油松是我省山地造林的主要树种,近十多年来,采用表型选择的方法,先后已从遵化、平泉、承德、隆化、兴隆、围场等县和内蒙古的昭乌达盟地区选择优树450株,并利用其中部分优树营建初级种子园1,000多亩。为了进一步改善种子的遗传品质,提高选择育种的效果和开展多世代育种,我们开始了优树的子代测定工作。 Pinus tabulaeformis is the main tree species afforestation in our province. In the recent ten years, the method of phenotypic selection has been applied from Zunwe, Pingquan, Chengde, Longhua, Xinglong, Yard and other counties and Zhaowuda area in Inner Mongolia 450 trees were selected and some 1,000 mu of primary seed orchards were constructed using some of the trees. In order to further improve the genetic quality of seeds, improve the effect of selective breeding and carry out multi-generational breeding, we started the progeny determination of superior trees.