Gurevitch J
Department of Ecology and Evolution, State University of New York, Stony Brook 11794-5245.
Genetics. 1992 Feb;130(2):385-94. doi: 10.1093/genetics/130.2.385.
Achillea lanulosa has complex, highly dissected leaves that vary in shape and size along an altitudinal gradient. Plants from a high and an intermediate altitude population were clonally replicated and grown in a controlled environment at warm and cool conditions under bright light. There were genetic differences among populations and among individuals within populations in leaf size and shape. Heritabilities for leaf size and shape characters were moderate. Leaves of the lower altitude population were larger and differed from the higher altitude plants in both coarse and fine shape. Plastic response to temperature of the growth environment paralleled the genetic differentiation between low and high altitude populations. There was no apparent trade-off between genetic control over morphology and the capacity for directional plastic response to the environment. Differences in leaf dissection and size at contrasting altitudes in this species are the result of both genetic divergence among populations and of acclimative responses to local environments.
绵毛蓍具有复杂且高度分裂的叶子，其形状和大小沿海拔梯度变化。对来自高海拔和中海拔种群的植株进行克隆繁殖，并在可控环境中于明亮光照下的温暖和凉爽条件下种植。种群之间以及种群内个体之间在叶片大小和形状上存在遗传差异。叶片大小和形状特征的遗传力适中。低海拔种群的叶片较大，在粗略和精细形状上均与高海拔植株不同。生长环境温度的可塑性响应与低海拔和高海拔种群之间的遗传分化相似。在形态的遗传控制与对环境的定向可塑性响应能力之间没有明显的权衡。该物种在不同海拔高度的叶片分裂和大小差异是种群间遗传分歧以及对当地环境适应性响应的结果。
