The molecular marker is increasingly considered as a powerful tool to deal with these problems and widely practical in genetic analysis. Microsatellite, simple sequence repeats ( SSR ), has high homology, length polymorphism and codomain inheritance. 微卫星分子标记,又称简单重复序列标记有着高的多态性和同源性以及共显性遗传的特点,广泛应用于木本植物研究。