Monteiro A, Brakefield P M, French V
Institute of Evolutionary and Ecological Sciences, University of Leiden, The Netherlands.
Genetics. 1997 May;146(1):287-94. doi: 10.1093/genetics/146.1.287.
The normally circular eyespots on the wing of the butterfly Bicyclus anynana were selected to become elliptical in two divergent lines, with antero-posterior elongation of the eyespots in one line and proximodistal elongation in the other. Selection was continued for nine generations, and symmetrical realized heritabilities of approximately 15% were achieved initially. The elliptical eyespot shapes characteristic of each line were still produced when the signaling center of the eyespot (the focus) was surgically rotated by 90 or 180 degrees or when an eyespot was induced ectopically by localized damage. We conclude that selection changed general properties of the epidermis that responds to signals emanating from the eyespot focus but did not affect the mechanism of focal signaling.
在蝴蝶小环蛱蝶（Bicyclus anynana）翅膀上，通常呈圆形的眼斑被选在两条不同的品系中变成椭圆形，其中一个品系的眼斑在前后方向上拉长，另一个品系的眼斑在近端到远端方向上拉长。选择持续了九代，最初实现了约15%的对称狭义遗传力。当眼斑的信号中心（焦点）通过手术旋转90度或180度，或者当通过局部损伤异位诱导出一个眼斑时，每个品系特有的椭圆形眼斑形状仍然会产生。我们得出结论，选择改变了表皮对眼斑焦点发出的信号作出反应的一般特性，但没有影响焦点信号传导机制。
