Some Peculiarities of Spatially and Sexually Restricted Gene Exchange in the Erebia tyndarus Group
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Excerpt
Introduction
The butterfly genus Erebia contains about 70 species widely distributed in mountainous areas of the Holarctic region. Their occasional restriction to small areas, often in close proximity to each other, makes this genus a suitable subject for studies of relationships between the geographical and genetical isolation of populations. However, till now, its advantages in this respect remained unexplored. In this paper a short review of my studies of the Erebia tyndarus group will be given, especially in connection with restricted gene exchange in the zones of contact or narrow overlap belts between very closely related units, where some unexplained relationships were found. Likewise unexpected genetical relationships were also detected between widely separated groups which, owing to their allopatry and slight morphological differences, are difficult to estimate taxonomically, a common trouble with the systematics of allopatric populations.
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Until quite recently, this group of species has been considered a...
