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1原种的来源1.1由育种家种子生产原种其优点是最能有效的保持原品种的特性。缺点是数量少,满足不了生产上的用种需要;利用的周期短,原因是最初的一批种子,不能被长时间利用。1.2采用“三圃制(株行圃、株系圃、原种圃)”或“两圃制(株行圃、原种圃)”生产原种主要农作物的“两三圃制”生产原种的操作程
1 The origin of the original 1.1 The original seed produced by the breeder seed has the advantage of being most effective in maintaining the characteristics of the original seed. The disadvantage is the small number, can not meet the production needs of species; the use of short cycle, because the first batch of seeds, can not be long-term use. 1.2 Adopting the system of “three nursery (nursery, nursery stock, original nursery)” or “two nursery (nursery stock and nursery stock)” and “two or three nurseries System ”production of the original species of operation