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建立林木种子园的目的是大量生产那些性状上得到遗传改良的种子——林木良种。任何生物(包括作物和树木)的改良都不可能在一个世代内达到预期目的,育种工作通常
The purpose of setting up a tree seed orchard is to mass produce seeds that are genetically modified for traits - tree seed. Any improvement of any living things, including crops and trees, can not achieve its intended purpose for a single generation, and breeding work usually