一、前言在樟子松的林木改良工作中,对优良单株做表现型测定占有很重要的地位。就其方法来说,当前不外两种:通过有性方式测定的,称为子代测定;通过无性方式测定的,称为无性系测定。后一种测定,一般认为能早出成果,并可做为及早淘汰不良亲本,从 First, the foreword Pinus sylvestris forest improvement work, the performance of phenotypic determination of an excellent single plant occupies a very important position. As far as its method is concerned, there are currently no more than two measures: sexual determinations, called progeny determinations, and asexual determinations, called clonal determinations. The latter measure, generally considered early results, and can be used as an early elimination of unhealthy parents, from