondary provenances of Larix Kaempferi introduced both form national and Japan respectively were done with 7 years-old growth data of DBH and height in Hubei Province. The result showed that the growth of DBH and height in primary provenance were 1,8 and 1.6 times of secondary provenance. Compared with secondary provenance, primary provenance had higher genetic variation although there exist significant or very significant difference among the families both from primary and secondary provenances. The genetic gains of DBH and height through selection were 4.75 and 2.38 times of secondary provenance respectively.