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一、分级方法和《种植者通报》162期公布的分级方法一样,现叙述如下:(一)常规种植材料Ⅰ级:指大规模种植的材料.这类材料无性系的产量是从试验中得到的,并不需要用大田产量核实,原因是过去的研究证明:试验产量与大田产量极相近.Ⅱ级:指中等规模种流的材料,并有希望上升为Ⅰ级种植材料.这类种植材料大多数是最近选出来的.没有Ⅰ级种植材料研究资料那样完善,因而只能限制在一定范围的地区推荐使用.
First, the grading method is the same as the grading method published in “Bulletin of Grower Bulletin” 162, and is described as follows: (I) Conventional planting material Grade I: refers to large-scale planting materials. The clonal yield of such materials is obtained from the experiment Does not need to be verified by field production because past studies have demonstrated that the test yields are very similar to field production Grade II: refers to materials of medium size and is expected to rise to Grade I planting material Most of them were recently selected and there is no complete class I study of planting materials and thus can only be recommended for use in a limited area.