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林木良种化是提高森林生产力的重要途径。从本世纪50年代以来,各国对选用良种,实现林木栽培良种化的工作,已正式提到日程。我国从杨树、桉树、杉木、泡桐、池柏、油茶等树种中,已选育出一大批优良品种,从油松、红松、落叶松、刺槐、榆树中选育了一些优良单株或类型,建立了大面积良种基地。林木育种工作呈现出了可喜局面。为普及林木育种知识,这里先向大家介绍一些基本概念,以后将陆续介绍有关实现林木良种化的程序和途径等林木育种基础知识,供参考。一、一些基本概念 1、类型: 任何一个活体,在其繁殖过程中,都表现出性状的遗传和性状的变异二种相对立的
Improved tree forest is an important way to improve forest productivity. Since the 1950s, various countries have formally referred to the agenda for the selection of improved varieties for planting and planting of trees. A large number of excellent varieties have been bred from poplar, eucalyptus, fir, paulownia, cypress, camellia and other tree species, and some elite individuals have been bred from Pinus tabulaeformis, Korean pine, larch, acacia and elm Type, established a large area breeding base. Forest breeding has shown a welcome situation. To popularize forest breeding knowledge, here to introduce some basic concepts, will be introduced one after another on the realization of forest seed improvement procedures and ways of forest breeding, such as the basic knowledge for reference. First, some basic concepts 1, type: any living body, in the process of its reproduction, both showed genetic traits and traits of variation of two opposite