林木种子园简称种子园，是由选择的优良无性系或家系组成的人工林，须采取隔离措施和集约经营措施，以杜绝或减少外界花粉的污染，保证高产、稳产和便于种子采集。它比母树林更能生产遗传品质和播种品质兼优的林木种子。
要实现这个目标，最便捷、可靠的途径是生产与其相适应的林木良种，营建林木种子园是生产良种的最佳途径。
The most convenient and reliable channel is produce the suitable fine breed of timber to realize that target, while the best way to produce the fine breed is to build the seed garden of timber.
在美国的一些林木育种项目中，育种群已用来控制种子园的近交、捕获最大的遗传增益的有效措施。
Breeding groups are being used to control inbreeding in a breeding population and to effectively achieve maximum genetic gains in some tree improvement programs of the United States.
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