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对林木多世代群体改良,获取遗传增益和林分的生态稳定性是其目的,遗传多样性是其物质基础。随着育种世代的提高,常常是遗传增益越大,则遗传多样性失去就越多。在林木改良过程中,采用有效地隔离,保护和积累有益的突变体,采用适宜的选择方法,控制选育群体的大小,进行科学的交配设计等措施,可以对林木多世代群体的遗传增益和遗传多样性作合理地、必要地协调,以保证遗传多样性的充分利用和获得理想的长短期效益。
It is the purpose of improved multi-generation tree community, access to genetic gain and ecological stability of forest stand, and genetic diversity is its material basis. As breeding generations increase, often the greater the genetic gain, the more genetic diversity is lost. In the process of forest improvement, adopting measures such as effectively isolating, protecting and accumulating beneficial mutants, adopting appropriate selection methods, controlling the size of breeding populations, and designing scientific copulation, etc., Genetic diversity is reasonably and necessarily coordinated to ensure the full utilization of genetic diversity and the desired long-term and short-term benefits.