The result also made us sure that water was the most important factor among all that influence the ecotype differentiation among different geographic populations of Leymus chinensis.

• 此结果与对羊草的水分胁迫下游离脯氨酸含量变化的聚类图较相近，从而进一步证实水分是影响羊草种群间遗传变异和生态型分化的一个最主要的因子。