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1.良种是指具有优良遗传品质和优良经济性状的农林作物(种子)。林木良种是实现林木速生、丰产、优质的一个内因。 2.种(物种) 是进化过程中的产物。同一个种都有相似的性状和遗传特性。 3.品种具有一定的经济价值,遗传性比较一致的一种类型,经人门选择培育而得,能适应一定的自然和栽培条件,在产量和品质上符合人民的要求。 4.品系品种内的一种类型。遗传性状较稳定一致而起源于共同祖先的一群个体。与同一品种的其它品系是经常不同的。它们可认为是还没有达到育成品种标准的原始材料。
1. Good seed refers to the agricultural and forestry crops (seeds) with excellent genetic quality and good economic traits. Forest seed is to achieve fast-growing trees, high yield, an internal quality. Species (species) are the product of evolution. The same species has similar traits and genetic traits. 3. Varieties have a certain economic value, a more hereditary type, chosen by the door to nurture, to adapt to certain natural and cultural conditions, in terms of yield and quality to meet people’s requirements. 4. A variety of varieties within the type. A group of individuals whose genetic traits are more consistent and originated from a common ancestor. And other strains of the same variety are often different. They can be considered as raw materials that have not yet reached the standard of bred varieties.