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对从加拿大引进的29个东部白松种源种子在辽宁清原进行了3年苗期试验。结果表明,东部白松生产力随纬度增高而加快,生长与纬度呈单向渐变地理模式。方差分析结果表明东部白松不同种源之间生长量存在显著差异,筛选的6个优良种源,苗高遗传力12%～27%,遗传增益9.3%～19%,直接引种这些优良种源造林可获得显著的增产效益。
Thirty-nine Eastern white pine seed sources introduced from Canada were subjected to a three-year seedling experiment in Qingyuan, Liaoning. The results showed that the productivity of Pinus bungeana increased with the increase of latitude, and the growth and latitude showed a one-way gradient geography pattern. Analysis of variance showed that there were significant differences in the growth of P. bungeana among different provenances. Six elite provenances with 12-9% heritability and genetic gain of 9.3% -19% were used to directly plant these elite provenances Significant yield gains can be achieved.