“second generation clonal seed orchard”的概念、定义、翻译、参考文献-科学参考

单词	second generation clonal seed orchard
释义	second generation clonal seed orchard Encyclopedia 农学种子生产区释 second generation clonal seed orchard第二代无性系种子园第一代遗传改良材料经过一轮双亲子代（包括少量单亲子代）测定和配合力的选择，在优良组合的后代中选择优良个体，以及在部分未经选择的林分中补充的资源建立的种子园。
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