Higgins Linden E, Rankin Mary Ann
Department of Zoology, University of Texas, Austin, TX, 78712.
Centro de Ecología, Universidad Nacional Autonoma de México, Ciudad Universitaria Apado., Post. 70-275, México, D.F. México.
Evolution. 1996 Apr;50(2):573-582. doi: 10.1111/j.1558-5646.1996.tb03869.x.
To investigate the consequences of canalization and plasticity in arthropod developmental pathways, we developed a model that predicts eight possible combinations among three larval developmental parameters. From the descriptions of insect and spider postembryonic development, it is apparent that not all aspects of juvenile development are plastic and that species differ in which traits are plastic. Most strikingly, only four of the possible eight combinations of canalized and plastic parameters have been found in nature. Using this model, we show that the identity of the canalized developmental parameters and the degree of genetic variation in the value at which a given parameter is fixed have important implications for the ecology and evolution of complex life cycles.
为了研究节肢动物发育途径中发育稳态和可塑性的后果，我们开发了一个模型，该模型预测了三个幼虫发育参数之间的八种可能组合。从昆虫和蜘蛛胚后发育的描述中可以明显看出，并非幼虫发育的所有方面都是可塑的，而且不同物种在哪些性状是可塑的方面存在差异。最引人注目的是，在自然界中只发现了发育稳态和可塑性参数的八种可能组合中的四种。利用这个模型，我们表明，发育稳态的发育参数的特性以及给定参数固定时其值的遗传变异程度对复杂生命周期的生态学和进化具有重要意义。
