Wiemers, Martin: Chromosome differentiation and the radiation of the butterfly subgenus Agrodiaetus (Lepidoptera: Lycaenidae: Polyommatus) : a molecular phylogenetic approach. - Bonn, 2003. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5n-02787
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5n-02787,
author = {{Martin Wiemers}},
title = {Chromosome differentiation and the radiation of the butterfly subgenus Agrodiaetus (Lepidoptera: Lycaenidae: Polyommatus) : a molecular phylogenetic approach},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2003,
note = {The subgenus Agrodiaetus which is distributed extensively in the Palaearctic region and especially in Southwest Asia is a species-rich group of blues which are often very similar morphologically but show a large variation in their chromosome numbers (n=10-125). The karyology of 64 taxa was successfully studied and the previously unknown chromosome numbers of 17 taxa were revealed. By means of molecular techniques it was possible to clarify the phylogeny of this group for the first time. A. damon, a species which is extremely widespread in the Palearctic region and has a constant chromosome number of n=45, is the sister-species of all other species of Agrodiaetus that have been tested. Presumably the colonization of Europe took place before the main radiations in the Anatolian-Caucasian-Iranian region. The greatest differences in the number of chromosomes were found in allopatrically distributed sister-species. It was surprising that morphologically extremely similar sympatric species with different numbers of chromosomes were not closely related, but often belonged to totally different clades, whereas some closely related sympatric species differed greatly in wing colours. This leads to the conclusion that changes in the number of chromosomes do not lead to sympatric speciation, but instead appear as a by-product of allopatric speciation and that such young species can only occur in sympatry after a sufficient differentiation in their phenotype to exclude erroneous matings. The comparison of mitochondrial with nuclear DNA sequences has also shown that hybridizations in Agrodiaetus are rare events. Supposedly they do not occur more frequently in Agrodiaetus than in other Lycaenidae. Only one of the specimen tested, which already drew our attention by its intermediate wing coloration, after molecular testing proved to be a hybrid of two nearly related but quite differently coloured species.},
url = {http://hdl.handle.net/20.500.11811/1944}

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