细胞中的染色体是主要遗传物质基础,它的结构和数目的变化,必然导致生物体遗传性变异。因此,植物细胞染色体数目的变异与育种实践的关系至为密切。下面对于植物染色体的倍性和数目的变异以及多倍体育种作扼要的介绍。 Chromosomes in cells are the basis of the major genetic material, its structure and the number of changes will inevitably lead to genetic variation in organisms. Therefore, the relationship between plant cell chromosome number variation and breeding practice is very close. Below for the plant chromosome ploidy and the number of variations and polyploid breeding for a brief introduction.