甘蔗是多倍体植物,遗传性复杂,其主要经济性状如蔗糖分、产量等属数量遗传,受微效多基因控制,起累加效应,受环境影响也大;有利基因与不利基因在染色体上的位点,常是相连或相邻,形成连锁群,很难甚至完全不能分离;染色体配对不规则,有双价体、单价体,也有三价体。因此,很难利 Sugarcane is a polyploid plant, genetic complexity, the main economic traits such as sucrose, yield and other genetically inherited, controlled by the micro-multi-gene, cumulative effect, affected by the environment is also large; favorable and unfavorable genes in the chromosome Of the sites, often linked or adjacent to form a linkage group, it is difficult or impossible to separate; chromosomal pairing irregular, with bivalent, monovalent, but also trivalent. Therefore, it is very difficult