Genetic Structure of Austrian and Italian Populations ofLimnocythere inopinata(Crustacea, Ostracoda): A Potential Case of Post-Glacial Parthenogenetic Invader?

Autor:	Giorgio Benassi, Walter Geiger, Valeria Rossi, Andrea Piotti, Paolo Menozzi
Rok vydání:	2010
Předmět:	Genetic diversity Ecology Pleistocene Metapopulation Parthenogenesis Biology Genetic structure Animal Science and Zoology Glacial period Genetic variability Quaternary Ecology Evolution Behavior and Systematics Nature and Landscape Conservation
Zdroj:	Annales Zoologici Fennici. 47:133-143
ISSN:	1797-2450 0003-455X
DOI:	10.5735/086.047.0206
Popis:	Several hypotheses were proposed to account for geographic parthenogenesis that is the disjointed distribution of a species' sexual and asexual forms. In the areas affected by glaciations the parthenogenetic forms would have had ecological success and hybridization and polyploidy would have been the driving forces in their success. Limnocythere inopinata is well-represented in Quaternary non-marine sequences and is useful for studying the evolution of geographic parthenogenesis. We analysed the genetic variability of twelve populations from sub alpine Italian lakes, Austrian lakes and a pond, in an area that was covered by ice during the Pleistocene. In all samples we found only parthenogenetic females. Using allozymes, we described at least 33 different clonal lineages in the total of 812 females. We found no evidence for polyploidy. Clonal diversity is relatively high and may reflect the genetic diversity of ancestral sexual metapopulations. In L. inopinata, geographical parthenogenesis seems the result...
Databáze:	OpenAIRE
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